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ADS astronomy entries on 2022-09-14
author:Schuster, Arthur
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Title: Demonstration of an x-ray Raman spectroscopy setup to study
warm dense carbon at the high energy density instrument of European
XFEL
Authors: Voigt, K.; Zhang, M.; Ramakrishna, K.; Amouretti, A.; Appel,
K.; Brambrink, E.; Cerantola, V.; Chekrygina, D.; Döppner, T.;
Falcone, R. W.; Falk, K.; Fletcher, L. B.; Gericke, D. O.; Göde,
S.; Harmand, M.; Hartley, N. J.; Hau-Riege, S. P.; Huang, L. G.;
Humphries, O. S.; Lokamani, M.; Makita, M.; Pelka, A.; Prescher, C.;
Schuster, A. K.; Šmíd, M.; Toncian, T.; Vorberger, J.; Zastrau,
U.; Preston, T. R.; Kraus, D.
2021PhPl...28h2701V Altcode:
We present a proof-of-principle study demonstrating x-ray Raman
Spectroscopy (XRS) from carbon samples at ambient conditions in
conjunction with other common diagnostics to study warm dense
matter, performed at the high energy density scientific instrument
of the European x-ray Free Electron Laser (European XFEL). We obtain
sufficient spectral resolution to identify the local structure and
chemical bonding of diamond and graphite samples, using highly annealed
pyrolytic graphite spectrometers. Due to the high crystal reflectivity
and XFEL brightness, we obtain signal strengths that will enable
accurate XRS measurements in upcoming pump-probe experiments with a
high repetition-rate, where the samples will be pumped with high-power
lasers. Molecular dynamics simulations based on density functional
theory together with XRS simulations demonstrate the potential of this
technique and show predictions for high-energy-density conditions. Our
setup allows simultaneous implementation of several different diagnostic
methods to reduce ambiguities in the analysis of the experimental
results, which, for warm dense matter, often relies on simplifying
model assumptions. The promising capabilities demonstrated here provide
unprecedented insights into chemical and structural dynamics in warm
dense matter states of light elements, including conditions similar
to the interiors of planets, low-mass stars, and other celestial bodies.
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Title: Measuring the structure and equation of state of polyethylene
terephthalate at megabar pressures
Authors: Lütgert, J.; Vorberger, J.; Hartley, N. J.; Voigt, K.;
Rödel, M.; Schuster, A. K.; Benuzzi-Mounaix, A.; Brown, S.; Cowan,
T. E.; Cunningham, E.; Döppner, T.; Falcone, R. W.; Fletcher, L. B.;
Galtier, E.; Glenzer, S. H.; Laso Garcia, A.; Gericke, D. O.; Heimann,
P. A.; Lee, H. J.; McBride, E. E.; Pelka, A.; Prencipe, I.; Saunders,
A. M.; Schölmerich, M.; Schörner, M.; Sun, P.; Vinci, T.; Ravasio,
A.; Kraus, D.
2021NatSR..1112883L Altcode:
We present structure and equation of state (EOS) measurements
of biaxially orientated polyethylene terephthalate (PET,
(<SUB>C1<SUB>0</SUB>H<SUB>8</SUB>O<SUB>4</SUB>) n</SUB>?, also called
mylar) shock-compressed to (155 ±20 ?) GPa and (6000 ±1000 ?) K
using in situ X-ray diffraction, Doppler velocimetry, and optical
pyrometry. Comparing to density functional theory molecular dynamics
(DFT-MD) simulations, we find a highly correlated liquid at conditions
differing from predictions by some equations of state tables,
which underlines the influence of complex chemical interactions
in this regime. EOS calculations from ab initio DFT-MD simulations
and shock Hugoniot measurements of density, pressure and temperature
confirm the discrepancy to these tables and present an experimentally
benchmarked correction to the description of PET as an exemplary
material to represent the mixture of light elements at planetary
interior conditions.
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Title: Hematite phase diagram under laser shock compression
Authors: Amouretti, A.; Harmand, M.; Boury, A.; Albertazzi, B.;
Benuzzi-Mounaix, A.; Chin, A.; Francois, G.; Koenig, M.; Kraus, D.;
Mathon, O.; Pascarelli, S.; Pépin, C.; Voigt, K.; Schuster, A.;
Sévelin-Radiguet, N.; Sollier, A.; Torchio, R.; Vinci, T.; Zhang,
M.; Fiquet, G.
2020AGUFMMR0160010A Altcode:
Until recently, iron oxides were assumed to comprise only FeO, Fe3O4,
and Fe2O3. However, static compression experiments have demonstrated
the existence of new iron oxide stoichiometries at high pressure and
temperature such as FeO2 [1], Fe4O5 [2], Fe5O6 [3], Fe13O19 [4]. These
discoveries, with the wide variety of iron oxides phases existing
at high pressure [5], highlight the complexity of iron-oxygen phase
diagram at extreme condition. In this context, measurements of physical
properties, phase transition processes and phase diagrams of Fe-O
systems with laser shock compression techniques offer opportunities to
extend the actual pressure and temperature ranges of such studies. Here,
we will present main results from a laser shock experiment at the ID24
ESRF beamline using time-resolved X-ray absorption measurement on Fe2O3
samples. In addition, we will show results from a recent experiment
performed at LULI 2000 to measure the equation of state and calculate
sound velocities along the Fe2O3 Hugoniot and above 500GPa. <P />[1]
Hu2016 [2] Lavina 2011 [3] Lavina 2015 [4] Merlini 2015 [5] Bykova 2016
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Title: Chemistry and structural properties of C-H-O mixtures at
conditions comparable to the interiors of ice giants
Authors: Kraus, D.; Hartley, N.; Vorberger, J.; Lütgert, J.; Rödel,
M.; Chekrygina, D.; Schuster, A.; Voigt, K.; Ravasio, A.; Yabuuchi,
T.; Zhang, M.; Ozaki, N.
2020AGUFMP074...03K Altcode:
The interiors of the ice giants Uranus and Neptune are dominated by
a warm dense mixture of light elements, which presumably results in
complex chemistry and phase transitions. New experimental capabilities,
such as the combination of high-energy lasers and X-ray free
electron lasers, allow for investigating such states of matter with
unprecedented detail in the laboratory [1-6]. Here we show results
from C-H-O samples dynamically compressed to pressures around 200
GPa and heated to temperatures of few thousand kelvins. Structural
changes recorded by both in situ X-ray diffraction and small angle
X-ray scattering show phase separation of carbon, which is evidently
not retarded or prevented by the presence of oxygen. In contrast, we
find that carbon is transferred to diamond more effectively in C-H-O
in comparison to C-H samples brought to similar conditions. These
findings are in line with quantum simulations predicting that the
presence of oxygen more supports than prevents the phase separation
of carbon and hydrogen. Besides carbon precipitation, this process may
also trigger the creation of isolated metallic hydrogen or superionic
ices and therefore can have significant consequences for the internal
structure of icy giant planets.
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Title: Direct Observation of Shock-Induced Disordering of Enstatite
Below the Melting Temperature
Authors: Hernandez, J. -A.; Morard, G.; Guarguaglini, M.; Alonso-Mori,
R.; Benuzzi-Mounaix, A.; Bolis, R.; Fiquet, G.; Galtier, E.; Gleason,
A. E.; Glenzer, S.; Guyot, F.; Ko, B.; Lee, H. J.; Mao, W. L.; Nagler,
B.; Ozaki, N.; Schuster, A. K.; Shim, S. H.; Vinci, T.; Ravasio, A.
2020GeoRL..4788887H Altcode:
We report in situ structural measurements of shock-compressed
single crystal orthoenstatite up to 337 ± 55 GPa on the Hugoniot,
obtained by coupling ultrafast X-ray diffraction to laser-driven shock
compression. Shock compression induces a disordering of the crystalline
structure evidenced by the appearance of a diffuse X-ray diffraction
signal at nanosecond timescales at 80 ± 13 GPa on the Hugoniot, well
below the equilibrium melting pressure (>170 GPa). The formation
of bridgmanite and post-perovskite have been indirectly reported in
microsecond-scale plate-impact experiments. Therefore, we interpret
the high-pressure disordered state we observed at nanosecond scale as
an intermediate structure from which bridgmanite and post-perovskite
crystallize at longer timescales. This evidence of a disordered
structure of MgSiO<SUB>3</SUB> on the Hugoniot indicates that the
degree of polymerization of silicates is a key parameter to constrain
the actual thermodynamics of shocks in natural environments.
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Title: Demonstration of X-ray Thomson scattering as diagnostics for
miscibility in warm dense matter
Authors: Frydrych, S.; Vorberger, J.; Hartley, N. J.; Schuster,
A. K.; Ramakrishna, K.; Saunders, A. M.; van Driel, T.; Falcone,
R. W.; Fletcher, L. B.; Galtier, E.; Gamboa, E. J.; Glenzer, S. H.;
Granados, E.; MacDonald, M. J.; MacKinnon, A. J.; McBride, E. E.;
Nam, I.; Neumayer, P.; Pak, A.; Voigt, K.; Roth, M.; Sun, P.; Gericke,
D. O.; Döppner, T.; Kraus, D.
2020NatCo..11.2620F Altcode:
The gas and ice giants in our solar system can be seen as a
natural laboratory for the physics of highly compressed matter at
temperatures up to thousands of kelvins. In turn, our understanding
of their structure and evolution depends critically on our ability to
model such matter. One key aspect is the miscibility of the elements
in their interiors. Here, we demonstrate the feasibility of X-ray
Thomson scattering to quantify the degree of species separation in a
1:1 carbon-hydrogen mixture at a pressure of ~150 GPa and a temperature
of ~5000 K. Our measurements provide absolute values of the structure
factor that encodes the microscopic arrangement of the particles. From
these data, we find a lower limit of 2 4<SUB>-7</SUB><SUP>+6</SUP>?% of
the carbon atoms forming isolated carbon clusters. In principle, this
procedure can be employed for investigating the miscibility behaviour
of any binary mixture at the high-pressure environment of planetary
interiors, in particular, for non-crystalline samples where it is
difficult to obtain conclusive results from X-ray diffraction. Moreover,
this method will enable unprecedented measurements of mixing/demixing
kinetics in dense plasma environments, e.g., induced by chemistry or
hydrodynamic instabilities.
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Title: Measurement of diamond nucleation rates from hydrocarbons at
conditions comparable to the interiors of icy giant planets
Authors: Schuster, A. K.; Hartley, N. J.; Vorberger, J.; Döppner,
T.; van Driel, T.; Falcone, R. W.; Fletcher, L. B.; Frydrych, S.;
Galtier, E.; Gamboa, E. J.; Gericke, D. O.; Glenzer, S. H.; Granados,
E.; MacDonald, M. J.; MacKinnon, A. J.; McBride, E. E.; Nam, I.;
Neumayer, P.; Pak, A.; Prencipe, I.; Voigt, K.; Saunders, A. M.; Sun,
P.; Kraus, D.
2020PhRvB.101e4301S Altcode:
We present measurements of the nucleation rate into a diamond lattice
in dynamically compressed polystyrene obtained in a pump-probe
experiment using a high-energy laser system and in situ femtosecond
x-ray diffraction. Different temperature-pressure conditions that
occur in planetary interiors were probed. For a single shock reaching
70 GPa and 3000 K no diamond formation was observed, while with a
double shock driving polystyrene to pressures around 150 GPa and
temperatures around 5000 K nucleation rates between 10<SUP>29</SUP>
and 10<SUP>34</SUP>m<SUP>-3</SUP> s<SUP>-1</SUP> were recorded. These
nucleation rates do not agree with predictions of the state-of-the-art
theoretical models for carbon-hydrogen mixtures by many orders of
magnitude. Our data suggest that there is significant diamond formation
to be expected inside icy giant planets like Neptune and Uranus.
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Title: Formation of diamonds in laser-compressed hydrocarbons at
planetary interior conditions
Authors: Kraus, D.; Vorberger, J.; Pak, A.; Hartley, N. J.; Fletcher,
L. B.; Frydrych, S.; Galtier, E.; Gamboa, E. J.; Gericke, D. O.;
Glenzer, S. H.; Granados, E.; MacDonald, M. J.; MacKinnon, A. J.;
McBride, E. E.; Nam, I.; Neumayer, P.; Roth, M.; Saunders, A. M.;
Schuster, A. K.; Sun, P.; van Driel, T.; Döppner, T.; Falcone, R. W.
2017NatAs...1..606K Altcode:
The effects of hydrocarbon reactions and diamond precipitation on
the internal structure and evolution of icy giant planets such
as Neptune and Uranus have been discussed for more than three
decades<SUP>1</SUP>. Inside these celestial bodies, simple
hydrocarbons such as methane, which are highly abundant in
the atmospheres<SUP>2</SUP>, are believed to undergo structural
transitions<SUP>3,4</SUP> that release hydrogen from deeper layers
and may lead to compact stratified cores<SUP>5-7</SUP>. Indeed,
from the surface towards the core, the isentropes of Uranus and
Neptune intersect a temperature-pressure regime in which methane
first transforms into a mixture of hydrocarbon polymers<SUP>8</SUP>,
whereas, in deeper layers, a phase separation into diamond and
hydrogen may be possible. Here we show experimental evidence for
this phase separation process obtained by in situ X-ray diffraction
from polystyrene (C<SUB>8</SUB>H<SUB>8</SUB>)<SUB>n</SUB> samples
dynamically compressed to conditions around 150 GPa and 5,000 K;
these conditions resemble the environment around 10,000 km below the
surfaces of Neptune and Uranus<SUP>9</SUP>. Our findings demonstrate
the necessity of high pressures for initiating carbon-hydrogen
separation<SUP>3</SUP> and imply that diamond precipitation may require
pressures about ten times as high as previously indicated by static
compression experiments<SUP>4,8,10</SUP>. Our results will inform
mass-radius relationships of carbon-bearing exoplanets<SUP>11</SUP>,
provide constraints for their internal layer structure and improve
evolutionary models of Uranus and Neptune, in which carbon-hydrogen
separation could influence the convective heat transport<SUP>7</SUP>.
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Title: Recent Total Solar Eclipses
Authors: Schuster, Arthur
1970ast2.conf..358S Altcode:
No abstract at ADS
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Title: Norman Lockyer and the Total Solar Eclipse of 1875
Authors: Schuster, Arthur
1929Natur.124..838S Altcode:
MAY I, for the sake of historical accuracy, beg leave to comment on
two conflicting passages in the recently published volume, “The Life
and Work of Sir Norman Lockyer”, both referring to the total solar
eclipse of 1875.
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Title: The Deflection of Light during a Solar Eclipse
Authors: Schuster, Arthur
1920Natur.104..468S Altcode:
IN discussing the effects of atmospheric refraction during solar
eclipses Prof. Anderson disregards the shallowness of the effective
layer of air as compared with the diameter of the moon's shadow. Unless
the sun be very near the horizon, a line of sight drawn from the centre
of the umbra to a point in the corona will remain within the umbra right
through this layer. This consideration vitiates the method of solution
adopted by Prof. Anderson, and consequently its results. On reading his
first letter (NATURE, December 4, 1919) I was struck by the ingenuity
of his explanation, more especially as I believe he under valued the
amount of the angular deviation arrived at on his theory through taking
the sun's radius to be half, instead of a quarter of, a degree. In
view of the importance of the subject, a fuller investigation seemed
to be required. I hope soon to publish a note giving the complete
solution of the problem, and may therefore confine myself here to
a statement of the result, which is quite fatal to Prof. Anderson's
explanation. I take the altitude of the sun to be 45° and the maximum
fall of temperature 4° the figures given may easily be modified to suit
other conditions. I further assume the most favourable distribution
of temperature, which is that adopted by Prof. Anderson, when the
line of maximum fall of temperature is parallel to the edges of the
moon's shadow and independent of altitude. Two stars at a distance of
three solar, diameters from each other might then show an increase in
apparent distance owing to refraction amounting to the 240,000th part
of a second of arc. If the diminution of the temperature effect with
altitude be taken into account, this figure should be divided by 4.
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Title: The Green Flash
Authors: Schuster, Arthur
1915Natur..95....8S Altcode:
PROF. PORTER'S explanation of the green flash (NATURE, February 18)
is unable to account for its appearance at sunrise, when it can be
observed with great brilliance. When I was passing through the Indian
Ocean on my way to observe the total eclipse of 1875 I happened to
be on deck before sunrise one morning, and, watching for the first
ray of the sun, was surprised to see the first flash of light appear
as a vivid green. I had never heard of the phenomenon before, but
atmospheric dispersion seemed to me sufficient to account for it, and
I took it for granted that it was a well-known occurrence. I continued
to observe the same effect several mornings in succession.
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Title: A critical examination of the possible causes of terrestrial
magnetism. E. L.
Authors: Schuster, A.; Lagrange, E.
1912C&T....33..321S Altcode:
No abstract at ADS
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Title: The Influence of Planets on the Formation of Sun-Spots
Authors: Schuster, Arthur
1911RSPSA..85..309S Altcode:
No abstract at ADS
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Title: On the Magnetic Action of Sun-spots.
Authors: Schuster, Arthur
1909Natur..79..279S Altcode:
IT was perhaps to be expected that the recent discovery of the Zeeman
effect in the spectra of sun-spots should revive the idea of a direct
magnetic action originating in the sun and observable at the surface
of the earth. A numerical estimate is therefore called for as to
the magnitude of the disturbance which might be produced by such a
direct action.
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Title: The 4.79 Period of Sun-spot Activity
Authors: Schuster, Arthur
1908Natur..79....7S Altcode:
IN NATURE of August 13 (p. 351) the photograph is published of two
groups of sun-spots taken on August 6, and attention is directed to the
remarkable fact that such an outbreak should occur two years after the
sun-spot maximum. This renewed sun-spot activity is connected with the
4.79 period, which I have shown to have been quite persistent-even more
so than the eleven-year period-since sun-spots were first systematically
observed. In a paper published in the Philosophical Transactions for
1906 I gave the times of maxima of this period as being 1903.72+4.79
n. This would bring the maximum to 1908.51, or to about July 1 of the
present year. A retardation of one month in a period of more than four
years' duration is, of course, insignificant.
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Title: On the Velocity of Metallic Particles in the Spark Discharge
Authors: Schuster, Arthur
1907ApJ....25..277S Altcode:
No abstract at ADS
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Title: Dr See's researches
Authors: Schuster, A.
1906Obs....29..424S Altcode:
No abstract at ADS
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Title: On Mr. T. J. J. See's researches concerning the constitution
of Stellar Bodies
Authors: Schuster, A.
1906AN....173...45S Altcode: 1907AN....173...45S
No abstract at ADS
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Title: Chinese records of sun-spots and their periodicity
Authors: Schuster, A.
1906Obs....29..205S Altcode:
No abstract at ADS
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Title: The Periodicity of Sun-Spots
Authors: Schuster, Arthur
1906ApJ....23..101S Altcode:
No abstract at ADS
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Title: A Plea for Absolute Motion
Authors: Schuster, Arthur
1906Natur..73..462S Altcode:
NEWTON believed in the possibility of absolute motion (i.e. motion in
space not necessarily relative to other material bodies), founding his
argument on the fact that the rotation of a planet might be detected
by experiment on the planet itself without reference to outside
bodies. Newton's reasoning is unanswerable, but it only takes us part
of the way. Though it proves that using the principle of gyrostatic
action we can determine direction in space absolutely, it fails
to distinguish one parallel line from another. We can only observe
relative motion. This statement, which no one doubts, is generally
taken to be synonymous with the assertion that nothing but relative
motion will ever be known. So firmly is this generalisation rooted in
the present generation of philosophers that I am afraid the expression
of a contrary opinion will only result in placing its author on the
“Index” of De Morgan's Budget of Paradoxes.
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Title: The Periodogram and Its Optical Analogy
Authors: Schuster, Arthur
1906RSPSA..77..136S Altcode:
No abstract at ADS
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Title: Preparations for the Second Conference. No. 11. Intensity of
Solar Radiation
Authors: Schuster, Arthur
1906TIUCS...1...63S Altcode:
No abstract at ADS
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Title: On the Periodicities of Sunspots
Authors: Schuster, Arthur
1906RSPTA.206...69S Altcode:
No abstract at ADS
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Title: Transactions of the International union for co-operation in
solar research ...
Authors: SCHUSTER, ARTHUR
1906tiuc.book.....S Altcode: 1906QB521.I6.......
No abstract at ADS
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Title: Preparations for the Second Conference. No. 10. Circular
Letter addressed to Members of the Union
Authors: Schuster, Arthur
1906TIUCS...1...62S Altcode:
No abstract at ADS
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Title: Preparations for the Second Conference. No. 9. Circular Letter
addressed to Members of the Union
Authors: Schuster, Arthur
1906TIUCS...1...59S Altcode:
No abstract at ADS
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Title: The Optics of the Spectroscope
Authors: Schuster, Arthur
1905ApJ....21..197S Altcode:
No abstract at ADS
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Title: The Temperature of the Solar Atmosphere
Authors: Schuster, Arthur
1905ApJ....21..258S Altcode:
No abstract at ADS
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Title: Magnetic disturbances and associated sun-spots
Authors: Schuster, A.
1905MNRAS..65..186S Altcode:
No abstract at ADS
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Title: Radiation Through a Foggy Atmosphere
Authors: Schuster, Arthur
1905ApJ....21....1S Altcode:
No abstract at ADS
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Title: Radiation through a foggy atmosphere
Authors: Schuster, A.
1903Obs....26..379S Altcode:
No abstract at ADS
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Title: The Evolution of Solar Stars
Authors: Schuster, Arthur
1903ApJ....17..165S Altcode:
No abstract at ADS
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Title: The Solar Atmosphere
Authors: Schuster, Arthur
1902ApJ....16..320S Altcode:
No abstract at ADS
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Title: Meeting of the British Association - Astronomy and Cosmical
Physics
Authors: Schuster, A.
1902Obs....25..349S Altcode:
No abstract at ADS
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Title: On the resolution of double-stars
Authors: Schuster, A.
1900Obs....23..402S Altcode:
No abstract at ADS
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Title: The Origin of the Aurora Spectrum
Authors: Schuster, Arthur
1898Natur..58Q.151S Altcode:
PROF. RAMSAY gives the wave-length of the principal line in his new
gas as 5566. It will no doubt also occur to others that this is very
near the wave-length of the aurora line, which Vogel has measured
as 5569. It should be mentioned in connection with this line that
Profs. Liveing and Dewar have observed one very near it at 557 in sparks
taken in liquid oxygen. The second green line given by Prof. Ramsay
as 5557, seems also to have been seen by these observers (Phil. Mag.,
xxxviii. p. 237, 1894).
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Title: On Lunar and Solar Periodicities of Earthquakes
Authors: Schuster, Arthur
1897Natur..56..321S Altcode:
No abstract at ADS
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Title: On Lunar and Solar Periodicities of Earthquakes
Authors: Schuster, Arthur
1897RSPS...61..455S Altcode:
No abstract at ADS
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Title: On the mode of printing maps of spectra and tables of
wave-lengths
Authors: Schuster, Arthur
1897YerOB...5..415S Altcode:
No abstract at ADS
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Title: Note on the Results of Messrs. Jewell, Humphreys and Mohler.
Authors: Schuster, Arthur
1896ApJ.....3..292S Altcode:
No abstract at ADS
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Title: Magnetic Influence of the Planets
Authors: Schuster, Arthur
1896Natur..53..318S Altcode:
No abstract at ADS
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Title: The Diurnal Variation of Terrestrial Magnetism. [Abstract]
Authors: Schuster, Arthur; Lamb, H.
1888RSPS...45..481S Altcode:
No abstract at ADS
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Title: On the Total Solar Eclipse of August 29, 1886
Authors: Darwin, L.; Schuster, Arthur; Maunder, E. Walter
1888RSPS...45..354D Altcode:
No abstract at ADS
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Title: On the Total Solar Eclipse of August 29, 1886 (Preliminary
Account)
Authors: Schuster, Arthur
1887RSPS...42..180S Altcode:
No abstract at ADS
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Title: On the Total Solar Eclipse of May 17, 1882
Authors: Abney, W. De W.; Schuster, Arthur
1884RSPT..175..253A Altcode:
No abstract at ADS
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Title: On the Internal Constitution of the Sun
Authors: Schuster, Arthur
1883RBAAS..53..427S Altcode:
No abstract at ADS
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Title: On the Total Solar Eclipse of May 17, 1882. [Abstract]
Authors: Schuster, Arthur; Abney, W. De W.
1883RSPS...35..151S Altcode:
No abstract at ADS
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Title: Observations made during Total Solar Eclipses
Authors: Schuster, Arthur
1880Natur..21..488S Altcode:
No abstract at ADS
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Title: on the polarisation of the Solar Corona
Authors: Schuster, A.
1879MNRAS..40...35S Altcode:
No abstract at ADS
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Title: on the probable presence of oxygen in the solar chromosphere
Authors: Schuster, A.
1879MNRAS..39..388S Altcode:
No abstract at ADS
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Title: The sun's corona and meteor streams
Authors: Schuster, A.
1879Obs.....2..351S Altcode:
No abstract at ADS
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Title: The sun's corona during the eclipse of 1878
Authors: Schuster, A.
1878Obs.....2..262S Altcode:
No abstract at ADS
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Title: Solar of July 29, 1878
Authors: Schuster, A.
1878MNRAS..39R..44S Altcode:
No abstract at ADS
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Title: some remarks on the total solar eclipse of July 29, 1878
Authors: Schuster, A.
1878MNRAS..39Q..44S Altcode:
No abstract at ADS
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Title: On the presence of oxygen in the sun
Authors: Schuster, A.
1878Obs.....1..315S Altcode:
No abstract at ADS
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Title: Report on the Total Solar Eclipse of April 6, 1875
Authors: Lockyer, J. N.; Schuster, Arthur
1878RSPT..169..139L Altcode:
No abstract at ADS
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Title: Beobachtungen angestellt auf der Sternwarte des Kammerherrn
von Bülow Heft III
Authors: Schuster, Arthur
1876Natur..13..402S Altcode:
No abstract at ADS
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Title: The Late Eclipse
Authors: Schuster, Arthur
1875Natur..13...86S Altcode:
ON my return from India I should like to say a few words about
some letters which appeared in the English Mechanic during my
absence. Mr. Proctor, and a writer signing himself “A Fellow of the
Royal Astronomical Society,” comment in these letters on the result of
the late Eclipse Expedition. It would be better if these discussions
were postponed until the results are published by the Royal Society,
but if writers who have not heard anything beyond a few short telegrams
take it upon themselves to enlighten the public as to the value of
photographs which they have not seen, a few remarks of one who has
seen them become necessary.
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Title: Sun-spots and the Vine Crop
Authors: Schuster, Arthur
1872Natur...5..501S Altcode:
As the connection of sun-spots with terrestrial phenomena is now
largely occupying the attention of scientific men, the following facts
may be of some interest. The years in which the wine crop in Germany
was unusually good seem (in this century, at least) to have returned
at regular intervals. The close coincidence of these years with the
years of minimum sun-spots is shown by the following table :-
