Results 31 to 40 of about 6,001 (306)

Study of atmospheres in the solar system, from stellar occultation or planetary transit

Comptes Rendus. Physique, 2022
Stellar occultations and transits occur when a planetary body passes in front of a star (including our Sun). For objects with an atmosphere, refraction plays an essential role to explain the drops of flux and the aureoles observed during these events ...
Sicardy, Bruno
doaj   +1 more source

The Interaction Between Accretion from the Interstellar Medium and Accretion from the Evolved Binary Component in Barium Stars [PDF]

Journal of Astronomy and Space Sciences, 2018
The reanalysis of the previously published abundance pattern of mild barium star HD202109 (ζ Cyg) and the chemical compositions of 129 thin disk barium stars facilitated the search for possible correlations of different stellar parameters with second ...
Yeuncheol Jeong, Alexander V. Yushchenko, Dmytry N. Doikov   +2 more
doaj   +1 more source

The Shapes of Stellar Spectra

Atoms, 2023
Stellar atmospheres separate the hot and dense stellar interiors from the emptiness of space. Radiation escapes from the outermost layers of a star, carrying direct physical information.
Carlos Allende Prieto
doaj   +1 more source

CHARA/MIRC observations of two M supergiants in perseus OB1 : temperature, Bayesian modeling, and compressed sensing imaging [PDF]

, 2014
The authors acknowledge funding from the NSF through award AST-0807577 to the University of Michigan, as well as funding by the Australian Research Council and the "Lendület Fiatal Kutatói Program" of the Hungarian Academy of Sciences for the initial ...
A. Aarnio, F. Baron, T. A. Ten Brummelaar, H. R. Neilson, Aarnio, A., Monnier, J. D., Neilson, H. R., E. Pedretti, McAlister, H. A., Ten Brummelaar, T. A., Thureau, N., Ridgway, S.~T., Kiss, L. László, M. Zhao, Zhao, M., Turner, N., J. D. Monnier, Pedretti, E., Kiss, L.~L., Neilson, H.R., H. A. Mcalister, N. Turner, L. L. Kiss, M. Anderson, McAlister, H.A., Baron, F., Monnier, J.~D., L. Sturmann, McAlister, H.~A., Neilson, H.~R., ten Brummelaar, T.~A., Anderson, M., Ten Brummelaar, T.A., S. T. Ridgway, Kiss, L.L., Ridgway, S. T., N. Thureau, Ridgway, S.T., Kiss, L. L., Monnier, J.D., Sturmann, J., J. Sturmann, Sturmann, L.   +42 more
core   +1 more source

STEllAR-GROUP/octotiger: Kokkos kernels [PDF]

, 2021
What's Changed Branch by @diehlpk in https://github.com/STEllAR-GROUP/octotiger/pull/341 Add Zenodo DOI by @diehlpk in https://github.com/STEllAR-GROUP/octotiger/pull/342 Docu by @diehlpk in https://github.com/STEllAR-GROUP/octotiger/pull/347 Add ...
Biddiscombe, John, Amini, Parsa, Kevin Huck, Patrick Diehl, Marcello, Dominic, Kaiser, Hartmut, Dominic Marcello, Schaefer, Andreas, Huck, Kevin, Parsa Amini, Heller, Thomas, Diehl, Patrick, Shiber, Sagiv, Thomas Heller, Andreas Schäfer, Bryce Adelstein Lelbach aka wash, shibersag, Gregor Daiß, Daiß, Gregor, Adelstein Lelbach, Bryce, Hartmut Kaiser, John Biddiscombe   +21 more
core   +1 more source

2D MODELLING OF THE GAS FLOW STRUCTURE IN THE SYMBIOTIC STAR Z ANDROMEDAE

Odessa Astronomical Publications, 2017
The 2D gasdynamical simulations of gas structure in the symbiotic star Z And have been carried out for different stellar wind regimes. Since the mechanisms of gas acceleration in stellar atmospheres are not well studied, the parametric representation of ...
E. Yu. Kilpio
doaj   +1 more source

Dimension in a Radiative Stellar Atmosphere [PDF]

General Relativity and Gravitation, 2001
Dimensional scales are examined in an extended 3+1 Vaidya atmosphere surrounding a Schwarzschild source. At one scale, the Vaidya null fluid vanishes and the spacetime contains only a single spherical 2-surface. Both of these behaviors can be addressed by including higher dimensions in the spacetime metric.
Krisch, J. P., Glass, E. N.
openaire   +3 more sources

Limb darkening in spherical stellar atmospheres [PDF]

, 2011
Context. Stellar limb darkening, I(μ = cosθ), is an important constraint for microlensing, eclipsing binary, planetary transit, and interferometric observations, but is generally treated as a parameterized curve, such as ...
H. R. Neilson, J. B. Lester
core   +1 more source

Solar and stellar photospheric abundances

Living Reviews in Solar Physics, 2016
The determination of photospheric abundances in late-type stars from spectroscopic observations is a well-established field, built on solid theoretical foundations.
Carlos Allende Prieto
doaj   +1 more source

Statistical Signatures of Nanoflare Activity. III. Evidence of Enhanced Nanoflaring Rates in Fully Convective stars as Observed by the NGTS

The Astrophysical Journal, 2023
Previous examinations of fully convective M-dwarf stars have highlighted enhanced rates of nanoflare activity on these distant stellar sources. However, the specific role the convective boundary, which is believed to be present for spectral types earlier
S. D. T. Grant, D. B. Jess, C. J. Dillon, M. Mathioudakis, C. A. Watson, J. A. G. Jackman, D. G. Jackson, P. J. Wheatley, M. R. Goad, S. L. Casewell, D. R. Anderson, M. R. Burleigh, R. G. West, J. I. Vines   +13 more
doaj   +1 more source