Results 31 to 40 of about 206,533 (326)

Fundamental parameters of subgiant stars in detached eclipsing binary systems [PDF]

, 2019
Detailed studies of stars in long-period, detached eclipsing binary systems remain one of the best ways to test stellar evolutionary models. With so many detections of planets outside of the solar system, research has turned to the characterisation of these planets, which requires a good understanding of the planet host star. For the majority of single
Jessica Ann Evans
openalex   +1 more source

Open clusters: III. Fundamental parameters of B stars in NGC 6087, NGC 6250, NGC 6383 and NGC 6530. B type stars with circumstellar envelopes [PDF]

, 2017
Context. Stellar physical properties of star clusters are poorly known. Aims. Our goals are to perform a spectrophotometric study of the B star population in open clusters to derive accurate stellar parameters, search for the presence of circumstellar ...
Y. Aidelman, L. S. Cidale, J. Zorec, J. A. Panei   +3 more
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The Mass–Temperature Relation for B and Early A Stars Based on International Ultraviolet Explorer Spectra of Detached Eclipsing Binaries

The Astronomical Journal, 2023
Ultraviolet spectra were taken of 25 detached eclipsing binaries (DEBs) with spectral types O, B, and early A with the International Ultraviolet Explorer satellite in the 1150–1900 Å region. The spectra were compared with BOSZ model atmospheres.
Nancy Remage Evans, Mckenzie G. Ferrari, Joanna Kuraszkiewicz, Steven Silverberg, Joy Nichols, Guillermo Torres, Makenzi Fischbach   +6 more
doaj   +1 more source

Fundamental stellar parameters of benchmark stars from CHARA interferometry [PDF]

Astronomy & Astrophysics, 2020
Context.Benchmark stars are crucial as validating standards for current as well as future large stellar surveys of the Milky Way. However, the number of suitable metal-poor benchmark stars is currently limited, owing to the difficulty in determining reliable effective temperatures (Teff) in this regime.Aims.We aim to construct a new set of metal-poor ...
I. Karovicova, T. R. White, T. Nordlander, L. Casagrande, M. Ireland, D. Huber, P. Jofré   +6 more
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Rotation: a fundamental parameter of massive stars [PDF]

Symposium - International Astronomical Union, 1997
Massive stars are rapid rotators. Equatorial rotation velocities span the range vrot = 100–400 km s−1, with B stars rotating closest to their break-up speed vcrit (Howarth et al. 1997). During the last decade, many observations have revealed unusual surface abundances that may require additional internal mixing (beyond that of simple convection and ...
Langer, Norbert, Heer, A., Fliegner, Jana Ute   +2 more
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Fundamental Parameters of the W Serpentis Stars [PDF]

International Astronomical Union Colloquium, 1989
AbstractApplication of digital cross-correlation spectroscopy to the spectra of the W Serpentis binaries SX Cas and RX Cas has allowed an accurate determination of the orbits and rotations of the (mass-losing) K-subgiant secondary components. The distortion of the primary radial-velocity curves due to the influence of the prominent accretion disks in ...
J. Andersen, B. Nordström
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Gaia FGK Benchmark Stars: Effective temperatures and surface gravities [PDF]

, 2015
Large Galactic stellar surveys and new generations of stellar atmosphere models and spectral line formation computations need to be subjected to careful calibration and validation and to benchmark tests.
Gustafsson, B., Heiter, U., Jofré, P., Korn, A. J., Soubiran, C., Thévenin, F.   +5 more
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The fundamental parameters of the roAp starγ Equulei [PDF]

Astronomy & Astrophysics, 2011
Physical processes working in the stellar interiors as well as the evolution of stars depend on some fundamental stellar properties, such as mass, radius, luminosity, and chemical abundances. A classical way to test stellar interior models is to compare the predicted and observed location of a star on theoretical evolutionary tracks in a H-R diagram ...
Perraut, K., Brandão, I., Mourard, D., Cunha, M., Bério, P., Bonneau, D., Chesneau, O., Clausse, J.M., Delaa, O., Marcotto, A., Roussel, A., Spang, A., Stee, P., Tallon-Bosc, I., Mcalister, H., ten Brummelaar, T., Sturmann, J., Sturmann, L., Turner, N., Farrington, C., Goldfinger, P.J.   +20 more
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Fundamental parameters of 16 late-type stars derived from their angular diameter measured with VLTI/AMBER★ [PDF]

, 2013
Thanks to their large angular dimension and brightness, red giants and supergiants are privileged targets for optical long-baseline interferometers. 16 red giants and supergiants have been observed with the VLTI/AMBER facility over a 2-year period, at ...
P. Cruzalèbes, A. Jorissen, Y. Rabbia, Stéphane Sacuto, A. Chiavassa, E. Pasquato, B. Plez, Kimmo Eriksson, A. Spang, O. Chesneau   +9 more
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FUNDAMENTAL PARAMETERS OF SUPERGIANT STAR HD 40589 (A0Iab)

Odessa Astronomical Publications, 2023
У цій роботі були визначені фундаментальні параметри зорі-надгігінта HD 40589 (A0Iab), а саме ефективна температура (Teff), прискорення сили тяжіння (log g), мікротурбулентна швидкість (ξt) і металічність [Fe/H]. Відстань до зорі 1734 пк. Висота над площиною Галактики становить 67,5 пк.
Z. A. Samedov, U. R. Rustem, G. M. Hajiyeva, Z. F. Aliyeva   +3 more
openaire   +3 more sources