Results 1 to 10 of about 11,637 (211)

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

Astronomy & Astrophysics, 2022
Context. Stellar models applied to large stellar surveys of the Milky Way need to be properly tested against a sample of stars with highly reliable fundamental stellar parameters. We have established a programme aiming to deliver such a sample of stars. Aims.
Karovicova, I., White, T. R., Nordlander, T., Casagrande, L., Ireland, M., Huber, D.   +5 more
openaire   +7 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +1 more source

Accurate fundamental parameters for lower main-sequence stars [PDF]

Monthly Notices of the Royal Astronomical Society, 2006
34 pages, 20 figures. Accepted by MNRAS. Landscape table available online at http://users.utu.fi/luccas/IRFM/
Casagrande, L., Portinari, L., Flynn, C.
openaire   +2 more sources

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
openaire   +2 more sources

Accurate fundamental parameters of eclipsing binary stars [PDF]

Proceedings of the International Astronomical Union, 2004
The study of detached eclipsing binaries is one of the most powerful ways to investigate the properties of individual stars and stellar systems. We present preliminary masses, radii and effective temperatures for the eclipsing binary WW Aurigae, which is composed of two metallic-lined A-type stars.
Southworth, J, Smalley, B, Maxted, PFL, Etzel, PB   +3 more
openaire   +3 more sources

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

B stars in open clusters: fundamental parameters [PDF]

Proceedings of the International Astronomical Union, 2010
AbstractWe use the BCD spectrophotometric classification system to derive fundamental parameters of B stars in NGC 2439, NGC 3766 and NGC 6087. We are able to perform a complete study of each open cluster by deriving spectral classification of its members, distance modulus and age as well.
Aidelman, Yael Judith, Cidale, Lydia Sonia, Zorec, Juan, Arias, María Laura   +3 more
openaire   +2 more sources

Fundamental parameters of massive stars [PDF]

EAS Publications Series, 2004
21 pages, 3 figures, to appear in "Massive Stars: Formation, Evolution and Environment", eds. Heydari-Malayeri & Zahn (proceedings of 2002 Aussois summer school)
openaire   +2 more sources