Results 1 to 10 of about 12,133 (162)

Fundamental parameters and infrared excesses of Tycho–Gaia stars [PDF]

Monthly Notices of the Royal Astronomical Society, 2017
43 pages, 50 figures, accepted ...
I Mcdonald, A A Zijlstra, R A Watson
exaly   +5 more sources

Fundamental parameters of He-weak and He-strong stars [PDF]

Astronomy and Astrophysics, 2007
We carried out low resolution spectroscopic observations in the wavelength range 3400-4700 A of 20 He-weak and 8 He-strong stars to determine their fundamental parameters by means of the Divan-Chalonge-Barbier (BCD) spectrophotometric system. For a few He-weak stars we also estimate the effective temperatures and the angular diameters by integrating ...
L S Cidale, M L Arias, Y Frémat
exaly   +6 more sources

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/
Luca Casagrande, Chris Flynn, Casagrande Luca   +2 more
exaly   +3 more sources

Fundamental parameters of eight Am stars: comparing observations with theory★ [PDF]

Monthly Notices of the Royal Astronomical Society, 2014
In this paper we present a detailed analysis of a sample of eight Am stars, four of them are in the Kepler field of view. We derive fundamental parameters for all observed stars, effective temperature, gravity, rotational and radial velocities, and chemical abundances by spectral synthesis method.
G Catanzaro, V Ripepi, Catanzaro G
exaly   +2 more sources

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

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

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 (Prof. Dr.), 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

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

The fundamental parameters of the roAp star 10 Aquilae [PDF]

Astronomy & Astrophysics, 2013
Due to the strong magnetic field and related abnormal surface layers existing in rapidly oscillating Ap stars, systematic errors are likely to be present when determining their effective temperatures, which potentially compromises asteroseismic studies of these pulsators.
Perraut, K., Borgniet, S., Cunha, M., Bigot, L., Brandão, I., Mourard, D., Nardetto, N., Chesneau, O., Mcalister, H., ten Brummelaar, T., Sturmann, J., Sturmann, L., Turner, N., Farrington, C., Goldfinger, P.   +14 more
openaire   +2 more sources