Results 31 to 40 of about 12,601 (116)
FUNDAMENTAL PARAMETERS OF SUPERGIANT STAR HD 40589 (A0Iab)
Odessa Astronomical Publications, 2023 The atmosphere of HD 40589 (A0Iab) supergiant star of A spectral class was studied using the model atmosphere and parallax methods. The effective temperatures (Teff) and surface of gravity (log g) were determined using a comparison of the observed and calculated values of the photometric quantities [c1], Q and the equivalent widths of the hydrogen ...
Z. A. Samedov +3 more
openaire +3 more sources
Fundamental Parameters of the Underlying Be Stars (Review Paper) [PDF]
International Astronomical Union Colloquium, 1987 AbstractThe various methods for determining masses, radii, luminosities, effective temperatures, spectral types, and rotational velocities of the underlying Be stars are reviewed, and representative values listed for each.
openaire +1 more source
Fundamental Parameters : Normal A0 Dwarf Stars of the Solar Neighbourhood [PDF]
Highlights of Astronomy, 1998 The purpose of this paper is to define a set of “standard”, “reference” or “comparison” stars, according to their use, of spectral type A0V in order to be used for further studies in the domain of peculiar stars as well as normal stars of thisTeffand luminosity range.
M. Gerbaldi +5 more
openaire +1 more source
The radius and other fundamental parameters of the F9 V star β Virginis [PDF]
Monthly Notices of the Royal Astronomical Society, 2009 We have used the Sydney University Stellar Interferometer (SUSI) to measure the angular diameter of the F9 V star beta Virginis. After correcting for limb darkening and combining with the revised Hipparcos parallax, we derive a radius of 1.703 +/- 0.022 R_sun (1.3%).
North, J. R. +12 more
openaire +3 more sources
Atmospheric and Fundamental Parameters of Eight Nearby Multiple Stars
The Astronomical Journal, 2022 Abstract We present the complete set of atmospheric and fundamental parameters, in addition to the masses, for the individual components of eight stellar systems. The list of the systems, whose orbital solutions were published recently, includes seven binaries (HIP 14524, HIP 16025, HIP 46199, HIP 47791, HIP 60444, HIP 61100, HIP 73085 ...
Abdallah M. Hussein +6 more
openaire +1 more source
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.
CATANZARO, GIOVANNI, Ripepi V.
openaire +1 more source
Energy Distributions and Fundamental Parameters of 6 A Stars [PDF]
International Astronomical Union Colloquium, 1993 AbstractThe energy distributions (EDs) of 6 peculiar (3 Aps and 3 λ Bootis) stars are presented from 1200Ȧ up to about 12000Ȧ. For those stars having infrared photometry, the integrated flux from 1200& to 22000Å has been calculated and the Infrared Flux Method (IRFM, Blackwell and Shallis, 1977) applied to derive effective temperatures and angular ...
openaire +1 more source
Fundamental parameters of “normal” B stars in the solar neighborhood [PDF]
Proceedings of the International Astronomical Union, 2010 AbstractUnderstanding phenomena of activity in stars, like pulsations or magnetism, benefits from systematic comparisons of some key physical parameters of active with those of “normal” stars. Here we concentrate on a careful derivation of fundamental parameters of a well selected sample of 27 “normal” B stars in nearby OB associations and in the field.
Nieva, M., Przybilla, N.
openaire +2 more sources
Fundamental parameters and infrared excesses of Hipparcos stars
Royal Astronomical Society. Monthly Notices, 2012 We derive the fundamental parameters (temperature and luminosity) of 107 619 Hipparcos stars and place these stars on a true Hertzsprung-Russell diagram. This is achieved by comparing BT-Settl model atmospheres to spectral energy distributions (SEDs) created from Hipparcos, Tycho, SDSS, DENIS, 2MASS, MSX, AKARI, IRAS and WISE data. We also identify and
Mcdonald, I. +2 more
openaire +3 more sources
Fundamental parameters of Ap-star HD 108662
, 2020 8 pages, 5 figures, accepted for publication in INASAN Science ...
Romanovskaya, A. M. +2 more
openaire +2 more sources