Fundamental parameters of Galactic luminous OB stars VI. Temperatures, masses and WLR of Cyg OB2 supergiants ? [PDF]
, 2002 We have analyzed six OB supergiants and one giant covering spectral types from O3 to B1 in the Galactic OB as- sociation Cyg OB2 by means of an updated version of FASTWIND (Santolaya-Rey et al.
A. Herrero +3 more
semanticscholar +1 more source
The fundamental parameters of the Ap star 78 Virginis [PDF]
Astronomy & Astrophysics, 2015 Context. Determining the effective temperature of Ap stars, including the roAp stellar pulsators, is a difficult task owing to their strong magnetic field and their related spotted surfaces. It is, however, an important step towards constraining models of their complex atmosphere and testing proposed pulsation excitation mechanisms. Aims.
K. Perraut +13 more
openaire +3 more sources
Variability of Young Massive Stars in the Arches Cluster [PDF]
, 2010 We present preliminary results of the first near-infrared variability study of the Arches cluster, using adaptive optics data from NIRI/Gemini and NACO/VLT. The goal is to discover eclipsing binaries in this young (2.5 +- 0.5 Myr), dense, massive cluster
Alard +6 more
core +1 more source
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
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
Spectrum Analysis of Bright Kepler Gamma Doradus Candidate Stars [PDF]
, 2012 Ground-based spectroscopic follow-up observations of the pulsating stars observed by the Kepler satellite mission are needed for their asteroseismic modelling.
A. Tkachenko +42 more
core +2 more sources
Three Ultra-short-period Contact Eclipsing Binary Systems Mined from Massive Astronomical Surveys
The Astronomical Journal, 2023 We present the photometric analysis of three ultra-short-period total eclipsing binaries in contact configuration, CRTS_J172718.0+431624, OGLE-BLG-ECL-000104, and OGLE-BLG-ECL-000012, mined from massive astronomical surveys.
Athanasios Papageorgiou +5 more
doaj +1 more source
The Astrophysical Journal Letters, 2023 The detection of long-period binary stars containing a δ Scuti variable is helpful to study the formation and evolution of binaries in the intermediate-mass region.
Xin Lyu, Ming Yang
doaj +1 more source
Spectroscopic and physical parameters of Galactic O-type stars. II. Observational constraints on projected rotational and extra broadening velocities as a function of fundamental parameters and stellar evolution [PDF]
, 2013 Rotation is of key importance for the evolution of hot massive stars, however, the rotational velocities of these stars are difficult to determine. Based on our own data for 31 Galactic O stars and incorporating similar data for 86 OB supergiants from ...
N. Markova +7 more
semanticscholar +1 more source
Investigation of a W UMa-type contact binary GZ And in a physical triple system
Frontiers in Astronomy and Space SciencesGZ And is a variable star within the visually observed multiple-star system ADS 1693. Recent observations have yielded new light curves for GZ And, obtained using the Xinglong 85-cm telescope and the Transiting Exoplanet Survey Satellite (TESS) satellite.
Lin-Qiao Jiang +3 more
doaj +1 more source