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
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
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
Fundamental Parameters of four Massive Eclipsing Binaries in Westerlund 1 [PDF]
, 2011 We present fundamental parameters of 4 massive eclipsing binaries in the young massive cluster Westerlund 1. The goal is to measure accurate masses and radii of their component stars, which provide much needed constraints for evolutionary models of ...
A. Z. Bonanos +42 more
core +3 more sources
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
The Astronomical Journal, 2023 Noting the weakest modulation and relatively high metal abundance of the ab-type RR Lyrae star V838 Cyg, we collected the photometric data of this star from several sky surveys to carry out an in-depth analysis. The O − C diagram shows that the pulsation
L.-J. Li +3 more
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From Solar to Stellar Brightness Variations: The Effect of Metallicity
, 2018 Context. Comparison studies of Sun-like stars with the Sun suggest an anomalously low photometric variability of the Sun compared to Sun-like stars with similar magnetic activity.
Krivova, N. A. +4 more
core +1 more source
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 +10 more
semanticscholar +1 more source
Fundamental parameters of bright Ap stars from wide-range energy distributions and advanced atmospheric models [PDF]
, 2012 Aims. As a well-established procedure for the vast majority of normal main-sequence stars, determination of atmospheric and stellar parameters turns to be a challenging process in case of magnetic chemically peculiar stars.
D. Shulyak, T. Ryabchikova, O. Kochukhov
semanticscholar +1 more source
Photometric Calibrations of M-dwarf Metallicity with Markov Chain Monte Carlo and Bayesian Inference
The Astrophysical Journal, 2023 Knowledge of stellar atmospheric parameters ( T _eff , $\mathrm{log}g$ , [Fe/H]) of M dwarfs can be used to constrain both theoretical stellar models and Galactic chemical evolutionary models, and guide exoplanet searches, but their determination is ...
C. Duque-Arribas +5 more
doaj +1 more source