Results 11 to 20 of about 1,027 (203)

Detection of Four Intermediate-mass Stars with Cool Companions in Low Mass Ratio Eclipsing Binaries

open access: goldThe Astrophysical Journal
According to the core fragmentation and dynamical capture theories of binary formation, binaries tend to form with nearly equal masses. The detection of intermediate-mass binaries with low mass ratios challenges these theories, as such binaries may form ...
Linfeng Chang   +3 more
doaj   +2 more sources

New eclipsing binaries with mercury–manganese stars [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society: Letters, 2021
ABSTRACT Eclipsing binary stars are rare and extremely valuable astrophysical laboratories that make possible precise determination of fundamental stellar parameters. Investigation of early-type chemically peculiar stars in eclipsing binaries provides important information for understanding the origin and evolutionary context of their ...
O Kochukhov   +3 more
openaire   +3 more sources

Eclipsing Systems with Pulsating Components (Types β Cep, δ Sct, γ Dor or Red Giant) in the Era of High-Accuracy Space Data

open access: yesGalaxies, 2021
Eclipsing systems are essential objects for understanding the properties of stars and stellar systems. Eclipsing systems with pulsating components are furthermore advantageous because they provide accurate constraints on the component properties, as well
Patricia Lampens
doaj   +1 more source

The BINSYN Program Package [PDF]

open access: yesJournal of Astronomy and Space Sciences, 2012
The BINSYN program package, recently expanded to calculate synthetic spectra of cataclysmic variables, is being further extended to include synthetic photometry of ordinary binary stars in addition to binary stars with optically thick accretion disks ...
Albert P. Linnell
doaj   +1 more source

A New Catalog of Am-type Chemically Peculiar Stars Based on LAMOST

open access: yesThe Astrophysical Journal Supplement Series, 2023
A total of about 21,600 Am candidates were detected with the MKCLASS code based on the low-resolution spectra of the Large Sky Area Multi-Object Fiber Spectroscopic Telescope Data Releases 8 (v1.0), 9 (v0), and 10 (v0), which greatly expands the database
Xiao-man Tian   +3 more
doaj   +1 more source

NY Bootes: An Active Deep and Low-mass-ratio Contact Binary with a Cool Companion in a Hierarchical Triple System

open access: yesThe Astrophysical Journal, 2023
The first detailed photometric and spectroscopic study of G-type short-period binary NY Boo is presented. The radial velocity curve was obtained by the cross-correlation function (CCF) method based on LAMOST and SDSS spectra, which derived its mass ratio
Fangbin Meng   +5 more
doaj   +1 more source

The Eclipses of the Close Binary Star BE UMa [PDF]

open access: yesInternational Astronomical Union Colloquium, 1996
BE UMa is a close binary star, not transferring mass, with an extremely hot primary star irradiating the inner face of the cool secondary star. The light curve shows a large-amplitude, sinusoidal variation with a period of 2.29 d, and an eclipse that is centered on the minimum of the variation [1], [3].
E. Zhang   +2 more
openaire   +2 more sources

The Evolution of Compact Binary Star Systems [PDF]

open access: yesLiving Reviews in Relativity, 2014
Konstantin A Postnov
exaly   +2 more sources

Mass-Accreting Pulsating Components of Algols

open access: yesGalaxies, 2022
We present a review of the latest results of studies of the class of mass-accreting pulsating components of semi-detached eclipsing binaries known as oEA stars.
David Mkrtichian   +5 more
doaj   +1 more source

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