From the 1 of 9 linked papers with an AI index.
9 papers
CW Cas: A solar-type contact binary system with an unseen third companion in a hierarchical quadruple system
Matekov Azizbek, Azizbek Matekov, Zhu Liying +25
We present a comprehensive multiband photometric and spectroscopic study of the G-type binary CW Cas whose parameters have not been well determined. Our double-lined spectroscopic…
First double red giant Algol system with active mass transfer
Mikhail Kovalev, Hailiang Chen, Sufen Guo +7
Double red giant stars are very important for studies of the stability of mass transfer, common-envelope evolution, and the formation of double white dwarfs with short orbital peri…
Search for double-line spectroscopic binaries in RAVE survey
Mikhail Kovalev
The paper analyzes RAVE survey spectra to identify double-line spectroscopic binaries using a composite spectral model, finding 2,813 composite spectra across 2,605 targets and val…
Shortest period for outer orbit in compact hierarchical triple? Discovery of SB1 around V0885 Per
Mikhail Kovalev
I present a discovery of SB1 in the LAMOST-MRS spectra of eclipsing contact binary V 885 Per. Spectroscopic orbit has period only day, which will make it shortest known ou…
Spectroscopic orbits for three SB2s and one hierarchical triple using SALT data
Mikhail Kovalev, Alexey Kniazev, Oleg Malkov
We confirmed four spectroscopic binary candidates using new observations obtained with SALT. Three SB2 systems (HD 20784, HD 43519A, HD 62153A) exhibit circular orbits with periods…
Identification of false positive double-lined spectroscopic binaries in LAMOST-MRS data due to moonlight contamination
Zhoulin Wang, Mikhail Kovalev, Jianping Xiong +2
We present a method for identifying false positive double-lined spectroscopic binary (SB2) candidates by analysing medium-resolution survey spectra from the Large Sky Area Multi-Ob…