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Time Domain Astronomy Case: Use of Large Photometric Surveys for Study of Variable Stars
AbstractLong-period eclipsing binaries (variables) are a valuable source of data for calculating stellar masses. Such objects have a sufficient...
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Revised Version of the New Catalogue of Suspected Variable Stars, NSV Release 2
AbstractWe present NSV Release 2, an electronic version of the “New Catalogue of Suspected Variable Stars”. A detailed file-by-file description of...
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Catalog
E. Hertzsprung was born near Copenhagen (Denmark) in 1873. He studied in technical colleges and became a chemical engineer, working for a while in...
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TYC 1417-891-1 and TYC 1478-742-1: Eclipsing Variable Stars. The Gaia EDR3 and TESS Photometric Data
Based on the TESS (Transiting Exoplanet Survey Satellite) phase dependent light curves, we confirm the eclipsing type variability nature for two...
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The Digitized First Byurakan Survey Data Base. Late-Type Stars Candidates. New Confirmations. I
The Digitized First Byurakan Survey (DFBS) is the digitized version of the First Byurakan Survey (FBS, or Markarian survey). The FBS was the first...
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Detection of AGNs and Quasars with Significant Proper Motions Based on Gaia Data in the SRG/eROSITA Catalog of X-ray Sources
AbstractBased on a comparison of the SRG/eROSITA catalog of X-ray active stars and the Gaia catalog, we have obtained a sample of 502 peculiar...
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The Digitized First Byurakan Survey Database Late-Type Stars Candidates. New Confirmations. II
Three new carbon C stars was confirmed among the sample of the Late-Type Stars candidates, selected on the Digitized First Byurakan Survey (DFBS)...
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Contribution of population III stars to merging binary black holes
A large number of mergers of binary black holes (BHs) have been discovered by gravitational wave observations since the first detection of...
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Catalog
Details of this object appear in J. Kepler’s Tomi Primi Ephemeridvm Iohannes Kepleri Pars Secvnda, which was published in 1630 and was translated by...
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Periodicity of Flare Frequency of Active Flare Stars Detected by Tess
Data from the TESS orbital observatory are used to study the most active flare stars indicating 100 or more flares during the period from July 2018...
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Mass Computations of the Brightness of Stars in an Arbitrary Spectral Band
AbstractThe problem of calculating the brightness of an array of stars in an arbitrary photometric band, which is not the standard band of...
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Distribution of Young Spectroscopic Binary Stars by Mass Ratio and Eccentricity
AbstractData were collected on 83 young double-lined spectroscopic binary stars, among them—Herbig Ae/Be stars, T Tauri stars and red dwarfs....
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Isolated Neutron Stars
Non-accreting neutron stars display diverse characteristics, leading us to classify them into several groups. This chapter is an observational driven...
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Isolated Neutron Stars
Non-accreting neutron stars display diverse characteristics, leading us to classify them into several groups. This chapter is an observational driven...
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Photometric and Spectral Studies of the Group of Galactic Wolf-Rayet Stars. I. WN Sequence
Photometric and spectral observations of 11 Wolf-Rayet stars of the WN sequence were made at the AFIF during 2021-2022. Estimates of the brightness...
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Herbig-Haro Flows and Young Stars in the Dobashi 5006 Dark Cloud
Two new Herbig-Haro flows were found in a study of the isolated Dobashi 5006 dark cloud (l = 216°.7, b = –13°.9): one certain (HH 1179) and one...
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Parameters and the Eddington pulsation constant of Galactic RRab stars
For Galactic RRab stars 121 empirical and semiempirical metallicity–absolute magnitude relations known since 1990 are analyzed. For these variables,...
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Discovery of New δ Scuti Stars
Abstract —Pulsating stars are remarkable objects for stellar astrophysics. Their pulsation frequencies allow us to probe the internal structure of...
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Close Binary Stars. IX: Statistical Studies of Close Binary Systems
AbstractThe article considers a variety of close binary systems (CBSs) and describes their classification. Statistical dependences between the main...
