Results 1 to 10 of about 10,060 (266)
HYDROGEN LINES IN B-e STARS ENVELOPES
Odessa Astronomical Publications, 2017 The investigation of Balmer Hα and Hb line profiles for 28 Be and Be-shell stars have been carried out. The emission profiles of stars were obtained by subtracting from “A Be star atlas” photospheric line profiles which were computed from Kurucz models ...
S. N. Udovichenko, E. I. Konchagina
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Journal of Mathematical and Fundamental Sciences, 2019 Hα line variations of 8 B-emission (Be) stars are presented. Stars that are listed in the Bright Star Catalogue were observed in 2009 at the Bosscha Observatory, Lembang, Indonesia. It was found that 4 stars showed phase changing from Be double-peaked to
Aprilia Aprilia +7 more
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THE MASSIVE STELLAR POPULATION IN THE DWARF STARBURST GALAXIES
Odessa Astronomical Publications, 2017 The analysis of the long-slit spectral observations of 39 Wolf-Rayet (WR) galaxies with heavy element mass fraction ranging over 2 orders of magnitudes from Z☉/50 to 2Z☉ are presented.
N. G. Guseva
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Physical Properties of Radio Stars Based on LAMOST Spectral Survey
Universe, 2022 Radio emission has been detected for all types of stars in the Hertzsprung Russell diagram. Large Sky Area Multi-Object Fiber Spectroscopic Telescope (LAMOST) low and medium-resolution spectroscopic surveys provide a good opportunity to obtain the ...
Liyun Zhang +6 more
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XP-TEAL: Gaia XP tool for emission and absorption lines
Astronomy & AstrophysicsContext. With Gaia’s third Data Release (DR3), low-resolution BP/RP (XP) spectra became available for more than 219 million sources. In previous work, we developed a fast method for detecting absorption and emission lines while measuring their equivalent
Malhotra S. +10 more
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Photometric and spectroscopic study of five pre-main sequence stars in the vicinity of NGC 7129 [PDF]
Serbian Astronomical Journal, 2019 We present results from long-term optical photometric and spectroscopic observations of five pre-main sequence stars, located in the vicinity of the bright nebula NGC 7129.
Semkov E.H., Ibryamov S.I., Peneva S.P.
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Gamma Cas Stars as Be+White Dwarf Binary Systems
The Astrophysical Journal Letters, 2022 The origin of the bright and hard X-ray emission flux among the γ Cas subgroup of B-emission line (Be) stars may be caused by gas accretion onto an orbiting white dwarf (WD) companion.
Douglas R. Gies +2 more
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The Orbital and Physical Properties of Five Southern Be+sdO Binary Systems
The Astronomical Journal, 2023 Close binary interactions may play a critical role in the formation of the rapidly rotating Be stars. Mass transfer can result in a mass gainer star spun up by the accretion of mass and angular momentum, while the mass donor is stripped of its envelope ...
Luqian Wang +3 more
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A Catalog of 45,206 Hα Emission-line Stars from LAMOST MRS DR7
The Astrophysical Journal Supplement SeriesStars that exhibit prominent emission lines in their spectra are referred to as emission-line stars, encompassing a wide range of stellar types and indicative of intriguing physical properties.
Lihuan Yu +4 more
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Emission activity of the Be star 60 Cygni [PDF]
Serbian Astronomical Journal, 2017 In this paper we present results of spectroscopic analysis of the H® line profile of the Be star 60 Cygni. We present time evolution of the equivalent width of the H® line profiles during years 1992 - 2016 and V=R variation during years 1995 ...
Šejnová K., Votruba V.
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