Results 1 to 10 of about 199,190 (345)
Spectroscopic survey of emission-line stars – I. B[e] stars [PDF]
Monthly Notices of the Royal Astronomical Society, 2015 15 pages, 7 figures, accepted for publication in ...
Aret, Anna +2 more
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Modelling emission lines in star-forming galaxies [PDF]
Monthly Notices of the Royal Astronomical Society, 2021 ABSTRACT We present a new model to compute the luminosity of emission lines in star-forming galaxies and apply this in the semi-analytical galaxy formation code galform. The model combines a pre-computed grid of H II region models with an empirical determination of how the properties of H II regions depend on the macroscopic properties ...
C M Baugh +3 more
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The Weak Emission Line Stars [PDF]
Symposium - International Astronomical Union, 2003 In this paper, we study the evolution of the weak emission line central stars of planetary nebula (WELS), which are similar to the H-deficient Wolf-Rayet central stars except for systematically weaker emission lines. Our attempts at finding an evolutionary sequence for the WELS similar to what was established for Wolf-Rayet central stars, were ...
Jeffrey Fogel +2 more
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The atypical emission-line star Hen 3-209 [PDF]
Monthly Notices of the Royal Astronomical Society, 2006 6p, 5 fig, accepted for publication in MNRAS (www.blackwell-synergy.com)
Nazé, Yaël +5 more
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Infrared Lines in Peculiar Emission-Line Stars [PDF]
Symposium - International Astronomical Union, 1976 An image-tube Cassegrain spectrograph, equipped with an S-1 photocathode enabled us to obtain infrared spectra of peculiar emission-line objects, as V 1016 Cyg, HBV 475, HD 51585, HD 45677, XX Oph and CI Cyg. Many of these objects display emission lines of H I, He I, He II, O I, N I, Ca II [S II] [S III], [Fe II].
Y. Andrillat, L. Houziaux
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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
doaj +1 more source
A representative sample of Be stars III: H band spectroscopy [PDF]
, 1999 We present H band (1.53 - 1.69 micron) spectra of 57 isolated Be stars of spectral types O9-B9 and luminosity classes III,IV & V. The HI Brackett (n-4) series is seen in emission from Br 11-18, and FeII emission is also apparent for a subset of those ...
Clark +19 more
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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
doaj +1 more source
UV line emission of symbiotic stars [PDF]
International Astronomical Union Colloquium, 1982 AbstractGeneral characteristics of emission line spectra from symbiotic stars are outlined. Data from some special line ratios in the 1000 Å - 3000 Å range, and others connecting the visual and the far UV lines are presented, and their application to symbiotic stars is discussed.
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Unveiling extremely veiled T Tauri stars [PDF]
, 2008 Photospheric absorption lines in classical T Tauri stars (CTTS) are weak compared to normal stars. This so-called veiling is normally identified with an excess continuous emission formed in shock-heated gas at the stellar surface below the accretion ...
Basri +29 more
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