Results 1 to 10 of about 9,614 (265)
The Astrophysics of Emission-Line Stars [PDF]
Astrophysics and Space Science Library, 2007 Tomokazu Kogure, Kam-Ching Leung
exaly +2 more sources
A Study of Emission Lines in Carbon Stars
The Astrophysical JournalCarbon stars are chemically peculiar stars with high carbon abundance, showing strong carbon molecule bands and rare emission lines in their spectra. This paper explores the stellar activity of carbon stars by identifying emission line features in their ...
Lichan Zhou +5 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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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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A photometric catalogue of southern emission-line stars [PDF]
Astronomy & Astrophysics, 2001 We present a catalogue of previously unpublished optical and infrared photometry for a sample of 162 emission-line objects and shell stars visible from the southern hemisphere. The data were obtained between 1978 and 1997 in the Walraven (WULBV), Johnson/Cousins (UBV(RI)_c) and ESO and SAAO near-infrared (JHKLM) photometric systems.
de Winter, D. +7 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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Rapid Variability of H α Emission Line in Be Stars [PDF]
Symposium - International Astronomical Union, 1994 We have initiated an observational campaign on some bright Be stars in order to investigate the rapid variability in emission lines using a Fabry-Perot spectrometer(λ/δλ = 104; FSR = 21.3Å) at the Nasmyth focus of the 1.22 m JRO telescope at Hyderabad, India. The PMT dark counts were 1 – 2sec-1. Here we report our first observations on four stars.
B. G. Anandarao +3 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
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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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