Results 31 to 40 of about 9,445 (119)
Emission-line stars in the LMC: the Armagh survey and a metacatalogue [PDF]
Astronomy & Astrophysics, 2013 [Aims] Accurate astrometry is required to reliably cross-match 20th-century photographic catalogues against 21st-century digital surveys. The present work provides modern-era identifications and astrometry for the 801 emission-line objects "of stellar appearance" in the Armagh survey (the largest of its nature to date).
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On the Interpretation of the Emission Lines in Stars of Early Spectral Class
The Astrophysical Journal, 1932 The emission-line spectra.-The presence of bright Fe II in the spectra of Be stars suggests that lines of other elements requiring similar conditions of excitation may also be present. A search in the spectra of several stars yielded definite evidence of the presence of Mg II and Si II; Sc II, Cr II, and Ni II are probably present; forbidden Fe II is ...
Struve, Otto, Swings, Polydore
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HdBe stars: hydrogen-deficient supergiants with emission lines [PDF]
Symposium - International Astronomical Union, 1994 The hydrogen-deficient B stars (often known as extreme-helium stars: EHes) show weak or absent Balmer lines and the following properties (Heber 1986a): Teff ~ 12 − 25kK, log g ~ 2 − 3, log nH ~ −3 − −4, nHe ≈ 0.99, nC ~ 0.01. Their galactic positions and apparent magnitudes indicate that they are low-mass supergiants belonging to the Galactic bulge ...
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Observations of southern emission-line stars
The Astrophysical Journal Supplement Series, 1976 A catalog of 1929 stars showing H-alpha emission on photographic plates is presented which covers the entire southern sky south of declination -25 deg to a red limiting magnitude of about 11.0. The catalog provides previous designations of known emission-line stars equatorial (1900) and galactic coordinates, visual and photographic magnitudes, H-alpha ...
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A Study of Emission Lines in Carbon Stars
The Astrophysical JournalAbstract Carbon 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 spectra.
Lichan Zhou +5 more
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The Gaia satellite: a tool for Emission Line Stars and Hot Stars
, 2008 The Gaia satellite will be launched at the end of 2011. It will observe at least 1 billion stars, and among them several million emission line stars and hot stars. Gaia will provide parallaxes for each star and spectra for stars till V magnitude equal to 17.
Martayan, C. +21 more
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The Astrophysics of Emission-Line Stars [PDF]
, 2007 Tomokazu Kogure, Kam-Ching Leung
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Properties of Regions Forming the FeII Emission Lines in Be Stars
, 2005 We study FeII and Balmer hydrogen emission lines observed simultaneously of 18 southern Be stars. We use the self-absorption-curve method (SAC) to determine the optical depth regime of FeII emission lines and to derive first insights on the physical properties of their forming regions.
Arias, Maria Laura +3 more
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Polarimetry in the Emission Lines of Shell Stars [PDF]
Monthly Notices of the Royal Astronomical Society, 1974 V. George, S. J. Coyne, P. J. Treanor
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Red novae, their progenitors, and remnants. [PDF]
Astron Astrophys RevKamiński T, Blagorodnova N.
europepmc +1 more source