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- W2023543065 abstract "view Abstract Citations (117) References (57) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Ultraviolet observations of hot stars with circumstellar dust shells. Sitko, M. L. ; Savage, B. D. ; Meade, M. R. Abstract Absolute fluxes over the wavelength range 1200-3200 A are presented for 13 normal early-type stars and 12 early-type stars known to have large IR excess; the data were obtained to study the UV spectral modifications produced by absorbing circumstellar dust particles. It is found that all the Be/shell stars whose spectral types are later than B6 exhibit greatly enhanced line absorption due to circumstellar Fe II. The circumstellar gaseous line absorption in stars cooler than B6 severely complicates the study of circumstellar dust absorption. However, those B and A stars that exhibit the circumstellar 9.7-micron emission feature have a very large increase in circumstellar absorption for 1800 A; such absorption is expected from circumstellar silicate particles. Publication: The Astrophysical Journal Pub Date: May 1981 DOI: 10.1086/158909 Bibcode: 1981ApJ...246..161S Keywords: Early Stars; Hot Stars; Infrared Stars; Stellar Envelopes; Ultraviolet Astronomy; Ultraviolet Spectra; A Stars; Absorption Spectra; B Stars; Cosmic Dust; Emission Spectra; Infrared Radiation; Interstellar Extinction; Line Spectra; Nebulae; Shell Stars; Stellar Radiation; Stellar Spectra; Astronomy full text sources ADS | data products SIMBAD (25) MAST (1) INES (1)" @default.
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- W2023543065 date "1981-05-01" @default.
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- W2023543065 title "Ultraviolet observations of hot stars with circumstellar dust shells" @default.
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