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- W2000303492 abstract "view Abstract Citations (91) References (34) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS The Peculiar Supergiant HR 4049 Lambert, David L. ; Hinkle, Kenneth H. ; Luck, R. Earle Abstract New high-resolution spectra of the HR 4049, a warm supergiant with an infrared excess in the visible and near-infrared as well as the K band, are discussed. The K band spectrum shows weak absorption lines attributable to circumstellar CO. The CO lines provide an excitation temperature of 300 K and a column density of 10 to the 20th/sq cm. The chemical composition of the photosphere is derived from visible and near-infrared spectra and an LTE model atmosphere analysis. Spectroscopic indicators indicate that T(eff) is roughly 7500 K and log g is roughly 1.0. The star is very metal-poor but rich in C, N, and O. The star resembles the previously analyzed halo stars BD +39 deg 4926 and HD 46703, which appear to be evolving between the tip of the AGB and the top of the white dwarf cooling track. Publication: The Astrophysical Journal Pub Date: October 1988 DOI: 10.1086/166800 Bibcode: 1988ApJ...333..917L Keywords: Abundance; Metallicity; Peculiar Stars; Stellar Composition; Supergiant Stars; Carbon Monoxide; Extremely High Frequencies; Spectrum Analysis; Stellar Envelopes; Stellar Spectrophotometry; Astrophysics; STARS: INDIVIDUAL BRIGHT STAR NUMBER: HR 4049; STARS: SUPERGIANTS; STARS: WEAK-LINE full text sources ADS | data products SIMBAD (4)" @default.
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- W2000303492 date "1988-10-01" @default.
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- W2000303492 title "The peculiar supergiant HR 4049" @default.
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