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Title: Spectroscopy of post-AGB candidate HD 331319 (IRAS 19475+3119)
Authors: Sivarani, T
Parthasarathy, M
García, L. P
Manchado, A
Keywords: Spectroscopy of Post-AGB;HD 331319;IRAS 19475+3119
Issue Date: Aug-2001
Publisher: Kluwer Academic Publishers
Citation: Szczerba, R. and Garny, S. K., eds., Post-AGB objects as a phase of stellar evolution, Astrophysics and Space Science Library, Vol. 265, Proceedings of the Torun Workshop held July 5 - 7, 2000, pp. 301 - 304
Series/Report no.: Astrophysics and Space Science Library;Vol. 265
Abstract: HD 331319 is a F3 Ib star with a detached cold circumstellar dust shell with far-IR colours similar to planetary nebulae. From an analysis of high resolution spectra using LTE stellar atmospheric models, we have derived the atmospheric parameters and the chemical composition of HD 331319. By matching the theoretical and the observed spectrum we obtained Teff = 7500K, log g = 0.5 and xit = 7 kms-1 and estimated [C/Fe] = 0.4 +/- 0.3, [N/Fe] = 1.4 +/- 0.5, [O/H] = 0.3 +/- 0.3, [Fe/H] = -0.2 +/- 0.3 We find that nitrogen is overabundant, oxygen and iron are nearly solar. The total C,N,O abundances with respect to iron indicate mixing due to the third dredge-up.
Description: Restricted Access
ISBN: 0-7923-7145-3
Appears in Collections:IIAP Publications

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