Astronomy and Astrophysics – Astronomy
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989aj.....97.1440l&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 97, May 1989, p. 1440-1450. Research supported by NSERC.
Astronomy and Astrophysics
Astronomy
18
Carbon, Nitrogen, Oxygen, Stellar Spectra, White Dwarf Stars, Absorption Spectra, Photosphere, Stellar Atmospheres, Stellar Oscillations, Ultraviolet Spectra
Scientific paper
High-resolution and low-resolution UV spectra and a high-resolution optical spectrum were obtained for PG 1159-035, revealing apparent photospheric absorption features with defined cores from N V 1240 A, N IV 1270 A, O V 1371 A, and C IV 1550 A. The photospheric velocity derived using all of these lines except for C IV is about +35 km/s. Equivalent-width measurements determined for all of the features may provide a tighter constraint on the photospheric temperature in a detailed model atmosphere analysis treating the CNO ions.
Husfeld Dirk
Liebert James
Sion Edward M.
Starrfield Sumner G.
Wehrse Rainer
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