Changes and Absorption Features in the Ultraviolet Spectrum of the PG 1159-Type Central Star RX J2117+3412

Details Changes and Absorption Features in the Ultraviolet Spectrum of the PG 1159-Type Central Star RX J2117+3412 Changes and Absorption Features in the Ultraviolet Spectrum of the PG 1159-Type Central Star RX J2117+3412

Mar 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apj...513..947f&link_type=abstract

The Astrophysical Journal, Volume 513, Issue 2, pp. 947-955.

Astronomy and Astrophysics

Astronomy

5

Stars: Individual: Alphanumeric: Rx J2117+3412, Ultraviolet: Stars

Scientific paper

Comparison of IUE high- and low-dispersion spectra for the PG 1159-type central star of RX J2117+3412 indicates that the stellar continuum level and some absorption features decreased between 1993 and 1995. These observed changes may represent a new phenomenon not previously known to occur in PG 1159-type DO degenerates. The definite detection of O V lambda1371 in co-added 1993 IUE spectra suggests that T_eff for the star may have been even higher than 170,000 K in 1993. Radial velocities and equivalent widths were measured for more than 60 photospheric and circumstellar/interstellar features, some of which are compared with published data obtained from HST GHRS and IUE.

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