X-Ray Discovery of a Hot PG1159 Star, RX J0122.9-7521

Details X-Ray Discovery of a Hot PG1159 Star, RX J0122.9-7521 X-Ray Discovery of a Hot PG1159 Star, RX J0122.9-7521

Oct 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995pasp..107..927c&link_type=abstract

Publications of the Astronomical Society of the Pacific, v.107, p.927

Astronomy and Astrophysics

Astronomy

11

X-Rays: Stars, Stars: Oscillations

Scientific paper

The supersoft X-ray source RX J0122.9-7521 has been optically identified with an extremeley hot PG1159 star. Its spectrum shows high excitation emission lines from which we estimate Teff ~140,000K and log g~7. Limited photometry taken during six nights shows no conclusive variability, but we cannot rule out short-period, low-amplitude pulsations (P<5 min) as are found in some PG1159 stars. There is some evidence for variations in the emission-line strengths, but higher quality spectra are needed to confirm this. (SECTION: Stars)

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