Searching for X-ray variability/periodicity in HD 4004.

Details Searching for X-ray variability/periodicity in HD 4004. Searching for X-ray variability/periodicity in HD 4004.

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996rftu.proc...73w&link_type=abstract

International Conference on X-ray Astronomy and Astrophysics: Röntgenstrahlung from the Universe, p. 73 - 74

Astronomy and Astrophysics

Astrophysics

3

Wolf-Rayet Stars: X-Ray Variations, Wolf-Rayet Stars: Stellar Spectra, Wolf-Rayet Stars: Line Profiles

Scientific paper

The authors present preliminary results of a combined X-ray and optical search for variability/periodicity in HD 4004 (WR 1, WN5-s), an apparently single Wolf-Rayet star known to show radial velocity variations (Lamontagne 1983) and some variability both in photometry (Moffat and Shara 1986) and in optical line profiles (Niedzielski 1995). The two ROSAT PSPC pointed observations of HD 4004 (total effective exposure time of 35 ks) do not provide significant evidence for variability in X-rays. Line profile variations present in newly obtained optical spectra are similar to those of EZ CMa (WR 6, WN5-s+c?), the banner WR+compact companion candidate.

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