Correlated variability in the X-ray and Hα emission from the O4If supergiant ζ Puppis.

Details Correlated variability in the X-ray and Hα emission from the O4If supergiant ζ Puppis. Correlated variability in the X-ray and Hα emission from the O4If supergiant ζ Puppis.

Feb 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26a...306..899b&link_type=abstract

Astronomy and Astrophysics, v.306, p.899

Astronomy and Astrophysics

Astrophysics

36

Stars: Supergiants, Stars: Early Type, Stars: Mass Loss, X-Rays: Stars, Stars: Individual: {Zeta} Puppis

Scientific paper

The Position Sensitive Proportional Counter (PSPC) onboard the ROSAT satellite was used to monitor ζ Pup for 56651seconds spread over 11days in 1991 October. During the first 8days, 592 high-resolution Hα profiles were also obtained simultaneously. In a detailed time series analysis we investigate the X-ray observations and the Hα line profiles for variability. We find a 1.44c/d (cycles/day) modulation both in the Hα line profiles as well as in the X-ray band pass between 0.9 and 2.0keV; the amplitude of the X-ray variability amounts to +/-6%. Thus, our observations provide evidence for periodic variations in the wind density at the base of the wind of ζ Pup.

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