SIMBAD references

2008A&A...482..255R - Astronomy and Astrophysics, volume 482, 255-258 (2008/4-4)

The most rapidly rotating He-strong emission line star: HR7355.

RIVINIUS T., STEFL S., TOWNSEND R.H.D. and BAADE D.

Abstract (from CDS):

We searched for massive stars with Balmer emission consistent with magnetically confined circumstellar material. Archival spectroscopic and photometric data were investigated. HR7355 is a formerly unknown He-strong star showing Balmer emission. At V=6.02mag, it is one of the brightest objects simultaneously showing anomalous helium absorption and hydrogen emission. Among similar objects, only σOri E has so far been subjected to any systematic analysis of the circumstellar material responsible for the emission. We argue that the double-wave photometric period of 0.52d corresponds to the rotation period. In tandem with the high projected equatorial velocity, vsini=320km/s, this short period suggests that HR7355 is the most rapidly rotating He-strong star known to date; a class that was hitherto expected to host stars with slow to moderate rotation only.

Abstract Copyright:

Journal keyword(s): stars: emission line, Be - stars: circumstellar matter - stars: magnetic fields - stars: chemically peculiar

Simbad objects: 5

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2021.06.17-11:04:37

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