Document 
| Abstract | PDF (107 KB) | PS (235 KB) | References | HTML | Simbad Objects | NASA ADS Abstract Service |
Free access article
A&A 407, L63-L66 (2003)
DOI: 10.1051/0004-6361:20031053
Letter
X-ray rotational modulation of a supersaturated star in IC 2391
A. Marino1, G. Micela2, G. Peres1 and S. Sciortino21 Dipartimento di Scienze Fisiche e Astronomiche, Sez. di Astronomia, Università di Palermo, Piazza del Parlamento 1, 90134 Palermo, Italy
2 INAF - Osservatorio Astronomico di Palermo G.S. Vaiana, Piazza del Parlamento 1, 90134 Palermo, Italy
(Received 7 April 2003 / Accepted 8 July 2003 )
Abstract
We present evidence of X-ray rotational modulation
on VXR45, a young fast rotator star, member of IC 2391.
It is a dG9 spectral type star whose rotational period and
X-ray luminosity make it a supersaturated star.
Our X-ray observation, made with EPIC/PN on XMM-Newton, covers about
two photometric rotational periods.
The detection of X-ray rotational modulation implies the presence of structural inhomogeneities.
Possible interpretations are presented and discussed.
Key words: open clusters and associations -- stars: individual: IC 2391 -- stars: coronae -- stars: late-type -- stars: rotation -- X-ray: stars
Offprint request: A. Marino, marino@astropa.unipa.it
SIMBAD Objects
© ESO 2003