| Issue |
A&A
Volume 407, Number 3, September I 2003
|
|
|---|---|---|
| Page(s) | L63 - L66 | |
| Section | Letters | |
| DOI | https://doi.org/10.1051/0004-6361:20031053 | |
| Published online | 17 November 2003 | |
Letter to the Editor
X-ray rotational modulation of a supersaturated star in IC 2391
1
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
Corresponding author: A. Marino, marino@astropa.unipa.it
Received:
7
April
2003
Accepted:
8
July
2003
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
© ESO, 2003
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