X-ray rotational modulation of a supersaturated star in IC 2391
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.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- August 2003
- DOI:
- 10.1051/0004-6361:20031053
- arXiv:
- arXiv:astro-ph/0307170
- Bibcode:
- 2003A&A...407L..63M
- Keywords:
-
- open clusters and associations;
- stars: individual: IC 2391;
- stars: coronae;
- stars: late-type;
- stars: rotation -\ X-ray: stars;
- Astrophysics
- E-Print:
- 4 pages with 4 PostScript figures. Accepted for publication in Astronomy &