EDP Sciences
Free Access
Volume 383, Number 2, February IV 2002
Page(s) 568 - 573
Section Formation, structure and evolution of stars
DOI https://doi.org/10.1051/0004-6361:20011745

A&A 383, 568-573 (2002)
DOI: 10.1051/0004-6361:20011745

The Galactic Centre source IRS 13E: A post-LBV Wolf-Rayet colliding wind binary?

R. F. Coker1, J. M. Pittard1 and J. H. Kastner2

1  Department of Physics and Astronomy, University of Leeds, Leeds LS2 9JT, UK
2  Chester F. Carlson Centre for Imaging Science, Rochester Institute of Technology, 54 Lomb Memorial Drive, Rochester, NY 14623, USA

(Received 19 October 2001 / Accepted 6 December 2001)

IRS 13E is an infrared, mm and X-ray source in the Galactic Centre. We present the first Chandra X-ray spectrum for IRS 13E and show that it is consistent with a luminous and highly absorbed X-ray binary system. Since the X-ray luminosity is too large for a solitary star, our interpretation is that of an early-type long-period binary with strong colliding winds emission. This naturally explains the observed X-ray spectrum and count rate as well as its lack of significant short term variability. Due to the short lifetime of any nebula 0.2 pc from the putative central super-massive black-hole, we argue that the primary of IRS 13E has exited the LBV phase in the last few thousand years.

Key words: X-rays: stars -- stars: Wolf-Rayet -- stars: individual: IRS 13E

Offprint request: R. F. Coker, robc@ast.leeds.ac.uk

SIMBAD Objects

© ESO 2002

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.