Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-05-11
Astrophys.J. 614 (2004) 358-362
Astronomy and Astrophysics
Astrophysics
AASTeX preprint, 13 Pages, 3 Figures, 2 Tables. Version accepted for the Astrophysical Journal
Scientific paper
10.1086/423615
We report on CHANDRA ACIS observations of the ultracompact AM CVn binary ES Cet. This object has a 10.3 minute binary period and is the most compact of the confirmed AM CVn systems. We have, for the first time, unambiguously detected the X-ray counterpart to ES Cet. In a 20 ksec ACIS-S image a point-like X-ray source is found within 1'' of the catalogued optical position. The mean countrate in ACIS-S is 0.013 cts/s, and there is no strong evidence for variability. We extract the first X-ray spectrum from ES Cet, and find that it is not well described by simple continuum models. We find suggestive evidence for discrete spectral components at about 470 and 890 eV, that can be modelled as gaussian emission lines. In comparison with recent X-ray detections of nitrogen and neon in another AM CVn system (GP Com), it appears possible that these features may represent emission lines from these same elements; however, deeper spectroscopy will be required to confirm this.
No associations
LandOfFree
CHANDRA Detection of the AM CVn binary ES Cet (KUV 01584-0939) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with CHANDRA Detection of the AM CVn binary ES Cet (KUV 01584-0939), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and CHANDRA Detection of the AM CVn binary ES Cet (KUV 01584-0939) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-672305