Discoveries of 3 K-Shell Lines of Iron and a Coherent Pulsation of 593s from SAX J1748.2-2808
Abstract
SAX J1748.2-2808 is a unique X-ray object with a flat spectrum and strong emission lines at 6.4--7.0keV. The Suzaku satellite resolved the emission lines into 3 K-shell lines from neutral and highly ionized irons. A clear coherent pulsation with a period of 593s was found from the Suzaku and XMM-Newton archives. These facts favor that SAX J1748.2-2808 is an intermediate polar, a subclass of a magnetized white dwarf binary (cataclysmic variable). This paper reports on details of the findings, and discusses the origin of this source.
- Publication:
-
Publications of the Astronomical Society of Japan
- Pub Date:
- January 2009
- DOI:
- 10.1093/pasj/61.sp1.S93
- arXiv:
- arXiv:0805.3608
- Bibcode:
- 2009PASJ...61S..93N
- Keywords:
-
- Galaxy: center;
- stars: cataclysmic variables;
- stars: individual (SAX J1748.2-2808);
- Astrophysics
- E-Print:
- 7 pages, 8 figures, Submitted to PASJ on 2008, May 19, Accepted on 2008, June 22