Discovery of X-ray absorption lines from the low-mass X-ray binaries 4U 1916-053 and X 1254-069 with XMM-Newton

Abstract

We report the discovery of narrow X-ray absorption features from the two dipping low-mass X-ray binary 4U 1916-053 and X 1254-690 during XMM-Newton observations. The features detected are identified with resonant scattering absorption lines of highly ionized iron (Fe XXV and Fe XXVI). Resonant absorption features are now observed in a growing number of low-mass X-ray binaries (LMXBs): the two superluminal jet sources GRS 1915+105 and GRO J1655-40, the bright LMXB GX 13+1 and the four dipping sources MXB 1658-298, X 1624-490, 4U 1916-053 and X 1254-690. The early hypothesis that their origin could be related to the presence of superluminal jets is thus ruled out. Ionized absorption features may be common characteristics of accreting systems. Furthermore, their presence may depend on viewing angle, as suggested by their detection in dippers which are viewed close to the disk plane, and by the fact that GRS 1915+105, GRO J1655-40 and GX 13+1, although not dippers, are suspected to be also viewed at high inclination.

arXiv comment6 pages. To appear in the Proceedings of the Symposium "The Restless High-Energy Universe", 5-8 May 2003, Amsterdam, The Netherlands, E.P.J. van den Heuvel, J.J.M. in 't Zand, and R.A.M.J. Wijers Eds

References in corpus (12)

• The European Photon Imaging Camera on XMM-Newton: The MOS Cameras
• Optical Observations of GRO J1655-40 in Quiescence I: A Precise Mass for the Black Hole Primary
• High resolution Chandra HETG and RXTE observations of GRS 1915+105 : A hot disk atmosphere & cold gas enriched in Iron and Silicon
• The Chandra HETGS and RXTE view of GRS 1915+105
• Erratum: ASCA Observations of the Absorption-Line Features from the Super-Luminal Jet Source GRS 1915+105
• Absorption dips in the light curves of GRO J1655-40 and 4U 1630-47 during outburst
• Discovery of narrow X-ray absorption features from the dipping low-mass X-ray binary X 1624-490 with XMM-Newton
• An XMM-Newton study of the X-ray binary MXB1659-298 and the discovery of narrow X-ray absorption lines
• Discovery of narrow X-ray absorption features from the low-mass X-ray binary X 1254-690 with XMM-Newton
• Discovery of complex narrow X-ray absorption features from the low-mass X-ray binary GX13+1 with XMM-Newton
• A Hard Tail in the Broad Band Spectrum of the Dipper XB 1254-690
• A Cessation of X-ray Dipping Activity in X1254-690

Cited by in corpus (3)

• Timing properties of XB 1254-690
• Spectral properties of MXB 1658-298 in the low/hard and high/soft state
• Long time-scale variability of X-ray binaries with late type giant companions