A strong and broad Fe line in the XMM-Newton spectrum of the new X-ray transient and black hole candidate XTEJ1652-453

作者：Hiemstra Beike^*; Mendez Mariano; Done Chris; Diaz Trigo Maria; Altamirano Diego; Casella Piergiorgio

来源：Monthly Notices of the Royal Astronomical Society, 2011, 411(1): 137-150.

DOI：10.1111/j.1365-2966.2010.17661.x

• accretion, accretion discs
• black hole physics
• stars: individual: XTEJ1652-453
• X-rays: binaries

We observed the new X-ray transient and black hole candidate XTEJ1652-453 simultaneously with XMM-Newton and the Rossi X-ray Timing Explorer (RXTE). The observation was done during the decay of the 2009 outburst, when XTEJ1652-453 was in the hard-intermediate state. The spectrum shows a strong and broad Fe emission line with an equivalent width of similar to 450 eV. The profile is consistent with that of a line being produced by reflection off the accretion disc, broadened by relativistic effects close to the black hole. The best-fitting inner radius of the accretion disc is similar to 4 gravitational radii. Assuming that the accretion disc is truncated at the radius of the innermost stable circular orbit, the black hole in XTEJ1652-453 has a spin parameter of similar to 0.5. The power spectrum of the RXTE observation has an additional variability component above 50 Hz, which is typical for the hard-intermediate state. No coherent quasi-periodic oscillations at low frequency are apparent in the power spectrum, which may imply that we view the system at a rather low inclination angle.

• 出版日期2011-2