Broadband X-ray Study of the Galactic Black Hole Binary 4U 1630-47 with Suzaku
Abstract
We present the results from an X-ray observation of the Galactic black hole binary 4U 1630--47 in the very high state performed with Suzaku in the 2012 September-October outburst. The continuum is well described with a multicolor disk and its Comptonized components by thermal and nonthermal electrons. The inner disk appears slightly truncated by comparison with a previous high/soft state of this source, even by taking into account energetic coupling between the disk and corona. Our X-ray spectra do not show the Doppler-shifted emission lines indicating baryonic jets that were seen four days previously in an XMM-Newton observation, despite the source being in a similar state. There are no significant absorption lines from highly ionized iron lines as were seen in the previous high/soft state data. We show that the increased source luminosity is not enough on its own to make the wind so highly ionized as to be undetectable, indicating that the disk wind has changed in terms of its launch radius and/or density compared to the high/soft state. We will also report the results of simultaneous Suzaku and NuSTAR observations of 4U 1630--47 made in an early epoch of the 2015 outburst.
- Publication:
-
The Extremes of Black Hole Accretion
- Pub Date:
- July 2015
- Bibcode:
- 2015ebha.confE..38H