Broadband X-ray study of the galactic black hole binary 4U 1630-47 with Suzaku

T. Hori, Y. Ueda, C. Done, M. Shidatsu, T. Kawamuro, Aya Kubota, S. Nakahira

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1 Citation (Scopus)


We present the results from our Suzaku observations of the Galactic black hole binary 4U 1630-47. 4U 1630-47 was observed in the very high state (VHS) during the 2012 September-October outburst. The inner disk appears slightly truncated by comparison with a previous high/soft state (HSS) of this source, even by taking into account energetic coupling between the disk and corona. The 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 ions. We also observed 4U 1630-47 in the HSS simultaneously with Suzaku and NuSTAR in an early epoch of the 2015 outburst. All Suzaku spectra in the HSS show variable iron-K absorption line features. We find that the ionization state of the disk wind rapidly increased when the continuum showed significant spectral hardening. This behavior is consistent with that expected from a thermally driven wind.

Original languageEnglish
Pages (from-to)467-472
Number of pages6
JournalAstronomische Nachrichten
Issue number4-5
Publication statusPublished - 2016 May 1



  • Accretion, accretion disks
  • Black hole physics
  • X-rays: binaries
  • X-rays: individuals (4U 1630-47)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Hori, T., Ueda, Y., Done, C., Shidatsu, M., Kawamuro, T., Kubota, A., & Nakahira, S. (2016). Broadband X-ray study of the galactic black hole binary 4U 1630-47 with Suzaku. Astronomische Nachrichten, 337(4-5), 467-472.