Suzaku wide-band observations of black-hole binaries and AGNs: Continuum and Fe-K lines

Shin'ya Yamada, K. Makishima, K. Nakazawa, H. Noda, H. Takahashi, T. Dotani, Aya Kubota, K. Ebisawa, Y. Ueda, C. Done

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Suzaku has enabled us to study wide-band spectral and timing properties of black-hole binaries and AGNs more accurately than ever, and revealed how the continuum definition can affect Fe-Kline profiles. We have reproduced 0.5-300 keV spectra of Cyg X-1 and GRO J1655-40 in terms of thermal Comptonization in highly inhomogeneous coronae. In both objects, Rin was constrained by the Fe-K line profile and soft excess as ∼10 Rg, as opposed to the relativistic Fe-K line reported in the literature. We also re-analyzed the 0.7-300 keV Suzaku spectra of GX 339-4, and found that a careful modeling of the continuum leads to Rin>Rg(Yamada et al. 2009), again in disagreement with Miller et al. (2008). Furthermore, through a systematic analysis of AGNs, we discovered a hard spectral component in the HXD-PIN band, which varies independently of the powerlaw. Taking this into account, the time-averaged spectra of MCG-6-30-15 have been explained by invoking neither a large refection fraction, nor an extreme broad Fe-K line. The essence here is that the hard X-ray (20-40 keV) bump may be partially explained as an additional Comptonization component. Our results indicate that the extremely relativistic Fe-K line reported for some objects is not a unique solution, and depends in many cases on the continuum modeling.

Original languageEnglish
Title of host publicationAIP Conference Proceedings
Pages317-320
Number of pages4
Volume1248
DOIs
Publication statusPublished - 2010
EventInternational Conference on X-ray Astronomy-2009: Present Status, Multi-Wavelength Approach and Future Perspectives - Bologna
Duration: 2009 Sep 72009 Sep 11

Other

OtherInternational Conference on X-ray Astronomy-2009: Present Status, Multi-Wavelength Approach and Future Perspectives
CityBologna
Period09/9/709/9/11

Fingerprint

K lines
continuums
broadband
continuum modeling
profiles
coronas
time measurement
x rays

Keywords

  • Cyg X-1
  • GX 339-4
  • MCG-6-30-15
  • X-ray binaries

ASJC Scopus subject areas

  • Physics and Astronomy(all)

Cite this

Yamada, S., Makishima, K., Nakazawa, K., Noda, H., Takahashi, H., Dotani, T., ... Done, C. (2010). Suzaku wide-band observations of black-hole binaries and AGNs: Continuum and Fe-K lines. In AIP Conference Proceedings (Vol. 1248, pp. 317-320) https://doi.org/10.1063/1.3475246

Suzaku wide-band observations of black-hole binaries and AGNs : Continuum and Fe-K lines. / Yamada, Shin'ya; Makishima, K.; Nakazawa, K.; Noda, H.; Takahashi, H.; Dotani, T.; Kubota, Aya; Ebisawa, K.; Ueda, Y.; Done, C.

AIP Conference Proceedings. Vol. 1248 2010. p. 317-320.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Yamada, S, Makishima, K, Nakazawa, K, Noda, H, Takahashi, H, Dotani, T, Kubota, A, Ebisawa, K, Ueda, Y & Done, C 2010, Suzaku wide-band observations of black-hole binaries and AGNs: Continuum and Fe-K lines. in AIP Conference Proceedings. vol. 1248, pp. 317-320, International Conference on X-ray Astronomy-2009: Present Status, Multi-Wavelength Approach and Future Perspectives, Bologna, 09/9/7. https://doi.org/10.1063/1.3475246
Yamada S, Makishima K, Nakazawa K, Noda H, Takahashi H, Dotani T et al. Suzaku wide-band observations of black-hole binaries and AGNs: Continuum and Fe-K lines. In AIP Conference Proceedings. Vol. 1248. 2010. p. 317-320 https://doi.org/10.1063/1.3475246
Yamada, Shin'ya ; Makishima, K. ; Nakazawa, K. ; Noda, H. ; Takahashi, H. ; Dotani, T. ; Kubota, Aya ; Ebisawa, K. ; Ueda, Y. ; Done, C. / Suzaku wide-band observations of black-hole binaries and AGNs : Continuum and Fe-K lines. AIP Conference Proceedings. Vol. 1248 2010. pp. 317-320
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