The Reflection Component from Cygnus X-1 in the Soft State Measured by NuSTAR and Suzaku

Research output: Contribution to journalJournal article – Annual report year: 2014Researchpeer-review

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The Reflection Component from Cygnus X-1 in the Soft State Measured by NuSTAR and Suzaku. / Tomsick, John A.; Nowak, Michael A.; Parker, Michael; Miller, Jon M.; Fabian, Andy C.; Harrison, Fiona A.; Bachetti, Matteo; Barret, Didier; Boggs, Steven E.; Christensen, Finn Erland; Craig, William W.; Forster, Karl; Fuerst, Felix; Grefenstette, Brian W.; Hailey, Charles J.; King, Ashley L.; Madsen, Kristin K.; Natalucci, Lorenzo; Pottschmidt, Katja; Ross, Randy R.; Stern, Daniel; Walton, Dominic J.; Wilms, Joern; Zhang, William W.

In: Astrophysical Journal, Vol. 780, No. 1, 2014.

Research output: Contribution to journalJournal article – Annual report year: 2014Researchpeer-review

Harvard

Tomsick, JA, Nowak, MA, Parker, M, Miller, JM, Fabian, AC, Harrison, FA, Bachetti, M, Barret, D, Boggs, SE, Christensen, FE, Craig, WW, Forster, K, Fuerst, F, Grefenstette, BW, Hailey, CJ, King, AL, Madsen, KK, Natalucci, L, Pottschmidt, K, Ross, RR, Stern, D, Walton, DJ, Wilms, J & Zhang, WW 2014, 'The Reflection Component from Cygnus X-1 in the Soft State Measured by NuSTAR and Suzaku', Astrophysical Journal, vol. 780, no. 1. https://doi.org/10.1088/0004-637X/780/1/78

APA

Tomsick, J. A., Nowak, M. A., Parker, M., Miller, J. M., Fabian, A. C., Harrison, F. A., ... Zhang, W. W. (2014). The Reflection Component from Cygnus X-1 in the Soft State Measured by NuSTAR and Suzaku. Astrophysical Journal, 780(1). https://doi.org/10.1088/0004-637X/780/1/78

CBE

Tomsick JA, Nowak MA, Parker M, Miller JM, Fabian AC, Harrison FA, Bachetti M, Barret D, Boggs SE, Christensen FE, Craig WW, Forster K, Fuerst F, Grefenstette BW, Hailey CJ, King AL, Madsen KK, Natalucci L, Pottschmidt K, Ross RR, Stern D, Walton DJ, Wilms J, Zhang WW. 2014. The Reflection Component from Cygnus X-1 in the Soft State Measured by NuSTAR and Suzaku. Astrophysical Journal. 780(1). https://doi.org/10.1088/0004-637X/780/1/78

MLA

Vancouver

Author

Tomsick, John A. ; Nowak, Michael A. ; Parker, Michael ; Miller, Jon M. ; Fabian, Andy C. ; Harrison, Fiona A. ; Bachetti, Matteo ; Barret, Didier ; Boggs, Steven E. ; Christensen, Finn Erland ; Craig, William W. ; Forster, Karl ; Fuerst, Felix ; Grefenstette, Brian W. ; Hailey, Charles J. ; King, Ashley L. ; Madsen, Kristin K. ; Natalucci, Lorenzo ; Pottschmidt, Katja ; Ross, Randy R. ; Stern, Daniel ; Walton, Dominic J. ; Wilms, Joern ; Zhang, William W. / The Reflection Component from Cygnus X-1 in the Soft State Measured by NuSTAR and Suzaku. In: Astrophysical Journal. 2014 ; Vol. 780, No. 1.

Bibtex

@article{b2b0920aa1c54041b55ea0da88366085,
title = "The Reflection Component from Cygnus X-1 in the Soft State Measured by NuSTAR and Suzaku",
abstract = "The black hole binary Cygnus X-1 was observed in late-2012 with the Nuclear Spectroscopic Telescope Array (NuSTAR) and Suzaku, providing spectral coverage over the ~1-300 keV range. The source was in the soft state with a multi-temperature blackbody, power-law, and reflection components along with absorption from highly ionized material in the system. The high throughput of NuSTAR allows for a very high quality measurement of the complex iron line region as well as the rest of the reflection component. The iron line is clearly broadened and is well-described by a relativistic blurring model, providing an opportunity to constrain the black hole spin. Although the spin constraint depends somewhat on which continuum model is used, we obtain a*>0.83 for all models that provide a good description of the spectrum. However, none of our spectral fits give a disk inclination that is consistent with the most recently reported binary values for Cyg X-1. This may indicate that there is a >13 degree misalignment between the orbital plane and the inner accretion disk (i.e., a warped accretion disk) or that there is missing physics in the spectral models.",
author = "Tomsick, {John A.} and Nowak, {Michael A.} and Michael Parker and Miller, {Jon M.} and Fabian, {Andy C.} and Harrison, {Fiona A.} and Matteo Bachetti and Didier Barret and Boggs, {Steven E.} and Christensen, {Finn Erland} and Craig, {William W.} and Karl Forster and Felix Fuerst and Grefenstette, {Brian W.} and Hailey, {Charles J.} and King, {Ashley L.} and Madsen, {Kristin K.} and Lorenzo Natalucci and Katja Pottschmidt and Ross, {Randy R.} and Daniel Stern and Walton, {Dominic J.} and Joern Wilms and Zhang, {William W.}",
year = "2014",
doi = "10.1088/0004-637X/780/1/78",
language = "English",
volume = "780",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "Institute of Physics Publishing, Inc",
number = "1",

}

RIS

TY - JOUR

T1 - The Reflection Component from Cygnus X-1 in the Soft State Measured by NuSTAR and Suzaku

AU - Tomsick, John A.

AU - Nowak, Michael A.

AU - Parker, Michael

AU - Miller, Jon M.

AU - Fabian, Andy C.

AU - Harrison, Fiona A.

AU - Bachetti, Matteo

AU - Barret, Didier

AU - Boggs, Steven E.

AU - Christensen, Finn Erland

AU - Craig, William W.

AU - Forster, Karl

AU - Fuerst, Felix

AU - Grefenstette, Brian W.

AU - Hailey, Charles J.

AU - King, Ashley L.

AU - Madsen, Kristin K.

AU - Natalucci, Lorenzo

AU - Pottschmidt, Katja

AU - Ross, Randy R.

AU - Stern, Daniel

AU - Walton, Dominic J.

AU - Wilms, Joern

AU - Zhang, William W.

PY - 2014

Y1 - 2014

N2 - The black hole binary Cygnus X-1 was observed in late-2012 with the Nuclear Spectroscopic Telescope Array (NuSTAR) and Suzaku, providing spectral coverage over the ~1-300 keV range. The source was in the soft state with a multi-temperature blackbody, power-law, and reflection components along with absorption from highly ionized material in the system. The high throughput of NuSTAR allows for a very high quality measurement of the complex iron line region as well as the rest of the reflection component. The iron line is clearly broadened and is well-described by a relativistic blurring model, providing an opportunity to constrain the black hole spin. Although the spin constraint depends somewhat on which continuum model is used, we obtain a*>0.83 for all models that provide a good description of the spectrum. However, none of our spectral fits give a disk inclination that is consistent with the most recently reported binary values for Cyg X-1. This may indicate that there is a >13 degree misalignment between the orbital plane and the inner accretion disk (i.e., a warped accretion disk) or that there is missing physics in the spectral models.

AB - The black hole binary Cygnus X-1 was observed in late-2012 with the Nuclear Spectroscopic Telescope Array (NuSTAR) and Suzaku, providing spectral coverage over the ~1-300 keV range. The source was in the soft state with a multi-temperature blackbody, power-law, and reflection components along with absorption from highly ionized material in the system. The high throughput of NuSTAR allows for a very high quality measurement of the complex iron line region as well as the rest of the reflection component. The iron line is clearly broadened and is well-described by a relativistic blurring model, providing an opportunity to constrain the black hole spin. Although the spin constraint depends somewhat on which continuum model is used, we obtain a*>0.83 for all models that provide a good description of the spectrum. However, none of our spectral fits give a disk inclination that is consistent with the most recently reported binary values for Cyg X-1. This may indicate that there is a >13 degree misalignment between the orbital plane and the inner accretion disk (i.e., a warped accretion disk) or that there is missing physics in the spectral models.

U2 - 10.1088/0004-637X/780/1/78

DO - 10.1088/0004-637X/780/1/78

M3 - Journal article

VL - 780

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1

ER -