The reflection component from Cygnus X-1 in the soft state measured by Nustar and Suzaku
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 a...
| Main Authors: | , , , , , , , , , , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | en_US |
| Published: |
IOP Publishing
2015
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| Online Access: | http://hdl.handle.net/1721.1/92794 |
| _version_ | 1811090775412310016 |
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| author | Tomsick, John A. Nowak, Michael A. Parker, Michael Miller, Jon M. Fabian, Andrew C. Harrison, Fiona A. Bachetti, Matteo Barret, Didier Boggs, Steven E. Christensen, Finn E. Craig, William W. Forster, Karl Furst, Felix Grefenstette, Brian W. Hailey, Charles J. King, A. L. Madsen, Kristin K. Natalucci, Lorenzo Pottschmidt, Katja Ross, Randy R. Stern, Daniel Walton, Dominic J. Wilms, Jörn Zhang, William W. |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Tomsick, John A. Nowak, Michael A. Parker, Michael Miller, Jon M. Fabian, Andrew C. Harrison, Fiona A. Bachetti, Matteo Barret, Didier Boggs, Steven E. Christensen, Finn E. Craig, William W. Forster, Karl Furst, Felix Grefenstette, Brian W. Hailey, Charles J. King, A. L. Madsen, Kristin K. Natalucci, Lorenzo Pottschmidt, Katja Ross, Randy R. Stern, Daniel Walton, Dominic J. Wilms, Jörn Zhang, William W. |
| author_sort | Tomsick, John A. |
| collection | MIT |
| description | 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° 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. |
| first_indexed | 2024-09-23T14:51:46Z |
| format | Article |
| id | mit-1721.1/92794 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T14:51:46Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/927942022-09-29T11:01:57Z 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, Andrew C. Harrison, Fiona A. Bachetti, Matteo Barret, Didier Boggs, Steven E. Christensen, Finn E. Craig, William W. Forster, Karl Furst, Felix Grefenstette, Brian W. Hailey, Charles J. King, A. L. Madsen, Kristin K. Natalucci, Lorenzo Pottschmidt, Katja Ross, Randy R. Stern, Daniel Walton, Dominic J. Wilms, Jörn Zhang, William W. MIT Kavli Institute for Astrophysics and Space Research Nowak, Michael A. 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° 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. United States. National Aeronautics and Space Administration (Contract NNG08FD60C) 2015-01-12T18:05:34Z 2015-01-12T18:05:34Z 2013-12 2013-09 Article http://purl.org/eprint/type/JournalArticle 0004-637X 1538-4357 http://hdl.handle.net/1721.1/92794 Tomsick, John A., Michael A. Nowak, Michael Parker, Jon M. Miller, Andy C. Fabian, Fiona A. Harrison, Matteo Bachetti, et al. “The Reflection Component from Cygnus X-1 in the Soft State Measured by Nustar and Suzaku.” The Astrophysical Journal 780, no. 1 (December 13, 2013): 78. © 2014 The American Astronomical Society en_US http://dx.doi.org/10.1088/0004-637x/780/1/78 Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf IOP Publishing American Astronomical Society |
| spellingShingle | Tomsick, John A. Nowak, Michael A. Parker, Michael Miller, Jon M. Fabian, Andrew C. Harrison, Fiona A. Bachetti, Matteo Barret, Didier Boggs, Steven E. Christensen, Finn E. Craig, William W. Forster, Karl Furst, Felix Grefenstette, Brian W. Hailey, Charles J. King, A. L. Madsen, Kristin K. Natalucci, Lorenzo Pottschmidt, Katja Ross, Randy R. Stern, Daniel Walton, Dominic J. Wilms, Jörn Zhang, William W. The reflection component from Cygnus X-1 in the soft state measured by Nustar and Suzaku |
| title | The reflection component from Cygnus X-1 in the soft state measured by Nustar and Suzaku |
| title_full | The reflection component from Cygnus X-1 in the soft state measured by Nustar and Suzaku |
| title_fullStr | The reflection component from Cygnus X-1 in the soft state measured by Nustar and Suzaku |
| title_full_unstemmed | The reflection component from Cygnus X-1 in the soft state measured by Nustar and Suzaku |
| title_short | The reflection component from Cygnus X-1 in the soft state measured by Nustar and Suzaku |
| title_sort | reflection component from cygnus x 1 in the soft state measured by nustar and suzaku |
| url | http://hdl.handle.net/1721.1/92794 |
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