NuSTAR DISCOVERY OF AN UNUSUALLY STEADY LONG-TERM SPIN-UP OF THE Be BINARY 2RXP J130159.6–635806
We present spectral and timing analyses of Nuclear Spectroscopic Telescope Array (NuSTAR) observations of the accreting X-ray pulsar 2RXP J130159.6–635806. The source was serendipitously observed during a campaign focused on the gamma-ray binary PSR B1259–63 and was later targeted for a dedicated ob...
| Main Authors: | , , , , , , , , , , , , , , , , |
|---|---|
| Other Authors: | |
| Format: | Article |
| Language: | en_US |
| Published: |
IOP Publishing
2015
|
| Online Access: | http://hdl.handle.net/1721.1/99917 https://orcid.org/0000-0001-8804-8946 |
| _version_ | 1826207125076967424 |
|---|---|
| author | Krivonos, Roman A. Tsygankov, Sergey S. Lutovinov, Alexander A. Tomsick, John A. Chakrabarty, Deepto Bachetti, Matteo Boggs, Steven E. Chernyakova, Masha Christensen, Finn E. Craig, William W. Fürst, Felix Hailey, Charles J. Harrison, Fiona A. Lansbury, George B. Rahoui, Farid Stern, Daniel Zhang, William W. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics Krivonos, Roman A. Tsygankov, Sergey S. Lutovinov, Alexander A. Tomsick, John A. Chakrabarty, Deepto Bachetti, Matteo Boggs, Steven E. Chernyakova, Masha Christensen, Finn E. Craig, William W. Fürst, Felix Hailey, Charles J. Harrison, Fiona A. Lansbury, George B. Rahoui, Farid Stern, Daniel Zhang, William W. |
| author_sort | Krivonos, Roman A. |
| collection | MIT |
| description | We present spectral and timing analyses of Nuclear Spectroscopic Telescope Array (NuSTAR) observations of the accreting X-ray pulsar 2RXP J130159.6–635806. The source was serendipitously observed during a campaign focused on the gamma-ray binary PSR B1259–63 and was later targeted for a dedicated observation. The spectrum has a typical shape for accreting X-ray pulsars, consisting of a simple power law with an exponential cutoff starting at ~7 keV with a folding energy of E[subscript fold] ≃ 18 keV. There is also an indication of the presence of a 6.4 keV iron line in the spectrum at the ~3σ significance level. NuSTAR measurements of the pulsation period reveal that the pulsar has undergone a strong and steady spin-up for the last 20 years. The pulsed fraction is estimated to be ~80%, and is constant with energy up to 40 keV. The power density spectrum shows a break toward higher frequencies relative to the current spin period. This, together with steady persistent luminosity, points to a long-term mass accretion rate high enough to bring the pulsar out of spin equilibrium. |
| first_indexed | 2024-09-23T13:44:31Z |
| format | Article |
| id | mit-1721.1/99917 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:44:31Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
| record_format | dspace |
| spelling | mit-1721.1/999172022-09-28T15:50:41Z NuSTAR DISCOVERY OF AN UNUSUALLY STEADY LONG-TERM SPIN-UP OF THE Be BINARY 2RXP J130159.6–635806 Krivonos, Roman A. Tsygankov, Sergey S. Lutovinov, Alexander A. Tomsick, John A. Chakrabarty, Deepto Bachetti, Matteo Boggs, Steven E. Chernyakova, Masha Christensen, Finn E. Craig, William W. Fürst, Felix Hailey, Charles J. Harrison, Fiona A. Lansbury, George B. Rahoui, Farid Stern, Daniel Zhang, William W. Massachusetts Institute of Technology. Department of Physics MIT Kavli Institute for Astrophysics and Space Research Chakrabarty, Deepto We present spectral and timing analyses of Nuclear Spectroscopic Telescope Array (NuSTAR) observations of the accreting X-ray pulsar 2RXP J130159.6–635806. The source was serendipitously observed during a campaign focused on the gamma-ray binary PSR B1259–63 and was later targeted for a dedicated observation. The spectrum has a typical shape for accreting X-ray pulsars, consisting of a simple power law with an exponential cutoff starting at ~7 keV with a folding energy of E[subscript fold] ≃ 18 keV. There is also an indication of the presence of a 6.4 keV iron line in the spectrum at the ~3σ significance level. NuSTAR measurements of the pulsation period reveal that the pulsar has undergone a strong and steady spin-up for the last 20 years. The pulsed fraction is estimated to be ~80%, and is constant with energy up to 40 keV. The power density spectrum shows a break toward higher frequencies relative to the current spin period. This, together with steady persistent luminosity, points to a long-term mass accretion rate high enough to bring the pulsar out of spin equilibrium. 2015-11-13T15:05:59Z 2015-11-13T15:05:59Z 2015-08 2015-05 Article http://purl.org/eprint/type/JournalArticle 1538-4357 0004-637X http://hdl.handle.net/1721.1/99917 Krivonos, Roman A., Sergey S. Tsygankov, Alexander A. Lutovinov, John A. Tomsick, Deepto Chakrabarty, Matteo Bachetti, Steven E. Boggs, et al. “NuSTAR DISCOVERY OF AN UNUSUALLY STEADY LONG-TERM SPIN-UP OF THE Be BINARY 2RXP J130159.6–635806.” The Astrophysical Journal 809, no. 2 (August 19, 2015): 140. © 2015 The American Astronomical Society https://orcid.org/0000-0001-8804-8946 en_US http://dx.doi.org/10.1088/0004-637x/809/2/140 The 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 IOP Publishing |
| spellingShingle | Krivonos, Roman A. Tsygankov, Sergey S. Lutovinov, Alexander A. Tomsick, John A. Chakrabarty, Deepto Bachetti, Matteo Boggs, Steven E. Chernyakova, Masha Christensen, Finn E. Craig, William W. Fürst, Felix Hailey, Charles J. Harrison, Fiona A. Lansbury, George B. Rahoui, Farid Stern, Daniel Zhang, William W. NuSTAR DISCOVERY OF AN UNUSUALLY STEADY LONG-TERM SPIN-UP OF THE Be BINARY 2RXP J130159.6–635806 |
| title | NuSTAR DISCOVERY OF AN UNUSUALLY STEADY LONG-TERM SPIN-UP OF THE Be BINARY 2RXP J130159.6–635806 |
| title_full | NuSTAR DISCOVERY OF AN UNUSUALLY STEADY LONG-TERM SPIN-UP OF THE Be BINARY 2RXP J130159.6–635806 |
| title_fullStr | NuSTAR DISCOVERY OF AN UNUSUALLY STEADY LONG-TERM SPIN-UP OF THE Be BINARY 2RXP J130159.6–635806 |
| title_full_unstemmed | NuSTAR DISCOVERY OF AN UNUSUALLY STEADY LONG-TERM SPIN-UP OF THE Be BINARY 2RXP J130159.6–635806 |
| title_short | NuSTAR DISCOVERY OF AN UNUSUALLY STEADY LONG-TERM SPIN-UP OF THE Be BINARY 2RXP J130159.6–635806 |
| title_sort | nustar discovery of an unusually steady long term spin up of the be binary 2rxp j130159 6 635806 |
| url | http://hdl.handle.net/1721.1/99917 https://orcid.org/0000-0001-8804-8946 |
| work_keys_str_mv | AT krivonosromana nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT tsygankovsergeys nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT lutovinovalexandera nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT tomsickjohna nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT chakrabartydeepto nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT bachettimatteo nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT boggsstevene nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT chernyakovamasha nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT christensenfinne nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT craigwilliamw nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT furstfelix nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT haileycharlesj nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT harrisonfionaa nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT lansburygeorgeb nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT rahouifarid nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT sterndaniel nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 AT zhangwilliamw nustardiscoveryofanunusuallysteadylongtermspinupofthebebinary2rxpj1301596635806 |