LOW-FREQUENCY QUASI-PERIODIC OSCILLATION FROM THE 11 Hz ACCRETING PULSAR IN TERZAN 5: NOT FRAME DRAGGING
We report on six RXTE observations taken during the 2010 outburst of the 11 Hz accreting pulsar IGR J17480–2446 located in the globular cluster Terzan 5. During these observations we find power spectra which resemble those seen in Z-type high-luminosity neutron star low-mass X-ray binaries, with a q...
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| Format: | Article |
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IOP Publishing
2015
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| Online Access: | http://hdl.handle.net/1721.1/95640 |
| _version_ | 1826206682399637504 |
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| author | Altamirano, D. Ingram, A. van der Klis, M. Wijnands, R. Linares Alegret, Manuel Homan, Jeroen |
| author2 | MIT Kavli Institute for Astrophysics and Space Research |
| author_facet | MIT Kavli Institute for Astrophysics and Space Research Altamirano, D. Ingram, A. van der Klis, M. Wijnands, R. Linares Alegret, Manuel Homan, Jeroen |
| author_sort | Altamirano, D. |
| collection | MIT |
| description | We report on six RXTE observations taken during the 2010 outburst of the 11 Hz accreting pulsar IGR J17480–2446 located in the globular cluster Terzan 5. During these observations we find power spectra which resemble those seen in Z-type high-luminosity neutron star low-mass X-ray binaries, with a quasi-periodic oscillation (QPO) in the 35-50 Hz range simultaneous with a kHz QPO and broadband noise. Using well-known frequency-frequency correlations, we identify the 35-50 Hz QPOs as the horizontal branch oscillations, which were previously suggested to be due to Lense-Thirring (LT) precession. As IGR J17480–2446 spins more than an order of magnitude more slowly than any of the other neutron stars where these QPOs were found, this QPO cannot be explained by frame dragging. By extension, this casts doubt on the LT precession model for other low-frequency QPOs in neutron stars and perhaps even black hole systems. |
| first_indexed | 2024-09-23T13:36:55Z |
| format | Article |
| id | mit-1721.1/95640 |
| institution | Massachusetts Institute of Technology |
| language | en_US |
| last_indexed | 2024-09-23T13:36:55Z |
| publishDate | 2015 |
| publisher | IOP Publishing |
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| spelling | mit-1721.1/956402022-10-01T16:02:17Z LOW-FREQUENCY QUASI-PERIODIC OSCILLATION FROM THE 11 Hz ACCRETING PULSAR IN TERZAN 5: NOT FRAME DRAGGING Altamirano, D. Ingram, A. van der Klis, M. Wijnands, R. Linares Alegret, Manuel Homan, Jeroen MIT Kavli Institute for Astrophysics and Space Research Linares Alegret, Manuel Homan, Jeroen We report on six RXTE observations taken during the 2010 outburst of the 11 Hz accreting pulsar IGR J17480–2446 located in the globular cluster Terzan 5. During these observations we find power spectra which resemble those seen in Z-type high-luminosity neutron star low-mass X-ray binaries, with a quasi-periodic oscillation (QPO) in the 35-50 Hz range simultaneous with a kHz QPO and broadband noise. Using well-known frequency-frequency correlations, we identify the 35-50 Hz QPOs as the horizontal branch oscillations, which were previously suggested to be due to Lense-Thirring (LT) precession. As IGR J17480–2446 spins more than an order of magnitude more slowly than any of the other neutron stars where these QPOs were found, this QPO cannot be explained by frame dragging. By extension, this casts doubt on the LT precession model for other low-frequency QPOs in neutron stars and perhaps even black hole systems. Netherlands Organization for Scientific Research (Visitors Grant) 2015-02-25T22:04:07Z 2015-02-25T22:04:07Z 2012-10 2012-09 Article http://purl.org/eprint/type/JournalArticle 2041-8205 2041-8213 http://hdl.handle.net/1721.1/95640 Altamirano, D., A. Ingram, M. van der Klis, R. Wijnands, M. Linares, and J. Homan. “LOW-FREQUENCY QUASI-PERIODIC OSCILLATION FROM THE 11 Hz ACCRETING PULSAR IN TERZAN 5: NOT FRAME DRAGGING.” The Astrophysical Journal 759, no. 1 (October 16, 2012): L20. © 2012 The American Astronomical Society en_US http://dx.doi.org/10.1088/2041-8205/759/1/l20 Astrophysical Journal. Letters 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 | Altamirano, D. Ingram, A. van der Klis, M. Wijnands, R. Linares Alegret, Manuel Homan, Jeroen LOW-FREQUENCY QUASI-PERIODIC OSCILLATION FROM THE 11 Hz ACCRETING PULSAR IN TERZAN 5: NOT FRAME DRAGGING |
| title | LOW-FREQUENCY QUASI-PERIODIC OSCILLATION FROM THE 11 Hz ACCRETING PULSAR IN TERZAN 5: NOT FRAME DRAGGING |
| title_full | LOW-FREQUENCY QUASI-PERIODIC OSCILLATION FROM THE 11 Hz ACCRETING PULSAR IN TERZAN 5: NOT FRAME DRAGGING |
| title_fullStr | LOW-FREQUENCY QUASI-PERIODIC OSCILLATION FROM THE 11 Hz ACCRETING PULSAR IN TERZAN 5: NOT FRAME DRAGGING |
| title_full_unstemmed | LOW-FREQUENCY QUASI-PERIODIC OSCILLATION FROM THE 11 Hz ACCRETING PULSAR IN TERZAN 5: NOT FRAME DRAGGING |
| title_short | LOW-FREQUENCY QUASI-PERIODIC OSCILLATION FROM THE 11 Hz ACCRETING PULSAR IN TERZAN 5: NOT FRAME DRAGGING |
| title_sort | low frequency quasi periodic oscillation from the 11 hz accreting pulsar in terzan 5 not frame dragging |
| url | http://hdl.handle.net/1721.1/95640 |
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