Radio and X-ray monitoring of the accreting millisecond X-ray pulsar IGR J17591-2342 in outburst
© 2019 The Author(s). IGR J17591-2342 is a new accreting millisecond X-ray pulsar that was recently discovered in outburst in 2018. Early observations revealed that the source's radio emission is brighter than that of any other known neutron star low-mass X-ray binary (NS-LMXB) at comparable X-...
| Main Authors: | , , , , , , , , , |
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| Format: | Journal Article |
| Language: | English |
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OXFORD UNIV PRESS
2020
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| Online Access: | http://purl.org/au-research/grants/arc/FT140101082 http://hdl.handle.net/20.500.11937/80102 |
| _version_ | 1848764162363097088 |
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| author | Gusinskaia, N.V. Russell, T.D. Hessels, J.W.T. Bogdanov, S. Degenaar, N. Deller, A.T. Van Den Eijnden, J. Jaodand, A.D. Miller-Jones, James Wijnands, R. |
| author_facet | Gusinskaia, N.V. Russell, T.D. Hessels, J.W.T. Bogdanov, S. Degenaar, N. Deller, A.T. Van Den Eijnden, J. Jaodand, A.D. Miller-Jones, James Wijnands, R. |
| author_sort | Gusinskaia, N.V. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | © 2019 The Author(s). IGR J17591-2342 is a new accreting millisecond X-ray pulsar that was recently discovered in outburst in 2018. Early observations revealed that the source's radio emission is brighter than that of any other known neutron star low-mass X-ray binary (NS-LMXB) at comparable X-ray luminosity, and assuming its likely >~6 kpc distance. It is comparably radio bright to black hole LMXBs at similar X-ray luminosities. In this work, we present the results of our extensive radio and X-ray monitoring campaign of the 2018 outburst of IGR J17591-2342. In total, we collected 10 quasi-simultaneous radio (VLA, ATCA) and X-ray (Swift-XRT) observations, which make IGR J17591-2342 one of the best-sampled NS-LMXBs. We use these to fit a power-law correlation index β = 0.37+0.42-0.40 between observed radio and X-ray luminosities (LR α LXβ ). However, our monitoring revealed a large scatter in IGR J17591-2342's radio luminosity (at a similar X-ray luminosity, LX ~1036 erg s-1, and spectral state), with LR ~ 4 × 1029 erg s-1 during the first three reported observations, and up to a factor of 4 lower LR during later radio observations. None the less, the average radio luminosity of IGR J17591-2342 is still one of the highest among NS-LMXBs, and we discuss possible reasons for the wide range of radio luminosities observed in such systems during outburst.We found no evidence for radio pulsations from IGR J17591-2342 in our Green Bank Telescope observations performed shortly after the source returned to quiescence. None the less, we cannot rule out that IGR J17591-2342 becomes a radio millisecond pulsar during quiescence. |
| first_indexed | 2025-11-14T11:14:58Z |
| format | Journal Article |
| id | curtin-20.500.11937-80102 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| language | English |
| last_indexed | 2025-11-14T11:14:58Z |
| publishDate | 2020 |
| publisher | OXFORD UNIV PRESS |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-801022020-07-29T09:26:26Z Radio and X-ray monitoring of the accreting millisecond X-ray pulsar IGR J17591-2342 in outburst Gusinskaia, N.V. Russell, T.D. Hessels, J.W.T. Bogdanov, S. Degenaar, N. Deller, A.T. Van Den Eijnden, J. Jaodand, A.D. Miller-Jones, James Wijnands, R. Science & Technology Physical Sciences Astronomy & Astrophysics stars: neutron X-rays: binaries NEUTRON-STAR DISC WINDS BINARY JETS PULSATIONS SEARCH POWER SPIN © 2019 The Author(s). IGR J17591-2342 is a new accreting millisecond X-ray pulsar that was recently discovered in outburst in 2018. Early observations revealed that the source's radio emission is brighter than that of any other known neutron star low-mass X-ray binary (NS-LMXB) at comparable X-ray luminosity, and assuming its likely >~6 kpc distance. It is comparably radio bright to black hole LMXBs at similar X-ray luminosities. In this work, we present the results of our extensive radio and X-ray monitoring campaign of the 2018 outburst of IGR J17591-2342. In total, we collected 10 quasi-simultaneous radio (VLA, ATCA) and X-ray (Swift-XRT) observations, which make IGR J17591-2342 one of the best-sampled NS-LMXBs. We use these to fit a power-law correlation index β = 0.37+0.42-0.40 between observed radio and X-ray luminosities (LR α LXβ ). However, our monitoring revealed a large scatter in IGR J17591-2342's radio luminosity (at a similar X-ray luminosity, LX ~1036 erg s-1, and spectral state), with LR ~ 4 × 1029 erg s-1 during the first three reported observations, and up to a factor of 4 lower LR during later radio observations. None the less, the average radio luminosity of IGR J17591-2342 is still one of the highest among NS-LMXBs, and we discuss possible reasons for the wide range of radio luminosities observed in such systems during outburst.We found no evidence for radio pulsations from IGR J17591-2342 in our Green Bank Telescope observations performed shortly after the source returned to quiescence. None the less, we cannot rule out that IGR J17591-2342 becomes a radio millisecond pulsar during quiescence. 2020 Journal Article http://hdl.handle.net/20.500.11937/80102 10.1093/mnras/stz3460 English http://purl.org/au-research/grants/arc/FT140101082 OXFORD UNIV PRESS fulltext |
| spellingShingle | Science & Technology Physical Sciences Astronomy & Astrophysics stars: neutron X-rays: binaries NEUTRON-STAR DISC WINDS BINARY JETS PULSATIONS SEARCH POWER SPIN Gusinskaia, N.V. Russell, T.D. Hessels, J.W.T. Bogdanov, S. Degenaar, N. Deller, A.T. Van Den Eijnden, J. Jaodand, A.D. Miller-Jones, James Wijnands, R. Radio and X-ray monitoring of the accreting millisecond X-ray pulsar IGR J17591-2342 in outburst |
| title | Radio and X-ray monitoring of the accreting millisecond X-ray pulsar IGR J17591-2342 in outburst |
| title_full | Radio and X-ray monitoring of the accreting millisecond X-ray pulsar IGR J17591-2342 in outburst |
| title_fullStr | Radio and X-ray monitoring of the accreting millisecond X-ray pulsar IGR J17591-2342 in outburst |
| title_full_unstemmed | Radio and X-ray monitoring of the accreting millisecond X-ray pulsar IGR J17591-2342 in outburst |
| title_short | Radio and X-ray monitoring of the accreting millisecond X-ray pulsar IGR J17591-2342 in outburst |
| title_sort | radio and x-ray monitoring of the accreting millisecond x-ray pulsar igr j17591-2342 in outburst |
| topic | Science & Technology Physical Sciences Astronomy & Astrophysics stars: neutron X-rays: binaries NEUTRON-STAR DISC WINDS BINARY JETS PULSATIONS SEARCH POWER SPIN |
| url | http://purl.org/au-research/grants/arc/FT140101082 http://hdl.handle.net/20.500.11937/80102 |