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| Format: | Preprint |
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2024
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| Subjects: | |
| Online Access: | https://arxiv.org/abs/2411.16606 |
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| _version_ | 1866911025258823680 |
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| author | Wang, Ziteng Rea, Nanda Bao, Tong Kaplan, David L. Lenc, Emil Wadiasingh, Zorawar Hare, Jeremy Zic, Andrew Anumarlapudi, Akash Bera, Apurba Beniamini, Paz Cooper, A. J. Clarke, Tracy E. Deller, Adam T. Dawson, J. R. Glowacki, Marcin Hurley-Walker, Natasha McSweeney, S. J. Polisensky, Emil J. Peters, Wendy M. Younes, George Bannister, Keith W. Caleb, Manisha Dage, Kristen C. James, Clancy W. Kasliwal, Mansi M. Karambelkar, Viraj Lower, Marcus E. Mori, Kaya Ocker, Stella Koch Pérez-Torres, Miguel Qiu, Hao Rose, Kovi Shannon, Ryan M. Taub, Rhianna Wang, Fayin Wang, Yuanming Zhao, Zhenyin Bhat, N. D. R. Dobie, Dougal Driessen, Laura N. Murphy, Tara Jaini, Akhil Deng, Xinping Jahns-Schindler, Joscha N. Lee, Y. W. J. Pritchard, Joshua Tuthill, John Thyagarajan, Nithyanandan |
| author_facet | Wang, Ziteng Rea, Nanda Bao, Tong Kaplan, David L. Lenc, Emil Wadiasingh, Zorawar Hare, Jeremy Zic, Andrew Anumarlapudi, Akash Bera, Apurba Beniamini, Paz Cooper, A. J. Clarke, Tracy E. Deller, Adam T. Dawson, J. R. Glowacki, Marcin Hurley-Walker, Natasha McSweeney, S. J. Polisensky, Emil J. Peters, Wendy M. Younes, George Bannister, Keith W. Caleb, Manisha Dage, Kristen C. James, Clancy W. Kasliwal, Mansi M. Karambelkar, Viraj Lower, Marcus E. Mori, Kaya Ocker, Stella Koch Pérez-Torres, Miguel Qiu, Hao Rose, Kovi Shannon, Ryan M. Taub, Rhianna Wang, Fayin Wang, Yuanming Zhao, Zhenyin Bhat, N. D. R. Dobie, Dougal Driessen, Laura N. Murphy, Tara Jaini, Akhil Deng, Xinping Jahns-Schindler, Joscha N. Lee, Y. W. J. Pritchard, Joshua Tuthill, John Thyagarajan, Nithyanandan |
| contents | Recently, a class of long-period radio transients (LPTs) has been discovered, exhibiting emission on timescales thousands of times longer than radio pulsars. Several models had been proposed implicating either a strong magnetic field neutron star, isolated white dwarf pulsar, or a white dwarf binary system with a low-mass companion. While several models for LPTs also predict X-ray emission, no LPTs have been detected in X-rays despite extensive searches. Here we report the discovery of an extremely bright LPT (10-20 Jy in radio), ASKAP J1832-0911, which has coincident radio and X-ray emission, both with a 44.2-minute period. The X-ray and radio luminosities are correlated and vary by several orders of magnitude. These properties are unique amongst known Galactic objects and require a new explanation. We consider a $\gtrsim0.5$ Myr old magnetar with a $\gtrsim 10^{13}$ G crustal field, or an extremely magnetised white dwarf in a binary system with a dwarf companion, to be plausible explanations for ASKAP J1832-0911, although both explanations pose significant challenges to formation and emission theories. The X-ray detection also establishes a new class of hour-scale periodic X-ray transients of luminosity $\sim10^{33}$ erg/s associated with exceptionally bright coherent radio emission. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_16606 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Detection of X-ray Emission from a Bright Long-Period Radio Transient Wang, Ziteng Rea, Nanda Bao, Tong Kaplan, David L. Lenc, Emil Wadiasingh, Zorawar Hare, Jeremy Zic, Andrew Anumarlapudi, Akash Bera, Apurba Beniamini, Paz Cooper, A. J. Clarke, Tracy E. Deller, Adam T. Dawson, J. R. Glowacki, Marcin Hurley-Walker, Natasha McSweeney, S. J. Polisensky, Emil J. Peters, Wendy M. Younes, George Bannister, Keith W. Caleb, Manisha Dage, Kristen C. James, Clancy W. Kasliwal, Mansi M. Karambelkar, Viraj Lower, Marcus E. Mori, Kaya Ocker, Stella Koch Pérez-Torres, Miguel Qiu, Hao Rose, Kovi Shannon, Ryan M. Taub, Rhianna Wang, Fayin Wang, Yuanming Zhao, Zhenyin Bhat, N. D. R. Dobie, Dougal Driessen, Laura N. Murphy, Tara Jaini, Akhil Deng, Xinping Jahns-Schindler, Joscha N. Lee, Y. W. J. Pritchard, Joshua Tuthill, John Thyagarajan, Nithyanandan High Energy Astrophysical Phenomena Recently, a class of long-period radio transients (LPTs) has been discovered, exhibiting emission on timescales thousands of times longer than radio pulsars. Several models had been proposed implicating either a strong magnetic field neutron star, isolated white dwarf pulsar, or a white dwarf binary system with a low-mass companion. While several models for LPTs also predict X-ray emission, no LPTs have been detected in X-rays despite extensive searches. Here we report the discovery of an extremely bright LPT (10-20 Jy in radio), ASKAP J1832-0911, which has coincident radio and X-ray emission, both with a 44.2-minute period. The X-ray and radio luminosities are correlated and vary by several orders of magnitude. These properties are unique amongst known Galactic objects and require a new explanation. We consider a $\gtrsim0.5$ Myr old magnetar with a $\gtrsim 10^{13}$ G crustal field, or an extremely magnetised white dwarf in a binary system with a dwarf companion, to be plausible explanations for ASKAP J1832-0911, although both explanations pose significant challenges to formation and emission theories. The X-ray detection also establishes a new class of hour-scale periodic X-ray transients of luminosity $\sim10^{33}$ erg/s associated with exceptionally bright coherent radio emission. |
| title | Detection of X-ray Emission from a Bright Long-Period Radio Transient |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2411.16606 |