Discovery of a 36-minute long-period transient ASKAP J142431.2-612611
Fuente:
arXiv
Saved in:
| Main Authors: | , , , , , , , , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2026
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866918379706646528 |
|---|---|
| author | Pritchard, Joshua Murphy, Tara Dobie, Dougal Lenc, Emil Anumarlapudi, Akash Caleb, Manisha Grainger, Sophia Hurley-Walker, Natasha Kaplan, David L. McSweeney, Samuel J. Mitchell-Bolton, Jackson Rose, Kovi Sengar, Rahul Wang, Ziteng Willingham, Jayde Zic, Andrew |
| author_facet | Pritchard, Joshua Murphy, Tara Dobie, Dougal Lenc, Emil Anumarlapudi, Akash Caleb, Manisha Grainger, Sophia Hurley-Walker, Natasha Kaplan, David L. McSweeney, Samuel J. Mitchell-Bolton, Jackson Rose, Kovi Sengar, Rahul Wang, Ziteng Willingham, Jayde Zic, Andrew |
| contents | We report the discovery of a new long-period radio transient, ASKAP J142431.2-612611, with a 36 minute period, identified in the Australian SKA Pathfinder Evolutionary Map of the Universe survey. We detected pulsed emission from ASKAP J142431.2-612611 over a period of eight days during follow-up observations with the Australia Telescope Compact Array, after which the source appears to have switched off. No optical or near-infrared counterpart is detected in archival surveys or in targeted Gemini South FLAMINGOS-2 observations. During its active state, the source exhibits a stable pulse profile with fractional polarisation consistent with 100%, evolving from elliptically to linearly polarised and tracing a well-defined great-circle trajectory on the Poincaré sphere. We show that this behaviour is consistent with fully linearly polarised intrinsic emission modified by propagation through a linearly polarised birefringent medium. This discovery expands the known population of long-period transients and highlights the intermittent nature of their activity. We discuss the implications for proposed models of long-period transients and outline future observations needed to constrain the origin of their intermittency and polarisation properties. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2603_07857 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Discovery of a 36-minute long-period transient ASKAP J142431.2-612611 Pritchard, Joshua Murphy, Tara Dobie, Dougal Lenc, Emil Anumarlapudi, Akash Caleb, Manisha Grainger, Sophia Hurley-Walker, Natasha Kaplan, David L. McSweeney, Samuel J. Mitchell-Bolton, Jackson Rose, Kovi Sengar, Rahul Wang, Ziteng Willingham, Jayde Zic, Andrew High Energy Astrophysical Phenomena We report the discovery of a new long-period radio transient, ASKAP J142431.2-612611, with a 36 minute period, identified in the Australian SKA Pathfinder Evolutionary Map of the Universe survey. We detected pulsed emission from ASKAP J142431.2-612611 over a period of eight days during follow-up observations with the Australia Telescope Compact Array, after which the source appears to have switched off. No optical or near-infrared counterpart is detected in archival surveys or in targeted Gemini South FLAMINGOS-2 observations. During its active state, the source exhibits a stable pulse profile with fractional polarisation consistent with 100%, evolving from elliptically to linearly polarised and tracing a well-defined great-circle trajectory on the Poincaré sphere. We show that this behaviour is consistent with fully linearly polarised intrinsic emission modified by propagation through a linearly polarised birefringent medium. This discovery expands the known population of long-period transients and highlights the intermittent nature of their activity. We discuss the implications for proposed models of long-period transients and outline future observations needed to constrain the origin of their intermittency and polarisation properties. |
| title | Discovery of a 36-minute long-period transient ASKAP J142431.2-612611 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2603.07857 |