An unidentified Fermi source emitting radio bursts in the Galactic bulge
Fuente:
arXiv
Gespeichert in:
| Hauptverfasser: | , , , , , , , |
|---|---|
| Format: | Preprint |
| Veröffentlicht: |
2024
|
| Schlagworte: | |
| Online-Zugang: | |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| _version_ | 1866914964424359936 |
|---|---|
| author | Anna-Thomas, Reshma Burke-Spolaor, Sarah Law, Casey J. Schinzel, F. K. Aggarwal, Kshitij Bower, Geoffrey C. Connor, Liam Demorest, Paul B. |
| author_facet | Anna-Thomas, Reshma Burke-Spolaor, Sarah Law, Casey J. Schinzel, F. K. Aggarwal, Kshitij Bower, Geoffrey C. Connor, Liam Demorest, Paul B. |
| contents | We report on the detection of radio bursts from the Galactic bulge using the real-time transient detection and localization system, realfast. The pulses were detected commensally on the Karl G. Jansky Very Large Array during a survey of unidentified Fermi $γ$-ray sources. The bursts were localized to subarcsecond precision using realfast fast-sampled imaging. Follow-up observations with the Green Bank Telescope detected additional bursts from the same source. The bursts do not exhibit periodicity in a search up to periods of 480 s, assuming a duty cycle of < 20%. The pulses are nearly 100% linearly polarized, showing circular polarization up to 12%, and exhibit variable scattering on timescales of months. The arcsecond-level realfast localization links the source confidently with the Fermi $γ$-ray source and places it nearby (though not coincident with) an XMM-Newton X-ray source. Based on the source's overall properties, we discuss various options for the nature of this object and propose that it could be a young pulsar, a magnetar, or a binary pulsar system. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2401_02498 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | An unidentified Fermi source emitting radio bursts in the Galactic bulge Anna-Thomas, Reshma Burke-Spolaor, Sarah Law, Casey J. Schinzel, F. K. Aggarwal, Kshitij Bower, Geoffrey C. Connor, Liam Demorest, Paul B. High Energy Astrophysical Phenomena We report on the detection of radio bursts from the Galactic bulge using the real-time transient detection and localization system, realfast. The pulses were detected commensally on the Karl G. Jansky Very Large Array during a survey of unidentified Fermi $γ$-ray sources. The bursts were localized to subarcsecond precision using realfast fast-sampled imaging. Follow-up observations with the Green Bank Telescope detected additional bursts from the same source. The bursts do not exhibit periodicity in a search up to periods of 480 s, assuming a duty cycle of < 20%. The pulses are nearly 100% linearly polarized, showing circular polarization up to 12%, and exhibit variable scattering on timescales of months. The arcsecond-level realfast localization links the source confidently with the Fermi $γ$-ray source and places it nearby (though not coincident with) an XMM-Newton X-ray source. Based on the source's overall properties, we discuss various options for the nature of this object and propose that it could be a young pulsar, a magnetar, or a binary pulsar system. |
| title | An unidentified Fermi source emitting radio bursts in the Galactic bulge |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2401.02498 |