تقرير
An unidentified Fermi source emitting radio bursts in the Galactic bulge
| العنوان: | An unidentified Fermi source emitting radio bursts in the Galactic bulge |
|---|---|
| المؤلفون: | Anna-Thomas, Reshma, Burke-Spolaor, Sarah, Law, Casey J., Schinzel, F. K., Aggarwal, Kshitij, Bower, Geoffrey C., Connor, Liam, Demorest, Paul B. |
| سنة النشر: | 2024 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - High Energy Astrophysical Phenomena |
| الوصف: | 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 $\gamma$-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 480s, assuming a duty cycle of < 20%. The pulses are nearly 100% linearly polarized, show circular polarization up to 12%, have a steep radio spectral index of -2.7, and exhibit variable scattering on timescales of months. The arcsecond-level realfast localization links the source confidently with the Fermi $\gamma$-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, magnetar, or a binary pulsar system. Comment: Submitted to The Astrophysical Journal |
| نوع الوثيقة: | Working Paper |
| URL الوصول: | http://arxiv.org/abs/2401.02498 |
| رقم الأكسشن: | edsarx.2401.02498 |
| قاعدة البيانات: | arXiv |
| الوصف غير متاح. |