论文标题
Chime FRB 190425a的最可能的主机,与二进制中子星合并GW190425和延迟短暂搜索有关
The most probable host of CHIME FRB 190425A, associated with binary neutron star merger GW190425, and a late-time transient search
论文作者
论文摘要
快速无线电爆发在其主机星系中的识别和定位揭示了有关这些神秘的,毫秒长的连贯无线电发射的祖细胞的重要细节。在这项工作中,我们研究了明显不重复的Chime/FRB事件FRB 20190425a的最可能的宿主星系 - Moroianu等人所证明的一个特别高的光度,低分散度测量事件。 2022在时间和空间上与Ligo-Virgo-Kagra二元中子星合并GW190425一致,这表明是天体物理相关的(p-value 0.0052)。在本文中,我们对此结果仍然不可知,并确认UGC10667是FRB 20190425a最可能的宿主星系,表明可以完全识别出低分散度量的宿主星系。然后,我们执行多波长的观测值来表征星系并搜索与FRB及其假定GW相关的任何余辉发射。我们在观察值中没有发现无线电或光学瞬态发射,$ 2.5 \,\ mathrm {yr} $ bost-burst。 UGC10667是$ z \ sim0.03 $的螺旋星系,由旧的恒星人口主导。我们没有发现大量年轻恒星的证据,nebular发射以恒星形成为主,速度为$ 1-2 \,\ mathrm {m_ \ odot \,yr^,yr^{ - 1}} $。尽管我们不能排除年轻的磁铁作为FRB 20190425a的起源,但我们的观察结果与Moroianu等人所提出的长延迟中子恒星二元合并中的起源是一致的。 2022。
The identification and localization of Fast Radio Bursts to their host galaxies has revealed important details about the progenitors of these mysterious, millisecond-long bursts of coherent radio emission. In this work we study the most probable host galaxy of the apparently non-repeating CHIME/FRB event FRB 20190425A -- a particularly high luminosity, low dispersion measure event that was demonstrated by Moroianu et al. 2022 to be temporally and spatially coincident with the LIGO-Virgo-KAGRA binary neutron star merger GW190425, suggesting an astrophysical association (p-value 0.0052). In this paper we remain agnostic to this result, and we confirm UGC10667 as the most probable host galaxy of FRB 20190425A, demonstrating that the host galaxies of low dispersion measure, one-off CHIME FRBs can be plausibly identified. We then perform multi-wavelength observations to characterize the galaxy and search for any afterglow emission associated with the FRB and its putative GW counterpart. We find no radio or optical transient emission in our observations $2.5\,\mathrm{yr}$ post-burst. UGC10667 is a spiral galaxy at $z\sim0.03$, dominated by an old stellar population. We find no evidence of a large population of young stars, with nebular emission dominated by star formation at a rate of $1-2\,\mathrm{M_\odot\,yr^{-1}}$. While we cannot rule out a young magnetar as the origin of FRB 20190425A, our observations are consistent with an origin in a long delay-time neutron star binary merger as posited by Moroianu et al. 2022.