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arXiv 2108.01282astro-ph.HEastro-ph.GA
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表征FRB宿主星系群及其与本地和河外宇宙瞬变的联系

Characterizing the FRB host galaxy population and its connection to transients in the local and extragalactic Universe

Shivani Bhandari, Kasper E. Heintz, Kshitij Aggarwal, Lachlan Marnoch, Cherie K. Day, Jessica Sydnor, Sarah Burke-Spolaor, Casey J. Law, J. Xavier Prochaska, Ni… 展开作者

Shivani Bhandari, Kasper E. Heintz, Kshitij Aggarwal, Lachlan Marnoch, Cherie K. Day, Jessica Sydnor, Sarah Burke-Spolaor, Casey J. Law, J. Xavier Prochaska, Nicolas Tejos, Keith W. Bannister, Bryan J. Butler, Adam T. Deller, R. D. Ekers, Chris Flynn, Wen-fai Fong, Clancy W. James, T. Joseph W. Lazio, Rui Luo, Elizabeth K. Mahony, Stuart D. Ryder, Elaine M. Sadler, Ryan M. Shannon, JinLin Han, Kejia Lee, Bing Zhang

摘要:

我们提出了一个重复和两个明显不重复的快速射电暴的本地化和宿主星系。使用Karl G检测并定位FRB 20180301 A。Jansky甚大阵到$z=0.3304$的恒星形成星系。FRB 20191228 A和FRB 20200906 A分别被澳大利亚平方公里阵列探路者探测到并定位在$z=0.2430$和$z=0.3688$的宿主星系。我们结合这些与其他13个本地化的FRB在文献中,并分析宿主星系的属性。我们发现没有显着差异的主机属性的重复和显然不重复的FRB。FRB宿主是中等恒星形成的,质量稍微偏离恒星形成的主序。恒星形成和低电离核发射线区(LINER)的发射是FRB宿主星系电离的主要来源,前者在重复FRB宿主星系中占主导地位。FRB主机不跟踪恒星质量和恒星形成所看到的场星系(超过95%的信心)。FRB在大质量的红星系中是罕见的,这表明祖先形成通道并不仅仅是由延迟通道所主导的,延迟通道滞后于Gigayears的恒星形成。FRB宿主的整体性质与核心坍缩超新星(CCSNe)和短伽马射线暴(SGRB)宿主没有区别,FRB的空间偏移(从星系中心)与银河系中子星种群的空间偏移(95%置信度)大多不一致。FRB的空间偏移(归一化到星系有效半径)也不同于晚型和早型星系中的球状星团(GC),置信度为95%。

英文摘要:

We present the localization and host galaxies of one repeating and two apparently non-repeating Fast Radio Bursts. FRB20180301A was detected and localized with the Karl G. Jansky Very Large Array to a star-forming galaxy at $z=0.3304$. FRB20191228A, and FRB20200906A were detected and localized by the Australian Square Kilometre Array Pathfinder to host galaxies at $z=0.2430$ and $z=0.3688$, respectively. We combine these with 13 other well-localized FRBs in the literature, and analyze the host galaxy properties. We find no significant differences in the host properties of repeating and apparently non-repeating FRBs. FRB hosts are moderately star-forming, with masses slightly offset from the star-forming main-sequence. Star formation and low-ionization nuclear emission-line region (LINER) emission are major sources of ionization in FRB host galaxies, with the former dominant in repeating FRB hosts. FRB hosts do not track stellar mass and star formation as seen in field galaxies (more than 95% confidence). FRBs are rare in massive red galaxies, suggesting that progenitor formation channels are not solely dominated by delayed channels which lag star formation by Gigayears. The global properties of FRB hosts are indistinguishable from core-collapse supernovae (CCSNe) and short gamma-ray bursts (SGRBs) hosts, and the spatial offset (from galaxy centers) of FRBs is mostly inconsistent with that of the Galactic neutron star population (95% confidence). The spatial offsets of FRBs (normalized to the galaxy effective radius) also differ from those of globular clusters (GCs) in late- and early-type galaxies with 95% confidence.

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