期刊
ASTROPHYSICAL JOURNAL LETTERS
卷 867, 期 1, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/2041-8213/aae7cb
关键词
galaxies: individual (ESO 601-G036); galaxies: spiral; radio continuum: galaxies
资金
- ESO programme [0101.A-0455(B)]
- Australian Research Council [DP180100857]
- Australian Research Council (ARC) [FL150100148, CE17010000]
- Australian Government
- [GS-2018A-Q-205]
We report on a search for the host galaxy of FRB 171020, the fast radio burst (FRB) with the smallest recorded dispersion measure (DM; DM = 114 pc cm(-3)) of our ongoing ASKAP survey. The low DM confines the burst location within a sufficiently small volume to rigorously constrain the identity of the host galaxy. We identify 16 candidate galaxies in the search volume and single out ESO 601-G036, an Sc galaxy at redshift z = 0.00867, as the most likely host galaxy. Ultraviolet and optical imaging and spectroscopy reveal that this galaxy has a star formation rate of approximately 0.1 M-circle dot yr(-1) and oxygen abundance 12 + log(O/H) = 8.3 +/- 0.2, properties that are remarkably consistent with the galaxy hosting the repeating FRB 121102. However, in contrast to FRB 121102, follow-up radio observations of ESO 601-G036 show no compact radio emission above a 5 sigma limit of L-2.1GHz = 3.6 x 10(19) W Hz(-1). Using radio continuum observations of the field, combined with archival optical imaging data, we find no analog to the persistent radio source associated with FRB 121102 within the localization region of FRB 171020 out to z = 0.06. These results suggest that FRBs are not necessarily associated with a luminous and compact radio continuum source.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据