GBT22A-474

Molecular Gas in the Host Galaxy of FRB 20190520B

Abstract

We propose to probe the CO (1-0) emission line from the host galaxy of FRB 20190520B, a recently discovered repeating FRB with night dispersion measure, likely contributed by the highly varying ISM environment in the host galaxy. The JVLA observation shows that the FRB is co-locating with a persistent radio source (PRS) within the optical ionized emission from extended star formation regions of a dwarf galaxy at z = 0.241. The location of PRS is also covered by the ionized emission lines, presumably associated with the extended star formation activity of the dwarf galaxy. The proposed CO observation can yield a detection of S/N ~ 8 if this galaxy follows the SFR-L_CO relation. If a marginal CO line is detected, we will pursue a deeper CO observation and also seek the interferometric follow-up observation to better understand the properties of this FRB host dwarf galaxy.

Investigators

Name	Institution
Guodong Li	National Astronomical Observatories, CAS
Yinghui Zheng	National Astronomical Observatories, CAS
Chao-Wei Tsai *	California at Los Angeles, University of; Jet Propulsion Laboratory ; California Institute of Technology; National Astronomical Observatories, CAS
Jingwen Wu	California at Los Angeles, University of; National Astronomical Observatories, CAS
Chenhui Niu	National Astronomical Observatories, CAS
Di Li	National Astronomical Observatories, CAS; Space Science Institute
Mengyao Xue	National Astronomical Observatories, CAS
Yi Feng	National Astronomical Observatories, CAS

* indicates the PI