A search for host galaxies of potentially extragalactic rotating radio transients

作者：Rane A; Loeb A

来源：Monthly Notices of the Royal Astronomical Society, 2017, 467(1): L11-L15.

DOI：10.1093/mnrasl/slw245

• pulsars: general
• intergalactic medium

We report on a search for host galaxies of a subset of rotating radio transients (RRATs) that possess a dispersion measure (DM) near or above the maximum Galactic value in their direction. These RRATs could have an extragalactic origin and therefore be fast radio bursts (FRBs). The sizes of related galaxies on the sky at such short distances are comparable to the beam size of a single-dish telescope (for example, the 7.0 arcmin radius of the Parkes beam). Hence, the association, if found, could be more definitive as compared to finding host galaxies for more distant FRBs. We did not find any host galaxy associated with six RRATs near the maximum Galactic DM. This result is consistent with the fact that the probability of finding an FRB host galaxy within this volume is also very small, therefore indicating a Galactic origin. We propose that future follow-up observations of such RRATs be carried out in searching for local host galaxies as well as the sources of FRBs.

• 出版日期2017-5