S18B0007abst

S18B0007

A fast radio burst (FRB) is a bright millisecond radio transients that had been first discovered in a search of archival data of Parkes Radio Telescope. Its dispersion measure (DM) could be an probe of “missing” baryon and/or magnetic fields and turbulence in IGM. However, its origin is still under debate. In the S15B-009 runs, we had performed HSC follow-up observations of FRB 151230 over ∼1 week and found that the difference light curve of no candidate is fitted with SNe Ia. This excludes the association of SNe Ia at z≤0.6 with FRB 151230 and leaves a room for the association between an SN Ia and FRB 151230 only at z∼0.6−0.8 with the maximum redshift inferred from the DM of FRB 151230. Here, we propose to obtain deep reference images with sufficient time intervals. With the deep reference image, our previous observations are deep enough to detect typical SNe Ia at z≤1.1. If FRB 151230 is associated with an SN Ia, the SN Ia with the same explosion date as FRB 151230 is detected. The coincident detection of an SN Ia irrelevant to FRB 151230 is unlikely. If no candidate is matched with SNe Ia, the association between FRBs and SNe Ia and the white dwarf merger scenario are excluded. This draws the conclusion about the association between FRBs and SNe Ia.

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