16664
收藏DataCite Commons2023-04-21 更新2025-04-15 收录
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The repeating fast radio burst (FRB) 20200120E has been localized with 100 mas precision using the European VLBI network to a globular cluster (GC) in the halo of M81 comma a spiral galaxy at a distance of 3.63 Mpc. The proximity of the source lends itself to detailed analysis of the FRB.s environment as in the case of FRB 180916 (at a distance of 150 Mpc). GCs are known to be a hotbed of stellar interaction as proven by the presence of large populations of millisecond pulsars comma low mass X-ray binaries and catacylsmic variables. However comma the presence of FRB 20201020E in an low metallicity comma old stellar population GC is surprising compared to the locations of most other FRBs near star forming regions and the theoretical expectations of FRBs originating from extremely active neutron stars that are typically found in such star forming regions. We request a short WFC3-UVIS observation of the GC to measure its stellar density profile comma compactness comma dynamic state (i.e. whether it has undergone core-collapse) and perform precise astrometry with respect to the radio reference frame to localize the FRB within the GC.
提供机构:
European Space Agency
创建时间:
2023-04-21



