Author:
Qiang Da-Chun,Li Shu-Ling,Wei Hao
Abstract
Abstract
Currently, fast radio bursts (FRBs) have become a very active field in
astronomy and cosmology. However, the origin of FRBs is still unknown to
date. The studies on the intrinsic FRB distributions might help us to
reveal the possible origins of FRBs, and improve the simulations for
FRB cosmology. Recently, the first CHIME/FRB catalog of 536 events was
released. Such a large uniform sample of FRBs detected by a single
telescope is very valuable to test the FRB distributions. Later, it has
been claimed that the FRB distribution model tracking the cosmic star
formation history (SFH) was rejected by the first CHIME/FRB catalog. In the
present work, we consider some empirical FRB distribution models, and find
that many of them can be fully consistent with the CHIME/FRB observational
data for some suitable model parameters. Notice that a suppressed evolution
with respect to SFH is commonly found for FRBs. In particular,
we independently confirm that the FRB distribution model tracking SFH
can be rejected at very high confidence. On the other hand, all the
"successful" models effectively require a certain degree
of "delay" with respect to SFH. These results might shed light on the
origin of FRBs and FRB cosmology.
Subject
Astronomy and Astrophysics
Cited by
9 articles.
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