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Title: Dispersion measure distributions of fast radio bursts due to the intergalactic medium
ABSTRACT Utilizing cosmological hydrodynamic simulations, we quantify the distributions of the dispersion measure (DM) of fast radio bursts (FRBs). We examine the contributions of cold, warm-hot, and hot gas to the total DM. We find that the hot gas component (T > 107K), on average, makes a minor contribution ($$\le 5{{\ \rm per\ cent}}$$) to the overall DM. Cold (T < 105K) and warm-hot (T = 105 − 107K) gas components make comparable contributions to DM for FRBs at z = 1, with the former component making an increasingly larger contribution towards higher redshift. We provide a detailed DM distribution of FRBs at z = 0.25 to z = 2 that may be compared to observations. We also compute the relation between the Compton y parameter and DM, finding a strong correlation, y∝DM4, providing an additional, independent constraint on the nature of the DM of FRBs.  more » « less
Award ID(s):
2007390
PAR ID:
10479389
Author(s) / Creator(s):
;
Publisher / Repository:
Oxford Academic
Date Published:
Journal Name:
Monthly Notices of the Royal Astronomical Society
Volume:
502
Issue:
3
ISSN:
0035-8711
Page Range / eLocation ID:
3664 to 3669
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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