Barrera, O. and Bartos, I. (2022) Ancestral Black Holes of Binary Merger GW190521. The Astrophysical Journal Letters, 929 (1). L1. ISSN 2041-8205
![[thumbnail of Barrera_2022_ApJL_929_L1.pdf]](http://publish7promo.com/style/images/fileicons/text.png)
Barrera_2022_ApJL_929_L1.pdf - Published Version
Download (550kB)
Abstract
GW190521 was the most massive black hole merger discovered by LIGO/Virgo so far, with masses in tension with stellar evolution models. A possible explanation of such heavy black holes is that they themselves are the remnants of previous mergers of lighter black holes. Here we estimate the masses of the ancestral black holes of GW190521, assuming it is the end product of previous mergers. We find that the heaviest parental black holes has a mass of ${56}_{-18}^{+20}$M⊙ (90% credible level). We find 70% probability that it is in the 50 M⊙–120 M⊙ mass gap, indicating that it may also be the end product of a previous merger. We therefore also compute the expected mass distributions of the "grandparent" black holes of GW190521, assuming they existed. Ancestral black hole masses could represent an additional puzzle piece in identifying the origin of LIGO/Virgo/KAGRA's heaviest black holes.
Item Type: | Article |
---|---|
Subjects: | Euro Archives > Physics and Astronomy |
Depositing User: | Managing Editor |
Date Deposited: | 13 Sep 2023 04:43 |
Last Modified: | 13 Sep 2023 04:43 |
URI: | http://publish7promo.com/id/eprint/3042 |