Probing the progenitors of spinning binary black-hole mergers with long gamma-ray bursts
Autor: | Bavera, Simone S., Fragos, Tassos, Zapartas, Emmanouil, Ramirez-Ruiz, Enrico, Marchant, Pablo, Kelley, Luke Z., Zevin, Michael, Andrews, Jeff J., Coughlin, Scott, Dotter, Aaron, Kovlakas, Konstantinos, Misra, Devina, Serra-Perez, Juan G., Qin, Ying, Rocha, Kyle A., Román-Garza, Jaime, Tran, Nam H., Xing, Zepei |
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Rok vydání: | 2021 |
Předmět: | |
Druh dokumentu: | Working Paper |
DOI: | 10.1051/0004-6361/202141979 |
Popis: | Long-duration gamma-ray bursts are thought to be associated with the core-collapse of massive, rapidly spinning stars and the formation of black holes. However, efficient angular momentum transport in stellar interiors, currently supported by asteroseismic and gravitational-wave constraints, leads to predominantly slowly-spinning stellar cores. Here, we report on binary stellar evolution and population synthesis calculations, showing that tidal interactions in close binaries not only can explain the observed sub-population of spinning, merging binary black holes but also lead to long gamma-ray bursts at the time of black-hole formation. Given our model calibration against the distribution of isotropic-equivalent energies of luminous long gamma-ray bursts, we find that ~10% of the GWTC-2 reported binary black holes had a luminous long gamma-ray burst associated with their formation, with GW190517 and GW190719 having a probability of ~85% and ~60%, respectively, being among them. Moreover, given an assumption about their average beaming fraction, our model predicts the rate density of long gamma-ray bursts, as a function of redshift, originating from this channel. For a constant beaming fraction $f_\mathrm{B}\sim 0.05$ our model predicts a rate density comparable to the observed one, throughout the redshift range, while, at redshift $z \in [0,2.5]$, a tentative comparison with the metallicity distribution of observed LGRB host galaxies implies that between 20% to 85% of the observed long gamma-ray bursts may originate from progenitors of merging binary black holes. The proposed link between a potentially significant fraction of observed, luminous long gamma-ray bursts and the progenitors of spinning binary black-hole mergers allows us to probe the latter well outside the horizon of current-generation gravitational wave observatories, and out to cosmological distances. Comment: Accepted for publication in A&A Letters, 12 pages, 6 figures, 1 table |
Databáze: | arXiv |
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