The cosmic merger rate of stellar black hole binaries from the Illustris simulation
| Autor: | Nicola Giacobbo, Mario Spera, Michela Mapelli, E. Ripamonti |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
astro-ph.SR astro-ph.GA FOS: Physical sciences Astrophysics 01 natural sciences Gravitational waves Common envelope Settore FIS/05 - Astronomia e Astrofisica 0103 physical sciences GW151226 Stars: black holes Stars: mass-loss 010303 astronomy & astrophysics Solar and Stellar Astrophysics (astro-ph.SR) Physics High Energy Astrophysical Phenomena (astro-ph.HE) astro-ph.HE astro-ph.CO Methods: numerical 010308 nuclear & particles physics Gravitational wave Star formation Astronomy Astronomy and Astrophysics Black hole physics Astrophysics - Astrophysics of Galaxies LIGO Redshift Supernova Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Astrophysics of Galaxies (astro-ph.GA) Stellar black hole Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Cosmology and Nongalactic Astrophysics |
| Popis: | The cosmic merger rate density of black hole binaries (BHBs) can give us an essential clue to constraining the formation channels of BHBs, in light of current and forthcoming gravitational wave detections. Following a Monte Carlo approach, we couple new population-synthesis models of BHBs with the Illustris cosmological simulation, to study the cosmic history of BHB mergers. We explore six population-synthesis models, varying the prescriptions for supernovae, common envelope, and natal kicks. In most considered models, the cosmic BHB merger rate follows the same trend as the cosmic star formation rate. The normalization of the cosmic BHB merger rate strongly depends on the treatment of common envelope and on the distribution of natal kicks. We find that most BHBs merging within LIGO's instrumental horizon come from relatively metal-poor progenitors ( 16 pages, 12 figures, 6 tables, accepted for publication in MNRAS |
| Databáze: | OpenAIRE |
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