Impact of massive binary star and cosmic evolution on gravitational wave observations I

Autor: S. P. Stevenson, Ilya Mandel, Alejandro Vigna-Gómez, Edo Berger, Stephen Justham, Debatri Chattopadhyay, Floor S. Broekgaarden, Martyna Chruslinska, Selma E. de Mink, Coenraad J. Neijssel
Přispěvatelé: Low Energy Astrophysics (API, FNWI)
Jazyk: angličtina
Rok vydání: 2021
Předmět:
Star (game theory)
Astronomy
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
01 natural sciences
COMPACT OBJECTS
MAXIMUM MASS
DIFFERENT METALLICITIES
0103 physical sciences
Binary star
CORE-COLLAPSE
010303 astronomy & astrophysics
Stellar evolution
Astrophysics::Galaxy Astrophysics
RATIO DISTRIBUTION
High Energy Astrophysical Phenomena (astro-ph.HE)
Physics
GAMMA-RAY BURSTS
010308 nuclear & particles physics
Star formation
COMMON ENVELOPE EVOLUTION
BINDING-ENERGY PARAMETER
Order (ring theory)
Astronomy and Astrophysics
EQUATION-OF-STATE
Black hole
Neutron star
Supernova
ELECTRON-CAPTURE SUPERNOVAE
gravitational waves
13. Climate action
Space and Planetary Science
evolution [stars]
) black hole-neutron star mergers [(transients]
Astrophysics - High Energy Astrophysical Phenomena
Zdroj: Monthly Notices of the Royal Astronomical Society, 508(4), 5028-5063. Oxford University Press
Monthly Notices of the Royal Astronomical Society, 508, 4, pp. 5028-5063
Broekgaarden, F S, Berger, E, Neijssel, C J, Vigna-Gomez, A, Chattopadhyay, D, Stevenson, S, Chruslinska, M, Justham, S, de Mink, S E & Mandel, I 2021, ' Impact of massive binary star and cosmic evolution on gravitational wave observations I : black hole-neutron star mergers ', Monthly Notices of the Royal Astronomical Society, vol. 508, no. 4, pp. 5028-5063 . https://doi.org/10.1093/mnras/stab2716
Monthly Notices of the Royal Astronomical Society, 508, 5028-5063
ISSN: 1365-2966
0035-8711
DOI: 10.1093/mnras/stab2716
Popis: Mergers of black hole-neutron star (BHNS) binaries have now been observed by GW detectors with the recent announcement of GW200105 and GW200115. Such observations not only provide confirmation that these systems exist, but will also give unique insights into the death of massive stars, the evolution of binary systems and their possible association with gamma-ray bursts, $r$-process enrichment and kilonovae. Here we perform binary population synthesis of isolated BHNS systems in order to present their merger rate and characteristics for ground-based GW observatories. We present the results for 420 different model permutations that explore key uncertainties in our assumptions about massive binary star evolution (e.g. mass transfer, common-envelope evolution, supernovae), and the metallicity-specific star formation rate density, and characterize their relative impacts on our predictions. We find intrinsic local BHNS merger rates spanning $\mathcal{R}_{\rm{m}}^0 \approx 4$-$830\,\rm{Gpc}^{-3}\,\rm{yr}^{-1}$ for our full range of assumptions. This encompasses the rate inferred from recent BHNS GW detections, and would yield detection rates of $\mathcal{R}_{\rm{det}} \approx 1$-$180\, \rm{yr}^{-1}$ for a GW network consisting of LIGO, Virgo and KAGRA at design sensitivity. We find that the binary evolution and metallicity-specific star formation rate density each impact the predicted merger rates by order $\mathcal{O}(10)$. We also present predictions for the GW detected BHNS merger properties and find that all 420 model variations predict that $\lesssim 5\%$ of the BHNS mergers have BH masses $\gtrsim 18\,M_{\odot}$, total masses $ \gtrsim 20\,M_{\odot}$, chirp masses $\gtrsim 5.5\,M_{\odot}$, mass ratios $ \gtrsim 12$ or $\lesssim 2$. Moreover, we find that massive NSs $\gtrsim 2\,M_{\odot}$ are expected to be commonly detected in BHNS mergers in almost all our model variations.
38 pages, 18 figures, accepted to MNRAS. The authors welcome suggestions and feedback. All data and code to reproduce the results in this paper are publicly available
Databáze: OpenAIRE
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