Hypercritical accretion during common envelopes in triples leading to binary black holes in the pair-instability-supernova mass gap
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Hypercritical accretion during common envelopes in triples leading to binary black holes in the pair-instability-supernova mass gap. / Mendez, Enrique Moreno; De Colle, Fabio; Lopez-Camara, Diego; Vigna-Gomez, Alejandro.
I: Monthly Notices of the Royal Astronomical Society, Bind 522, Nr. 2, 21.04.2023, s. 1686-1696.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt
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T1 - Hypercritical accretion during common envelopes in triples leading to binary black holes in the pair-instability-supernova mass gap
AU - Mendez, Enrique Moreno
AU - De Colle, Fabio
AU - Lopez-Camara, Diego
AU - Vigna-Gomez, Alejandro
PY - 2023/4/21
Y1 - 2023/4/21
N2 - Hydrodynamic studies of stellar-mass compact objects (COs) in a common envelope (CE) have shown that the accretion rate onto the CO is a few orders of magnitude below the Bondi-Hoyle-Lyttleton (BHL) estimate. This is several orders of magnitude above the Eddington limit and above the limit for neutrino-cooled accretion (i.e. hypercritical accretion or HCA). Considering that a binary system inside the CE of a third star accretes material at nearly the same rate as a single object of the same total mass, we propose stellar-evolution channels which form binary black hole (BBH) systems with its component masses within the pair-instability supernova (PISN) mass gap. Our model is based on HCA onto the BBH system engulfed into the CE of a massive tertiary star. Furthermore, we propose a mass transfer mode which allows to store mass lost by the binary onto a third star. Through the use of population synthesis simulations for the evolution of BBHs and standard binary-evolution principles for the interaction with a tertiary star, we are able to produce BBHs masses consistent with those estimated for GW190521. We also discuss the massive binary system Mk34 as a possible progenitor of BBHs in the PISN gap.
AB - Hydrodynamic studies of stellar-mass compact objects (COs) in a common envelope (CE) have shown that the accretion rate onto the CO is a few orders of magnitude below the Bondi-Hoyle-Lyttleton (BHL) estimate. This is several orders of magnitude above the Eddington limit and above the limit for neutrino-cooled accretion (i.e. hypercritical accretion or HCA). Considering that a binary system inside the CE of a third star accretes material at nearly the same rate as a single object of the same total mass, we propose stellar-evolution channels which form binary black hole (BBH) systems with its component masses within the pair-instability supernova (PISN) mass gap. Our model is based on HCA onto the BBH system engulfed into the CE of a massive tertiary star. Furthermore, we propose a mass transfer mode which allows to store mass lost by the binary onto a third star. Through the use of population synthesis simulations for the evolution of BBHs and standard binary-evolution principles for the interaction with a tertiary star, we are able to produce BBHs masses consistent with those estimated for GW190521. We also discuss the massive binary system Mk34 as a possible progenitor of BBHs in the PISN gap.
KW - Accretion
KW - accretion discs
KW - stars: massive
KW - stars: black holes
KW - transients: black hole mergers
KW - stars: evolution
KW - DYNAMICAL FORMATION
KW - EVOLUTION
KW - STARS
KW - MERGER
KW - GROWTH
KW - SCENARIO
KW - PERTURBATIONS
KW - SIMULATIONS
KW - INCLINATION
KW - RADIATION
U2 - 10.1093/mnras/stad1082
DO - 10.1093/mnras/stad1082
M3 - Journal article
VL - 522
SP - 1686
EP - 1696
JO - Royal Astronomical Society. Monthly Notices
JF - Royal Astronomical Society. Monthly Notices
SN - 0035-8711
IS - 2
ER -
ID: 348161734