Details
| Original language | English |
|---|---|
| Pages (from-to) | 4554-4564 |
| Number of pages | 11 |
| Journal | Monthly Notices of the Royal Astronomical Society |
| Volume | 529 |
| Issue number | 4 |
| Early online date | 20 Mar 2024 |
| Publication status | Published - Apr 2024 |
Abstract
Super-Eddington accretion of neutron stars (NSs) has been suggested both observationally and theoretically. In this paper, we propose that NSs in close-orbit binary systems with companions of helium (He) stars, most of which systems form after the common-envelope phase, could experience super-Eddington stable Case BB/BC mass transfer (MT), and can sometimes undergo accretion-induced collapse (AIC), resulting in the formation of lower mass-gap black holes (mgBHs). Our detailed binary evolution simulations reveal that AIC events tend to happen if the primary NSs have an initial mass with a critical accretion rate of ≲300 times the Eddington limit. These mgBHs would have a mass nearly equal to or slightly higher than the NS maximum mass. The remnant mgBH-NS binaries after the core collapses of He stars are potential progenitors of gravitational-wave (GW) sources. Multimessenger observations between GW and kilonova signals from a population of high-mass binary NS and mgBH-NS mergers formed through super-Eddington stable MT are helpful in constraining the maximum mass and equation of state of NSs.
Keywords
- binaries: general, black hole-neutron star mergers, gravitational waves, stars: Wolf-Rayet
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Astronomy and Astrophysics
- Earth and Planetary Sciences(all)
- Space and Planetary Science
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In: Monthly Notices of the Royal Astronomical Society, Vol. 529, No. 4, 04.2024, p. 4554-4564.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Formation of lower mass-gap black hole-neutron star binary mergers through super-Eddington stable mass transfer
AU - Zhu, Jin Ping
AU - Qin, Ying
AU - Wang, Zhen Han Tao
AU - Hu, Rui Chong
AU - Zhang, Bing
AU - Wu, Shichao
N1 - Funding Information: This work was supported by Anhui Provincial Natural Science Foundation (grant no. 2308085MA29) and the Natural Science Foundation of Universities in Anhui Province (grant no. KJ2021A0106).
PY - 2024/4
Y1 - 2024/4
N2 - Super-Eddington accretion of neutron stars (NSs) has been suggested both observationally and theoretically. In this paper, we propose that NSs in close-orbit binary systems with companions of helium (He) stars, most of which systems form after the common-envelope phase, could experience super-Eddington stable Case BB/BC mass transfer (MT), and can sometimes undergo accretion-induced collapse (AIC), resulting in the formation of lower mass-gap black holes (mgBHs). Our detailed binary evolution simulations reveal that AIC events tend to happen if the primary NSs have an initial mass with a critical accretion rate of ≲300 times the Eddington limit. These mgBHs would have a mass nearly equal to or slightly higher than the NS maximum mass. The remnant mgBH-NS binaries after the core collapses of He stars are potential progenitors of gravitational-wave (GW) sources. Multimessenger observations between GW and kilonova signals from a population of high-mass binary NS and mgBH-NS mergers formed through super-Eddington stable MT are helpful in constraining the maximum mass and equation of state of NSs.
AB - Super-Eddington accretion of neutron stars (NSs) has been suggested both observationally and theoretically. In this paper, we propose that NSs in close-orbit binary systems with companions of helium (He) stars, most of which systems form after the common-envelope phase, could experience super-Eddington stable Case BB/BC mass transfer (MT), and can sometimes undergo accretion-induced collapse (AIC), resulting in the formation of lower mass-gap black holes (mgBHs). Our detailed binary evolution simulations reveal that AIC events tend to happen if the primary NSs have an initial mass with a critical accretion rate of ≲300 times the Eddington limit. These mgBHs would have a mass nearly equal to or slightly higher than the NS maximum mass. The remnant mgBH-NS binaries after the core collapses of He stars are potential progenitors of gravitational-wave (GW) sources. Multimessenger observations between GW and kilonova signals from a population of high-mass binary NS and mgBH-NS mergers formed through super-Eddington stable MT are helpful in constraining the maximum mass and equation of state of NSs.
KW - binaries: general
KW - black hole-neutron star mergers
KW - gravitational waves
KW - stars: Wolf-Rayet
UR - http://www.scopus.com/inward/record.url?scp=85192012291&partnerID=8YFLogxK
U2 - 10.48550/arXiv.2310.14256
DO - 10.48550/arXiv.2310.14256
M3 - Article
AN - SCOPUS:85192012291
VL - 529
SP - 4554
EP - 4564
JO - Monthly Notices of the Royal Astronomical Society
JF - Monthly Notices of the Royal Astronomical Society
SN - 0035-8711
IS - 4
ER -