The Role of Core-collapse Physics in the Observability of Black Hole Neutron Star Mergers as Multimessenger Sources
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The Role of Core-collapse Physics in the Observability of Black Hole Neutron Star Mergers as Multimessenger Sources. / Roman-Garza, Jaime; Bavera, Simone S.; Fragos, Tassos; Zapartas, Emmanouil; Misra, Devina; Andrews, Jeff; Coughlin, Scotty; Dotter, Aaron; Kovlakas, Konstantinos; Serra, Juan Gabriel; Qin, Ying; Rocha, Kyle A.; Tran, Nam Hai.
In: Astrophysical Journal Letters, Vol. 912, No. 2, 23, 06.05.2021.Research output: Contribution to journal › Letter › Research › peer-review
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TY - JOUR
T1 - The Role of Core-collapse Physics in the Observability of Black Hole Neutron Star Mergers as Multimessenger Sources
AU - Roman-Garza, Jaime
AU - Bavera, Simone S.
AU - Fragos, Tassos
AU - Zapartas, Emmanouil
AU - Misra, Devina
AU - Andrews, Jeff
AU - Coughlin, Scotty
AU - Dotter, Aaron
AU - Kovlakas, Konstantinos
AU - Serra, Juan Gabriel
AU - Qin, Ying
AU - Rocha, Kyle A.
AU - Tran, Nam Hai
PY - 2021/5/6
Y1 - 2021/5/6
N2 - Recent 1D core-collapse simulations indicate a nonmonotonicity of the explodability of massive stars with respect to their precollapse core masses, which is in contrast to commonly used prescriptions. In this work, we explore the implications of these results on the formation of coalescing black hole (BH)-neutron star (NS) binaries. Furthermore, we investigate the effects of natal kicks and the NS's radius on the synthesis of such systems and potential electromagnetic counterparts (EMCs) linked to them. Models based on 1D core-collapse simulations result in a BH-NS merger detection rate ( similar to 2.3 yr(-1)), 5-10 times larger than the predictions of "standard" prescriptions. This is primarily due to the formation of low-mass BHs via direct collapse, and hence no natal kicks, favored by the 1D simulations. The fraction of observed systems that will produce an EMC, with the supernova engine from 1D simulations, ranges from 2% to 25%, depending on the NS equation of state. Notably, in most merging systems with EMCs, the NS is the first-born compact object, as long as the NS's radius is less than or similar to 12 km. Furthermore, models with negligible kicks for low-mass BHs increase the detection rate of GW190426_152155-like events to similar to 0.6 yr(-1), with an associated probability of EMC
AB - Recent 1D core-collapse simulations indicate a nonmonotonicity of the explodability of massive stars with respect to their precollapse core masses, which is in contrast to commonly used prescriptions. In this work, we explore the implications of these results on the formation of coalescing black hole (BH)-neutron star (NS) binaries. Furthermore, we investigate the effects of natal kicks and the NS's radius on the synthesis of such systems and potential electromagnetic counterparts (EMCs) linked to them. Models based on 1D core-collapse simulations result in a BH-NS merger detection rate ( similar to 2.3 yr(-1)), 5-10 times larger than the predictions of "standard" prescriptions. This is primarily due to the formation of low-mass BHs via direct collapse, and hence no natal kicks, favored by the 1D simulations. The fraction of observed systems that will produce an EMC, with the supernova engine from 1D simulations, ranges from 2% to 25%, depending on the NS equation of state. Notably, in most merging systems with EMCs, the NS is the first-born compact object, as long as the NS's radius is less than or similar to 12 km. Furthermore, models with negligible kicks for low-mass BHs increase the detection rate of GW190426_152155-like events to similar to 0.6 yr(-1), with an associated probability of EMC
KW - COMPACT OBJECT FORMATION
KW - PAIR-INSTABILITY SUPERNOVAE
KW - X-RAY BINARIES
KW - MASS-TRANSFER
KW - COMMON-ENVELOPE
KW - CONVECTIVE BOUNDARIES
KW - GRAVITATIONAL-WAVES
KW - NATAL KICKS
KW - EVOLUTION
KW - PROGENITORS
U2 - 10.3847/2041-8213/abf42c
DO - 10.3847/2041-8213/abf42c
M3 - Letter
VL - 912
JO - The Astrophysical Journal Letters
JF - The Astrophysical Journal Letters
SN - 2041-8205
IS - 2
M1 - 23
ER -
ID: 269601792