Compact Binary Merger Rate in Dark-matter Spikes
Today, the existence of supermassive black holes (SMBHs) in the center of galactic halos is almost confirmed. An extremely dense region referred to as dark-matter spike is expected to form around central SMBHs as they grow and evolve adiabatically. In this work, we calculate the merger rate of compa...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/acc1dd |
| _version_ | 1797701063613087744 |
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| author | Saeed Fakhry Zahra Salehnia Azin Shirmohammadi Mina Ghodsi Yengejeh Javad T. Firouzjaee |
| author_facet | Saeed Fakhry Zahra Salehnia Azin Shirmohammadi Mina Ghodsi Yengejeh Javad T. Firouzjaee |
| author_sort | Saeed Fakhry |
| collection | DOAJ |
| description | Today, the existence of supermassive black holes (SMBHs) in the center of galactic halos is almost confirmed. An extremely dense region referred to as dark-matter spike is expected to form around central SMBHs as they grow and evolve adiabatically. In this work, we calculate the merger rate of compact binaries in dark-matter spikes while considering halo models with spherical and ellipsoidal collapses. Our findings exhibit that ellipsoidal-collapse dark-matter halo models can potentially yield the enhancement of the merger rate of compact binaries. Finally, our results confirm that the merger rate of primordial black hole binaries is consistent with the results estimated by the LIGO-Virgo detectors, while such results cannot be realized for binary neutron stars and primordial black hole-neutron star binaries. |
| first_indexed | 2024-03-12T04:29:56Z |
| format | Article |
| id | doaj.art-95b0950fbe414a018d6637f927f72ebf |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T04:29:56Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-95b0950fbe414a018d6637f927f72ebf2023-09-03T10:07:59ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0194724610.3847/1538-4357/acc1ddCompact Binary Merger Rate in Dark-matter SpikesSaeed Fakhry0https://orcid.org/0000-0002-6349-8489Zahra Salehnia1Azin Shirmohammadi2Mina Ghodsi Yengejeh3Javad T. Firouzjaee4https://orcid.org/0000-0003-3229-3429Department of Physics, Shahid Beheshti University , Evin, Tehran 19839, Iran ; s_fakhry@sbu.ac.ir; PDAT Laboratory, Department of Physics, K.N. Toosi University of Technology , P.O. Box 15875-4416, Tehran, Iran ; zahra.salehnia@email.kntu.ac.irPDAT Laboratory, Department of Physics, K.N. Toosi University of Technology , P.O. Box 15875-4416, Tehran, Iran ; zahra.salehnia@email.kntu.ac.ir; Department of Physics, K.N. Toosi University of Technology , P.O. Box 15875-4416, Tehran, Iran ; azinshr@email.kntu.ac.irPDAT Laboratory, Department of Physics, K.N. Toosi University of Technology , P.O. Box 15875-4416, Tehran, Iran ; zahra.salehnia@email.kntu.ac.ir; Department of Physics, K.N. Toosi University of Technology , P.O. Box 15875-4416, Tehran, Iran ; azinshr@email.kntu.ac.irDepartment of Physics, Shahid Beheshti University , Evin, Tehran 19839, Iran ; s_fakhry@sbu.ac.ir; PDAT Laboratory, Department of Physics, K.N. Toosi University of Technology , P.O. Box 15875-4416, Tehran, Iran ; zahra.salehnia@email.kntu.ac.irPDAT Laboratory, Department of Physics, K.N. Toosi University of Technology , P.O. Box 15875-4416, Tehran, Iran ; zahra.salehnia@email.kntu.ac.ir; Department of Physics, K.N. Toosi University of Technology , P.O. Box 15875-4416, Tehran, Iran ; azinshr@email.kntu.ac.ir; School of Physics, Institute for Research in Fundamental Sciences (IPM) , P.O. Box 19395-5531, Tehran, Iran ; m.ghodsi.y@gmail.com, firouzjaee@kntu.ac.irToday, the existence of supermassive black holes (SMBHs) in the center of galactic halos is almost confirmed. An extremely dense region referred to as dark-matter spike is expected to form around central SMBHs as they grow and evolve adiabatically. In this work, we calculate the merger rate of compact binaries in dark-matter spikes while considering halo models with spherical and ellipsoidal collapses. Our findings exhibit that ellipsoidal-collapse dark-matter halo models can potentially yield the enhancement of the merger rate of compact binaries. Finally, our results confirm that the merger rate of primordial black hole binaries is consistent with the results estimated by the LIGO-Virgo detectors, while such results cannot be realized for binary neutron stars and primordial black hole-neutron star binaries.https://doi.org/10.3847/1538-4357/acc1ddDark matterPrimordial black holesNeutron starsSupermassive black holesGravitational waves |
| spellingShingle | Saeed Fakhry Zahra Salehnia Azin Shirmohammadi Mina Ghodsi Yengejeh Javad T. Firouzjaee Compact Binary Merger Rate in Dark-matter Spikes The Astrophysical Journal Dark matter Primordial black holes Neutron stars Supermassive black holes Gravitational waves |
| title | Compact Binary Merger Rate in Dark-matter Spikes |
| title_full | Compact Binary Merger Rate in Dark-matter Spikes |
| title_fullStr | Compact Binary Merger Rate in Dark-matter Spikes |
| title_full_unstemmed | Compact Binary Merger Rate in Dark-matter Spikes |
| title_short | Compact Binary Merger Rate in Dark-matter Spikes |
| title_sort | compact binary merger rate in dark matter spikes |
| topic | Dark matter Primordial black holes Neutron stars Supermassive black holes Gravitational waves |
| url | https://doi.org/10.3847/1538-4357/acc1dd |
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