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Article: Has LIGO detected primordial black hole dark matter? - tidal disruption in binary black hole formation
Title | Has LIGO detected primordial black hole dark matter? - tidal disruption in binary black hole formation |
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Authors | |
Keywords | black hole physics dark matter gravitational waves quasars supermassive black holes |
Issue Date | 2020 |
Publisher | Institute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/1674-4527/ |
Citation | Research in Astronomy and Astrophysics, 2020, v. 20 n. 11, p. article no. 185 How to Cite? |
Abstract | The frequent detection of binary mergers of ~30 M⊙ black holes (BHs) by the Laser Interferometer Gravitational-Wave Observatory (LIGO) rekindled researchers' interest in primordial BHs (PBHs) being dark matter (DM). In this work, we investigated PBHs distributed as DM with a monochromatic mass of 30 M⊙ and examined the encounter-capture scenario of binary formation, where the densest central region of DM halo dominates. Thus, we paid special attention to the tidal effect by the supermassive black hole (SMBH) present. In doing so, we discovered a necessary tool called loss zone that complements the usage of loss cone. We found that the tidal effect is not prominent in affecting binary formation, which also turned out to be insufficient in explaining the totality of LIGO's event rate estimation, especially due to a microlensing event constraining the DM fraction in PBH at the mass of interest from near unity to an order smaller. Meanwhile, an early-universe binary formation scenario proves so prevailing that the LIGO signal in turn constrains the PBH fraction below one percent. Thus, people should put more faith in alternative PBH windows and other DM candidates. |
Persistent Identifier | http://hdl.handle.net/10722/295262 |
ISSN | 2023 Impact Factor: 1.8 2023 SCImago Journal Rankings: 0.641 |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | GAO, Y | - |
dc.contributor.author | Zhang, XJ | - |
dc.contributor.author | Su, M | - |
dc.date.accessioned | 2021-01-11T13:57:37Z | - |
dc.date.available | 2021-01-11T13:57:37Z | - |
dc.date.issued | 2020 | - |
dc.identifier.citation | Research in Astronomy and Astrophysics, 2020, v. 20 n. 11, p. article no. 185 | - |
dc.identifier.issn | 1674-4527 | - |
dc.identifier.uri | http://hdl.handle.net/10722/295262 | - |
dc.description.abstract | The frequent detection of binary mergers of ~30 M⊙ black holes (BHs) by the Laser Interferometer Gravitational-Wave Observatory (LIGO) rekindled researchers' interest in primordial BHs (PBHs) being dark matter (DM). In this work, we investigated PBHs distributed as DM with a monochromatic mass of 30 M⊙ and examined the encounter-capture scenario of binary formation, where the densest central region of DM halo dominates. Thus, we paid special attention to the tidal effect by the supermassive black hole (SMBH) present. In doing so, we discovered a necessary tool called loss zone that complements the usage of loss cone. We found that the tidal effect is not prominent in affecting binary formation, which also turned out to be insufficient in explaining the totality of LIGO's event rate estimation, especially due to a microlensing event constraining the DM fraction in PBH at the mass of interest from near unity to an order smaller. Meanwhile, an early-universe binary formation scenario proves so prevailing that the LIGO signal in turn constrains the PBH fraction below one percent. Thus, people should put more faith in alternative PBH windows and other DM candidates. | - |
dc.language | eng | - |
dc.publisher | Institute of Physics Publishing Ltd. The Journal's web site is located at http://iopscience.iop.org/1674-4527/ | - |
dc.relation.ispartof | Research in Astronomy and Astrophysics | - |
dc.rights | Research in Astronomy and Astrophysics. Copyright © Institute of Physics Publishing Ltd. | - |
dc.rights | This is an author-created, un-copyedited version of an article published in [insert name of journal]. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at http://dx.doi.org/[insert DOI]. | - |
dc.subject | black hole physics | - |
dc.subject | dark matter | - |
dc.subject | gravitational waves | - |
dc.subject | quasars | - |
dc.subject | supermassive black holes | - |
dc.title | Has LIGO detected primordial black hole dark matter? - tidal disruption in binary black hole formation | - |
dc.type | Article | - |
dc.identifier.email | Su, M: mengsu84@hku.hk | - |
dc.identifier.authority | Su, M=rp02150 | - |
dc.description.nature | link_to_subscribed_fulltext | - |
dc.identifier.doi | 10.1088/1674-4527/20/11/185 | - |
dc.identifier.scopus | eid_2-s2.0-85097243399 | - |
dc.identifier.hkuros | 320825 | - |
dc.identifier.volume | 20 | - |
dc.identifier.issue | 11 | - |
dc.identifier.spage | article no. 185 | - |
dc.identifier.epage | article no. 185 | - |
dc.identifier.isi | WOS:000593527600001 | - |
dc.publisher.place | United Kingdom | - |