Detection Prospects of Electromagnetic Signatures from OGLE-2011-BLG-0462
Stellar-mass isolated black holes wandering in the interstellar medium are expected to be abundant in our Galaxy. Recently, an isolated free floating black hole (IsoBH), OGLE-2011-BLG-0462, was unambiguously discovered using astrometric microlensing. We examine prospects for detecting electromagneti...
Saved in:
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
IOP Publishing
2025-01-01
|
| Series: | The Astrophysical Journal |
| Subjects: | |
| Online Access: | https://doi.org/10.3847/1538-4357/add52c |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1849337092942856192 |
|---|---|
| author | Shigeo S. Kimura Lena Murchikova Kailash C. Sahu |
| author_facet | Shigeo S. Kimura Lena Murchikova Kailash C. Sahu |
| author_sort | Shigeo S. Kimura |
| collection | DOAJ |
| description | Stellar-mass isolated black holes wandering in the interstellar medium are expected to be abundant in our Galaxy. Recently, an isolated free floating black hole (IsoBH), OGLE-2011-BLG-0462, was unambiguously discovered using astrometric microlensing. We examine prospects for detecting electromagnetic signatures from an accretion flow surrounding the IsoBH. The accretion rate onto the IsoBH should be highly sub-Eddington, which leads to formation of a hot accretion flow. In this paper, we evaluate the detectability of electromagnetic signals from the hot accretion flows in two accretion states: magnetically arrested disk (MAD) and classical radiatively inefficient accretion flows (RIAFs). For the MAD scenario, we find that the optical, infrared, and X-ray signals can be detectable by the current best facilities, such as the Hubble Space Telescope, JWST, and Chandra, if the IsoBH is in a warm neutral medium. In contrast, for the classical RIAF scenario, the optical and X-ray emissions are weaker than the MAD scenario, leading to unobservable signals for a typical parameter set. Future follow-up observations of OGLE-2011-BLG-0462 will provide a good test for theories of accretion processes. |
| format | Article |
| id | doaj-art-d8fb81016711434d9b5d5b9c48a7e27c |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-d8fb81016711434d9b5d5b9c48a7e27c2025-08-20T03:44:47ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01986213510.3847/1538-4357/add52cDetection Prospects of Electromagnetic Signatures from OGLE-2011-BLG-0462Shigeo S. Kimura0https://orcid.org/0000-0003-2579-7266Lena Murchikova1https://orcid.org/0000-0001-8986-5403Kailash C. Sahu2https://orcid.org/0000-0001-6008-1955Frontier Research Institute for Interdisciplinary Sciences, Tohoku University , Sendai 980-8578, Japan ; shigeo@astr.tohoku.ac.jp; Astronomical Institute, Graduate School of Science, Tohoku University , Sendai 980-8578, JapanDepartment of Physics & Astronomy, Northwestern University , Evanston, IL 60208, USA; Center for Interdisciplinary Exploration and Research in Astrophysics, Northwestern University , Evanston, IL 60208, USA; School of Natural Sciences, Institute for Advanced Study , 1 Einstein Drive, Princeton, NJ 08540, USASchool of Natural Sciences, Institute for Advanced Study , 1 Einstein Drive, Princeton, NJ 08540, USA; Space Telescope Science Institute , 3700 San Martin Drive, Baltimore, MD 21218, USA; Eureka Scientific Inc. , 2542 Delmar Avenue, Suite 100, Oakland, CA 94602-3017, USAStellar-mass isolated black holes wandering in the interstellar medium are expected to be abundant in our Galaxy. Recently, an isolated free floating black hole (IsoBH), OGLE-2011-BLG-0462, was unambiguously discovered using astrometric microlensing. We examine prospects for detecting electromagnetic signatures from an accretion flow surrounding the IsoBH. The accretion rate onto the IsoBH should be highly sub-Eddington, which leads to formation of a hot accretion flow. In this paper, we evaluate the detectability of electromagnetic signals from the hot accretion flows in two accretion states: magnetically arrested disk (MAD) and classical radiatively inefficient accretion flows (RIAFs). For the MAD scenario, we find that the optical, infrared, and X-ray signals can be detectable by the current best facilities, such as the Hubble Space Telescope, JWST, and Chandra, if the IsoBH is in a warm neutral medium. In contrast, for the classical RIAF scenario, the optical and X-ray emissions are weaker than the MAD scenario, leading to unobservable signals for a typical parameter set. Future follow-up observations of OGLE-2011-BLG-0462 will provide a good test for theories of accretion processes.https://doi.org/10.3847/1538-4357/add52cAstrophysical black holesAccretionBlack holesBondi accretionNon-thermal radiation sources |
| spellingShingle | Shigeo S. Kimura Lena Murchikova Kailash C. Sahu Detection Prospects of Electromagnetic Signatures from OGLE-2011-BLG-0462 The Astrophysical Journal Astrophysical black holes Accretion Black holes Bondi accretion Non-thermal radiation sources |
| title | Detection Prospects of Electromagnetic Signatures from OGLE-2011-BLG-0462 |
| title_full | Detection Prospects of Electromagnetic Signatures from OGLE-2011-BLG-0462 |
| title_fullStr | Detection Prospects of Electromagnetic Signatures from OGLE-2011-BLG-0462 |
| title_full_unstemmed | Detection Prospects of Electromagnetic Signatures from OGLE-2011-BLG-0462 |
| title_short | Detection Prospects of Electromagnetic Signatures from OGLE-2011-BLG-0462 |
| title_sort | detection prospects of electromagnetic signatures from ogle 2011 blg 0462 |
| topic | Astrophysical black holes Accretion Black holes Bondi accretion Non-thermal radiation sources |
| url | https://doi.org/10.3847/1538-4357/add52c |
| work_keys_str_mv | AT shigeoskimura detectionprospectsofelectromagneticsignaturesfromogle2011blg0462 AT lenamurchikova detectionprospectsofelectromagneticsignaturesfromogle2011blg0462 AT kailashcsahu detectionprospectsofelectromagneticsignaturesfromogle2011blg0462 |