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Published August 2021 | Published + Accepted Version
Journal Article Open

Multiwavelength detectability of isolated black holes in the Milky Way

Abstract

Isolated black holes in our Galaxy have eluded detection so far. We present here a comprehensive study on the detectability of isolated stellar-mass astrophysical black holes that accrete interstellar gas from molecular clouds in both the local region and the Central Molecular Zone. We adopt a state-of-the-art model for the accretion physics backed up by numerical simulations, and study the number of observable sources in both the radio and X-ray band, as a function of a variety of parameters. We discuss in particular the impact of the astrophysical uncertainties on our prediction for the number of bright X-ray sources in the central region of the Galaxy. We finally consider future developments in the radio domain and assess the potential of SKA to detect a population of astrophysical black holes accreting gas in our Galaxy.

Additional Information

© 2021 The Author(s). Published by Oxford University Press on behalf of Royal Astronomical Society. This article is published and distributed under the terms of the Oxford University Press, Standard Journals Publication Model (https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model). Accepted 2021 May 20. Received 2021 April 27; in original form 2020 December 21. Published: 27 May 2021. The work of DG and FS has received financial support through the Postdoctoral Junior Leader Fellowship Programme from la Caixa Banking Foundation (grant no. LCF/BQ/LI18/11630014). DG was also supported by the Spanish Agencia Estatal de Investigación through the grants PGC2018-095161-B-I00, IFT Centro de Excelencia Severo Ochoa SEV-2016-0597, and Red Consolider MultiDark FPA2017-90566-REDC. MR acknowledges support by NASA grant no. 80NSSC18K0527. RMTC has been supported by NASA ADAP grant no. 80NSSC177K0515. Data Availability: No new data were generated or analysed in support of this research.

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Published - stab1533.pdf

Accepted Version - 2012.10421.pdf

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Created:
August 20, 2023
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October 23, 2023