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Multiwavelength detectability of isolated black holes in the Milky Way

Scarcella, Francesca and Gaggero, Daniele and Connors, Riley and Manshanden, Julien and Ricotti, Massimo and Bertone, Gianfranco (2021) Multiwavelength detectability of isolated black holes in the Milky Way. Monthly Notices of the Royal Astronomical Society, 505 (3). pp. 4036-4047. ISSN 0035-8711. doi:10.1093/mnras/stab1533.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Gaggero, Daniele0000-0003-3534-1406
Connors, Riley0000-0002-8908-759X
Ricotti, Massimo0000-0003-4223-7324
Bertone, Gianfranco0000-0002-6191-1487
Alternate Title:Multi-wavelength detectability of isolated black holes in the Milky Way
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 ( 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.
Funding AgencyGrant Number
la Caixa Banking FoundationLCF/BQ/LI18/11630014
Agencia Estatal de InvestigaciónPGC2018-095161-B-I00
Centro de Excelencia Severo OchoaSEV-2016-0597
Ministerio de Economía, Industria y Competitividad (MINECO)FPA2017-90566-REDC
Subject Keywords:astroparticle physics – black hole physics – ISM: jets and outflows
Issue or Number:3
Record Number:CaltechAUTHORS:20210915-223634303
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Official Citation:Francesca Scarcella, Daniele Gaggero, Riley Connors, Julien Manshanden, Massimo Ricotti, Gianfranco Bertone, Multiwavelength detectability of isolated black holes in the Milky Way, Monthly Notices of the Royal Astronomical Society, Volume 505, Issue 3, August 2021, Pages 4036–4047,
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:110911
Deposited By: Tony Diaz
Deposited On:16 Sep 2021 17:18
Last Modified:16 Sep 2021 17:18

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