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Saracino, S, Kamann, S, Guarcello, MG, Usher, CG, Bastian, N, Cabrera-Ziri, I, Gieles, M, Dreizler, S, Costa, GSD, Husser, T-O and Hénault-Brunet, V (2021) A black hole detected in the young massive LMC cluster NGC 1850. Monthly Notices of the Royal Astronomical Society, 511. pp. 2914-2924. ISSN 0035-8711
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A black hole detected in the young massive LMC cluster NGC 1850.pdf - Published Version Download (2MB) | Preview |
Abstract
We report the detection of a black hole (NGC 1850 BH1) in the $\sim$100 Myr-old massive cluster NGC~1850 in the Large Magellanic Cloud. It is in a binary system with a main-sequence turn-off star (4.9 $\pm$ 0.4 M${_\odot}$), which is starting to fill its Roche Lobe and becoming distorted. Using 17 epochs of VLT/MUSE observations we detected radial velocity variations exceeding 300 km/s associated to the target star, linked to the ellipsoidal variations measured by OGLE-IV in the optical bands. Under the assumption of a semi-detached system, the simultaneous modelling of radial velocity and light curves constraints the orbital inclination of the binary to ($38 \pm 2$)$^{\circ}$, resulting in a true mass of the unseen companion of $11.1_{-2.4}^{+2.1}$ $M_{\odot}$. This represents the first direct dynamical detection of a black hole in a young massive cluster, opening up the possibility of studying the initial mass function and the early dynamical evolution of such compact objects in high-density environments.
| Item Type: | Article |
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| Additional Information: | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society ©: 2021 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. |
| Uncontrolled Keywords: | astro-ph.GA; astro-ph.GA; astro-ph.SR |
| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
| Divisions: | Astrophysics Research Institute |
| Publisher: | Oxford University Press |
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| Date Deposited: | 19 Nov 2021 11:43 |
| Last Modified: | 25 Feb 2022 12:30 |
| DOI or ID number: | 10.1093/mnras/stab3159 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/15804 |
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