A black hole detected in the young massive LMC cluster NGC 1850
We report on the detection of a black hole (NGC 1850 BH1) in the ∼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 ± 0.4 M⊙), which is starting to fill its Roche lobe and is becoming distorted. Using 17 epochs of Ver...
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| Main Authors: | , , , , , , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
2022
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| In: |
Monthly notices of the Royal Astronomical Society
Year: 2022, Volume: 511, Issue: 2, Pages: 2914-2924 |
| ISSN: | 1365-2966 |
| DOI: | 10.1093/mnras/stab3159 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1093/mnras/stab3159
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| Author Notes: | S. Saracino, S. Kamann, M.G. Guarcello, C. Usher, N. Bastian, I. Cabrera-Ziri, M. Gieles, S. Dreizler, G.S. Da Costa, T.-O. Husser, V. Hénault-Brunet |
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| 520 | |a We report on the detection of a black hole (NGC 1850 BH1) in the ∼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 ± 0.4 M⊙), which is starting to fill its Roche lobe and is becoming distorted. Using 17 epochs of Very Large Telescope/Multi-Unit Spectroscopic Explorer observations, we detected radial velocity variations exceeding 300 km s−1 associated with the target star, linked to the ellipsoidal variations measured by the fourth phase of the Optical Gravitational Lensing Experiment in the optical bands. Under the assumption of a semidetached system, the simultaneous modelling of radial velocity and light curves constrains the orbital inclination of the binary to 38° ± 2°, resulting in a true mass of the unseen companion of $11.1_{-2.4}^{+2.1}\,{\rm M}_{\odot }$. 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. | ||
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| 700 | 1 | |a Guarcello, Mario Giuseppe |e VerfasserIn |4 aut | |
| 700 | 1 | |a Usher, Christopher |e VerfasserIn |4 aut | |
| 700 | 1 | |a Bastian, Nate |e VerfasserIn |4 aut | |
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| 700 | 1 | |a Husser, Tim-Oliver |e VerfasserIn |4 aut | |
| 700 | 1 | |a Hénault-Brunet, Vincent |e VerfasserIn |4 aut | |
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