A black hole detected in the young massive LMC cluster NGC 1850
| Autor: | Stefan Dreizler, Tim-Oliver Husser, Sebastian Kamann, M. G. Guarcello, Nate Bastian, G. S. Da Costa, Vincent Hénault-Brunet, Christopher Usher, Mark Gieles, I. Cabrera-Ziri, S. Saracino |
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| Přispěvatelé: | European Commission, Swedish Research Council, Ministerio de Ciencia e Innovación (España), Natural Sciences and Engineering Research Council of Canada |
| Rok vydání: | 2021 |
| Předmět: |
Initial mass function
Globular clusters: individual: NGC 1850 Astrophysics::High Energy Astrophysical Phenomena FOS: Physical sciences Astrophysics Binaries: spectroscopic Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences Orbital inclination spectroscopic [Binaries] 0103 physical sciences Astrophysics::Solar and Stellar Astrophysics individual: NGC 1850 [Globular clusters] Roche lobe Large Magellanic Cloud Techniques: imaging spectroscopy 010303 astronomy & astrophysics QC Astrophysics::Galaxy Astrophysics Solar and Stellar Astrophysics (astro-ph.SR) QB Physics radial velocities [Techniques] 010308 nuclear & particles physics imaging spectroscopy [Techniques] photometry [Galaxies] Astronomy and Astrophysics Galaxies: photometry Light curve Astrophysics - Astrophysics of Galaxies Black hole Radial velocity True mass Astrophysics - Solar and Stellar Astrophysics Space and Planetary Science Techniques: radial velocities Astrophysics of Galaxies (astro-ph.GA) Astrophysics::Earth and Planetary Astrophysics |
| Zdroj: | Digital.CSIC. Repositorio Institucional del CSIC instname |
| ISSN: | 0035-8711 |
| DOI: | 10.48550/arxiv.2111.06506 |
| Popis: | 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\M⊙. 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. SS, NB and ICZ acknowledge financial support from the European Research Council (ERC-CoG-646928, Multi-Pop). SK acknowledges funding from the UKRI in the form of a Future Leaders Fellowship (grant no. MR/T022868/1). CU acknowledges the support of the Swedish Research Council, Vetenskapsrådet. MG acknowledges support from the Ministry of Science and Innovation through a Europa Excelencia grant (EUR2020-112157). VHB acknowledges the support of the Natural Sciences and Engineering Research Council of Canada (NSERC) through grant RGPIN-2020-05990. |
| Databáze: | OpenAIRE |
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