Intermediate-Mass Black Holes in Extragalactic Globular Clusters
| Autor: | Wrobel, Joan M., Haiman, Zoltan, Holley-Bockelmann, Kelly, Inayoshi, Kohei, Lazio, Joe, Maccarone, Tom, Miller-Jones, James, Nyland, Kristina, Plotkin, Rich |
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| Rok vydání: | 2019 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Astrophysics::High Energy Astrophysical Phenomena Astrophysics of Galaxies (astro-ph.GA) Astrophysics::Solar and Stellar Astrophysics FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics - High Energy Astrophysical Phenomena Astrophysics - Astrophysics of Galaxies Astrophysics::Galaxy Astrophysics |
| DOI: | 10.48550/arxiv.1903.04902 |
| Popis: | Intermediate-mass black holes (IMBHs) have masses of about 100 to 100,000 solar masses. They remain elusive. Observing IMBHs in present-day globular clusters (GCs) would validate a formation channel for seed black holes in the early universe and inform event predictions for gravitational wave facilities. Reaching a large number of GCs per galaxy is key, as models predict that only a few percent will have retained their gravitational-wave fostering IMBHs. Related, many galaxies will need to be examined to establish a robust sample of IMBHs in GCs. These needs can be meet by using a next-generation Very Large Array (ngVLA) to search for IMBHs in the GCs of hundreds of galaxies out to a distance of 25 Mpc. These galaxies hold tens of thousands of GCs in total. We describe how to convert an ngVLA signal from a GC to an IMBH mass according to a semi-empirical accretion model. Simulations of gas flows in GCs would help to improve the robustness of the conversion. Also, self-consistent dynamical models of GCs, with stellar and binary evolution in the presence of IMBHs, would help to improve IMBH retention predictions for present-day GCs. Comment: 7 pages; 2 figures; an Astro2020 Science White Paper. arXiv admin note: substantial text overlap with arXiv:1806.06052 |
| Databáze: | OpenAIRE |
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