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There have been increasing theoretical speculations and observational indications that certain globular clusters (GCs) could contain a sizeable population of stellar mass black holes (BHs). In this paper, we shortlist at least 29 Galactic…

星系天体物理 · 物理学 2018-05-16 Abbas Askar , Manuel Arca Sedda , Mirek Giersz

In this paper we explore the interplay between intermediate-mass black holes (IMBHs) and their nursing globular clusters (GCs), taking advantage of over 2000 Monte Carlo GC models. We find that the average density of IMBHs sphere of…

星系天体物理 · 物理学 2019-05-06 Manuel Arca Sedda , Abbas Askar , Mirek Giersz

Machine learning is a powerful technique, becoming increasingly popular in astrophysics. In this paper, we apply machine learning to more than a thousand globular cluster (GC) models simulated as part of the 'MOCCA-Survey Database I'…

星系天体物理 · 物理学 2019-03-13 Ammar Askar , Abbas Askar , Mario Pasquato , Mirek Giersz

Populations of stellar-mass black holes (BHs) in globular clusters (GCs) influence their dynamical evolution and have important implications on one of the main formation channels for gravitational wave sources. Inferring the size of these…

星系天体物理 · 物理学 2024-02-14 Nolan Dickson , Peter J. Smith , Vincent Hénault-Brunet , Mark Gieles , Holger Baumgardt

In this work, we investigate the black hole (BH) population of globular clusters (GCs) in Milky Way- (MW) and Andromeda- (M31) like galaxies. We combine the population synthesis code MASinGa and the MOCCA-Survey Database I to infer the…

星系天体物理 · 物理学 2023-02-01 A. Leveque , M. Giersz , A. Askar , M. Arca-Sedda , A. Olejak

Sizeable number of stellar-mass black holes (BHs) in globular clusters (GCs) can strongly influence the dynamical evolution and observational properties of their host cluster. Using results from a large set of numerical simulations, we…

星系天体物理 · 物理学 2020-03-18 Abbas Askar , Mirek Giersz , Manuel Arca Sedda , Ammar Askar , Mario Pasquato , Agostino Leveque

Recent numerical simulations of globular clusters (GCs) have shown that stellar-mass black holes (BHs) play a fundamental role in driving cluster evolution and shaping their present-day structure. Rapidly mass-segregating to the center of…

太阳与恒星天体物理 · 物理学 2020-08-12 Newlin C. Weatherford , Sourav Chatterjee , Kyle Kremer , Frederic A. Rasio

In this first of a series of papers, we utilize results for around two thousand star cluster models simulated using the MOCCA code for star cluster evolution (Survey Database I) to determine the astrophysical properties and local merger…

高能天体物理现象 · 物理学 2016-10-10 Abbas Askar , Magdalena Szkudlarek , Dorota Gondek-Rosińska , Mirek Giersz , Tomasz Bulik

Recent discoveries of black hole (BH) candidates in Galactic and extragalactic globular clusters (GCs) have ignited interest in understanding how BHs dynamically evolve in a GC and the number of BHs ($N_{\rm{BH}}$) that may still be…

太阳与恒星天体物理 · 物理学 2018-09-05 Newlin C. Weatherford , Sourav Chatterjee , Carl L. Rodriguez , Frederic A. Rasio

Globular clusters have been alternatively predicted to host intermediate-mass black holes (IMBHs) or nearly impossible to form and retain them in their centres. Over the last decade enough theoretical and observational evidence have…

星系天体物理 · 物理学 2014-11-20 M. Safonova , C. S. Stalin

Black holes (BHs) play a major role in the structural and dynamical evolutions of Globular Clusters (GCs). Several recent works searched for BHs in Galactic GCs using scaling relations derived from numerical simulations. However, the…

星系天体物理 · 物理学 2025-10-20 Alessandro Della Croce

The dynamical formation of binary black holes (BBHs) in globular clusters (GCs) may contribute significantly to the observed gravitational wave (GW) merger rate. Furthermore, LISA may detect many BBH sources from GCs at mHz frequencies,…

高能天体物理现象 · 物理学 2025-05-13 Zeyuan Xuan , Kyle Kremer , Smadar Naoz

Globular clusters have been alternatively predicted to host intermediate-mass black holes (IMBHs) or nearly impossible to form and retain them in their centres. Over the last decade enough theoretical and observational evidence have…

天体物理学 · 物理学 2015-06-24 Margarita Safonova , C. S. Stalin

Globular clusters (GCs) are thought to harbor the long-sought population of intermediate-mass black holes (IMBHs). We present a systematic search for a putative IMBH in 81 Milky Way GCs, based on archival Chandra X-ray observations. We find…

高能天体物理现象 · 物理学 2022-08-31 Zhao Su , Zhiyuan Li , Meicun Hou , Mengfei Zhang , Zhongqun Cheng

Here we investigate the possibility that some globular clusters (GCs) harbor intermediate mass black holes (BH) in their centers and are also embedded in a low-mass dark matter (DM) halo. Up to date, there is no evidence on whether or not…

高能天体物理现象 · 物理学 2020-08-19 Elaine C. F. S. Fortes , Oswaldo D. Miranda , Floyd W. Stecker , Carlos A. Wuensche

Recent observations suggest the presence of supermassive black holes at the centers of many galaxies. The existence of intermediate-mass black holes (IMBHs) in globular clusters has also been predicted. We focus on gravitational lensing as…

星系天体物理 · 物理学 2021-01-01 Takayuki Tatekawa , Yuuki Okamura

Many observed globular clusters (GCs) seem to show a central overabundance of mass whose nature has not yet fully understood. Indeed, it is not clear whether it is due to a central intermediate mass black hole (IMBH) or to a massive stellar…

星系天体物理 · 物理学 2016-06-23 Manuel Arca-Sedda

Decades after the first predictions of intermediate-mass black holes (IMBHs) in globular clusters (GCs) there is still no unambiguous observational evidence for their existence. The most promising signatures for IMBHs are found in the cores…

星系天体物理 · 物理学 2015-06-05 Stefan Umbreit , Frederic A. Rasio

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…

It has been assumed that intermediate-mass black holes (IMBHs) in globular clusters can only reside in the most centrally concentrated clusters, with a so-called `core-collapsed' density profile. While this would be a natural guess, it is…

天体物理学 · 物理学 2009-11-10 Holger Baumgardt , Junichiro Makino , Piet Hut
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