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Intermediate mass black holes (IMBHs) are among the most elusive objects in contemporary astrophysics. Both theoretical and observational evidence of their existence is subject of debate. Conversely, both theory and observations confirm the…

Astrophysics of Galaxies · Physics 2015-06-11 Alberto Sesana , Nicola Sartore , Bernadetta Devecchi , Andrea Possenti

Theoretical models predict that intermediate-mass black holes (IMBHs) exist in globular clusters (GCs), but observational evidence remains elusive. Millisecond pulsars (MSPs), which are abundant in GCs and have served as precise probes for…

High Energy Astrophysical Phenomena · Physics 2025-07-15 Xian Chen , Verónica Vázquez-Aceves , Siyuan Chen , Kejia Lee , Yanjun Guo , Kuo Liu

The discovery of a binary comprising a black hole (BH) and a millisecond pulsar (MSP) would yield insights into stellar evolution and facilitate exquisitely sensitive tests of general relativity. Globular clusters (GCs) are known to harbor…

High Energy Astrophysical Phenomena · Physics 2015-06-19 Drew Clausen , Steinn Sigurdsson , David F. Chernoff

Over a hundred millisecond radio pulsars (MSPs) have been observed in globular clusters (GCs), motivating theoretical studies of the formation and evolution of these sources through stellar evolution coupled to stellar dynamics. Here we…

High Energy Astrophysical Phenomena · Physics 2019-06-12 Claire S. Ye , Kyle Kremer , Sourav Chatterjee , Carl L. Rodriguez , Frederic A. Rasio

A significant fraction of millisecond pulsars (MSPs) in globular clusters (GCs) are observed as isolated objects, despite the widely accepted scenario in which MSPs are formed through recycling in compact binary systems. The origin of these…

High Energy Astrophysical Phenomena · Physics 2026-02-25 Raniere de Menezes

There is both theoretical expectation and some observational clues that intermediate mass black holes reside in nuclei of globular clusters. In order to find an independent indicator for their existence, we investigate in this paper how an…

Astrophysics of Galaxies · Physics 2019-01-18 L. Subr , G. Fragione , J. Dabringhausen

Millisecond pulsars (MSPs) are neutron stars with spin periods as short as a few milliseconds, formed through mass accretion from companion stars. In the dense environments of globular clusters (GCs), MSPs are likely to originate through…

High Energy Astrophysical Phenomena · Physics 2025-11-13 Yuzhe Song , Debatri Chattopadhyay , Jarrod Hurley , Rainer Spurzem , Francesco Flammini Dotti , Kai Wu

Binaries harboring a millisecond pulsar (MSP) and a black hole (BH) are a key observing target for current and upcoming pulsar surveys. We model the formation and evolution of such binaries in isolation at solar metallicity using the…

When embedded in dense cluster cores, intermediate mass black holes (IMBHs) acquire close stellar or stellar-remnant companions. These companions are not only gravitationally bound, they tend to hierarchically isolate from other cluster…

High Energy Astrophysical Phenomena · Physics 2016-03-16 Morgan MacLeod , Michele Trenti , Enrico Ramirez-Ruiz

We propose a new formation channel for intermediate mass black hole (IMBH) binaries via globular cluster collisions in the Galactic disc. Using numerical simulations, we show that the IMBHs form a tight binary that enters the gravitational…

Astrophysics of Galaxies · Physics 2019-06-17 Manuel Arca Sedda , Alessandra Mastrobuono-Battisti

Globular clusters may host intermediate mass black holes (IMBHs) at their centres. Here we propose a new method for their identification using millisecond pulsars (MSPs) as probes. We show that measuring the first (jerk) and second (jounce)…

High Energy Astrophysical Phenomena · Physics 2019-05-22 Federico Abbate , Mario Spera , Monica Colpi

Globular clusters (GCs) are evolved stellar systems containing entire populations of millisecond pulsars (MSPs), which are efficient gamma-ray emitters. Observations of this emission can be used as a powerful tool to explore the dynamical…

High Energy Astrophysical Phenomena · Physics 2019-04-10 Raniere de Menezes , Fabio Cafardo , Rodrigo Nemmen

Observations suggest that star clusters often form in binaries or larger bound groups. Therefore, mergers between two clusters are likely to occur. If these clusters both harbor an intermediate-mass black hole (IMBH; 10^{2-4} Msun) in their…

Astrophysics · Physics 2009-11-11 Pau Amaro-Seoane , Marc Freitag

The dynamical formation of black hole binaries in globular clusters that merge due to gravitational waves occurs more frequently in higher stellar density. Meanwhile, the probability to form intermediate mass black holes (IMBHs) also…

High Energy Astrophysical Phenomena · Physics 2020-09-09 Jongsuk Hong , Abbas Askar , Mirek Giersz , Arkadiusz Hypki , Suk-Jin Yoon

Millisecond pulsars (MSPs) are mainly characterised by their spin periods, B-fields and masses - quantities which are largely affected by previous interactions with a companion star in a binary system. In this paper, we investigate the…

Solar and Stellar Astrophysics · Physics 2012-08-30 Thomas M. Tauris , Norbert Langer , Michael Kramer

In this review I discuss the characteristics and the formation of all classes of millisecond pulsars (MSPs). The main focus is on the stellar astrophysics of X-ray binaries leading to the production of fully recycled MSPs with white dwarf…

High Energy Astrophysical Phenomena · Physics 2015-03-19 Thomas M. Tauris

Millisecond pulsars (MSPs) are believed to be old neutron stars, formed via Type Ib/c core-collapse supernovae, which have subsequently been spun up to high rotation rates via accretion from a companion star in a highly circularised…

Solar and Stellar Astrophysics · Physics 2015-06-17 Paulo C. C. Freire , Thomas M. Tauris

Millisecond pulsars (MSPs) are short-period pulsars that are distinguished from "normal" pulsars, not only by their short period, but also by their very small spin-down rates and high probability of being in a binary system. These…

High Energy Astrophysical Phenomena · Physics 2017-10-04 R. N. Manchester

The possible existence of intermediate mass binary black holes (IMBBHs) in globular clusters (GCs) offers a unique geometry in which to detect space-time oscillations. For certain pulsar-IMBBH configurations possible within a GC, the usual…

Astrophysics · Physics 2009-11-11 Fredrick A. Jenet , Teviet Creighton , Andrea Lommen

Evidence has been mounting for the existence of black holes with masses from 10^2 to 10^4 M_Solar associated with stellar clusters. Such intermediate-mass black holes (IMBHs) will encounter other black holes in the dense cores of these…

Astrophysics · Physics 2009-11-07 Kayhan Gultekin , M. Coleman Miller , Douglas P. Hamilton
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