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Globular clusters (GCs) are often used to estimate the dark matter content of galaxies, especially dwarfs, where other kinematic tracers are lacking. These estimates typically assume spherical symmetry and dynamical equilibrium, assumptions…

Astrophysics of Galaxies · Physics 2021-02-17 Jessica E. Doppel , Laura V. Sales , Julio F. Navarro , Mario G. Abadi , Eric W. Peng , Elisa Toloba

The existence of globular clusters (GCs) in a few satellite galaxies, and their absence in majority of dwarf galaxies, present a challenge for models attempting to understand the origins of GCs. In addition to GC presence appearing…

Astrophysics of Galaxies · Physics 2023-05-24 Yingtian Chen , Oleg Y. Gnedin

Cosmological simulations of galaxy clusters are unable to resolve dwarf galaxies due to limited numerical resolution which drives the artificial disruption of dark matter substructures. We address these limitations by combining the results…

Astrophysics of Galaxies · Physics 2026-04-28 Pradyumna Sadhu , Laura V. Sales , Julio F. Navarro , Raphaël Errani , Jose Benavides , Eric W. Peng

We study the assembly of globular clusters (GCs) in 9 galaxy clusters using the cosmological simulation Illustris. GCs are tagged to individual galaxies at their infall time. The tidal removal of GCs from their galaxies and the distribution…

Astrophysics of Galaxies · Physics 2020-03-04 Felipe Ramos-Almendares , Laura V. Sales , Mario G. Abadi , Jessica E. Doppel , Hernan Muriel , Eric W. Peng

We present a novel method combining existing cosmological simulations and orbital integration to study the hierarchical assembly of globular cluster (GC) populations in the Milky Way (MW). Our method models the growth and evolution of GC…

Astrophysics of Galaxies · Physics 2026-01-14 Pierre Boldrini , Paola Di Matteo , Chervin Laporte , Oscar Agertz , Sergey Khoperskov , Giulia Pagnini

The modern generation of wide-field galaxy surveys, such as LSST, Euclid and Roman, will enable studies of dwarf galaxies $(10^6 \leq M_\ast / M_\odot \leq 10^9)$ beyond the Local Group (LG) in unprecedented detail. Improved theoretical…

We use the cosmological hydrodynamical simulation TNG50 to study the galaxy mass-morphology relation, as measured by the rotational support of the stellar component of simulated galaxies. For isolated galaxies with stellar mass in the range…

Astrophysics of Galaxies · Physics 2025-06-25 Bruno M. Celiz , Julio F. Navarro , Mario G. Abadi , Volker Springel

The connection between a galaxy's total globular cluster system (GCS) mass and its halo mass has been studied for decades and it has been found that galaxies at nearly all observed masses adhere to a linear scaling relation between these…

Astrophysics of Galaxies · Physics 2025-12-10 Veronika Dornan , William E. Harris

Compact groups of dwarf galaxies (CGDs) have been observed at low redshifts ($z<0.1$) and are direct evidence of hierarchical assembly at low masses. To understand the formation of CGDs and the galaxy assembly in the low-mass regime, we…

Using a new method to estimate total galaxy mass (M$_{\rm T}$) and two samples of low luminosity galaxies containing measurements of the number of globular clusters (GCs) per galaxy (N$_{\rm GC}$), we revisit the N$_{\rm GC}-$M$_{\rm T}$…

Astrophysics of Galaxies · Physics 2022-04-27 Dennis Zaritsky

The fraction of stellar mass contained in globular clusters (GCs), also measured by number as the specific frequency, is a fundamental quantity that reflects both a galaxy's early star formation and its entire merging history. We present…

The velocity dispersion of globular clusters (GCs) around ultra-diffuse galaxies (UDGs) in the Virgo cluster spans a wide range, including cases where GC kinematics suggest halos as massive as (or even more massive than) that of the Milky…

High mass galaxies, with halo masses $M_{200} \ge 10^{10} M_{\odot}$, reveal a remarkable near-linear relation between their globular cluster (GC) system mass and their host galaxy halo mass. Extending this relation to the mass range of…

Astrophysics of Galaxies · Physics 2018-10-03 Duncan A. Forbes , Justin I. Read , Mark Gieles , Michelle L. M. Collins

We report the result of searching for globular clusters (GCs) around 55 Milky Way satellite dwarf galaxies within the distance of 450 kpc from the Galactic Center except for the Large and Small Magellanic Clouds and the Sagittarius dwarf.…

Astrophysics of Galaxies · Physics 2020-11-04 Kuan-Wei Huang , Sergey E. Koposov

We present an end-to-end description of the formation process of globular clusters (GCs) which combines a treatment for their formation and dynamical evolution within galaxy haloes with a state-of-the-art semi-analytic simulation of galaxy…

We use the Millennium II cosmological simulation combined with the semi-analytic galaxy formation model of Guo et al. (2011) to predict the contribution of galactic nuclei formed by the tidal stripping of nucleated dwarf galaxies to…

Astrophysics of Galaxies · Physics 2015-06-22 Joel Pfeffer , Brendan F. Griffen , Holger Baumgardt , Michael Hilker

The globular clusters of large spiral galaxies can be divided into two populations: one which formed in-situ and one which comprises clusters tidally stripped away from other galaxies. In this paper we investigate the contribution to the…

Astrophysics of Galaxies · Physics 2019-03-20 Eric P. Andersson , Melvyn B. Davies

The dwarf galaxies comparable to the LMC and SMC, with stellar masses $7.5 <{\rm log}(M_{\ast}/M_{\odot})<9.5$, are found in a diversity of environments and have long quenching timescales. We need to understand how this phenomenon is…

Astrophysics of Galaxies · Physics 2025-04-25 Joy Bhattacharyya , Annika H. G. Peter , Alexie Leauthaud

Globular clusters (GCs) are bright objects that span a wide range of galactocentric distances, and are thus probes of the structure of dark matter (DM) haloes. In this work, we explore whether the projected radial profiles of GCs can be…

We perform a thorough analysis of the projected shapes of nearby galaxies in both observations and cosmological simulations. We implement a forward-modeling approach to overcome the limitations in previous studies, which hinder accurate…

Astrophysics of Galaxies · Physics 2024-10-10 Dewang Xu , Hua Gao , Connor Bottrell , Hassen M. Yesuf , Jingjing Shi
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