Dynamical friction in globular cluster-rich ultra-diffuse galaxies: the case of NGC5846-UDG1

Bar, Nitsan; Danieli, Shany; Blum, Kfir

doi:10.48550/arxiv.2202.10179

Cited by 2 publications

(2 citation statements)

References 36 publications

(92 reference statements)

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“…LMC, SMC, Sgr), which pass through the halo, to spiral inwards due to dynamical friction. For some dwarf galaxies the time scale of dynamical friction is less than 10 Gyr, meaning that it is an important factor to consider over the lifetime of the galaxy (Bar et al 2022). The galactocentric distance of such massive dwarfs were larger at ∼ 13 Gyrs ago.…”

Section: Initial Conditions Of Dsphs Of the Mwmentioning

confidence: 99%

The Escape of Globular Clusters from the Satellite Dwarf Galaxies of the Milky Way

Shirazi,

Haghi,

Khalaj

et al. 2022

Preprint

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Using numerical simulations, we have studied the escape of globular clusters (GCs) from the satellite dwarf spheroidal galaxies (dSphs) of the Milky Way (MW). We start by following the orbits of a large sample of GCs around dSphs in the presence of the MW potential field. We then obtain the fraction of GCs leaving their host dSphs within a Hubble Time. We model dSphs by a Hernquist density profile with masses between 10 7 M and 7 × 10 9 M . All dSphs lie on the Galactic disc plane, but they have different orbital eccentricities and apogalactic distances. We compute the escape fraction of GCs from 13 of the most massive dSphs of the MW, using their realistic orbits around the MW (as determined by Gaia). The escape fraction of GCs from 13 dSphs is in the range 12% to 93%. The average escape time of GCs from these dSphs was less than 8 Gyrs, indicating that the escape process of GCs from dSphs was over. We then adopt a set of observationally-constrained density profiles for specific case of the Fornax dSph. According to our results, the escape fraction of GCs shows a negative correlation with both the mass and the apogalactic distance of the dSphs, as well as a positive correlation with the orbital eccentricity of dSphs. In particular, we find that the escape fraction of GCs from the Fornax dSph is between 13% and 38%. Finally, we observe that when GCs leave their host dSphs, their final orbit around the MW does not differ much from their host dSphs.

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Section: Initial Conditions Of Dsphs Of the Mwmentioning

confidence: 99%

The Escape of Globular Clusters from the Satellite Dwarf Galaxies of the Milky Way

Shirazi,

Haghi,

Khalaj

et al. 2022

Preprint

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“…Studying the properties of the globular clusters of UDGs can also be a useful tool to test models that make direct predictions on some of their properties such as their number, spatial distribution, sizes, and luminosities (e.g. Trujillo-Gomez et al 2022;Bar et al 2022;Danieli et al 2022).…”

Section: Udgsmentioning

confidence: 99%

Dark matter and angular momentum in nearby disc galaxies

Piña¹

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Dynamical friction in globular cluster-rich ultra-diffuse galaxies: the case of NGC5846-UDG1

Cited by 2 publications

References 36 publications

The Escape of Globular Clusters from the Satellite Dwarf Galaxies of the Milky Way

The Escape of Globular Clusters from the Satellite Dwarf Galaxies of the Milky Way

Dark matter and angular momentum in nearby disc galaxies

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