Survival of cold gas clouds in the Circumgalactic Medium of Milky Way-like galaxies

Fortuin, Thomas (2020) Survival of cold gas clouds in the Circumgalactic Medium of Milky Way-like galaxies. Bachelor's Thesis, Astronomy.

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Abstract

A long standing question in the evolution of galaxies is how a spiral galaxy, like our Milky Way, obtains cold gas to sustain its star formation. In the last decades, observational evidence have shown that low-redshift galaxies are surrounded by a diffusive, multi-phase gas, the so-called cir- cumgalactic medium (CGM), that extents to large galactocentric distances and that it is likely to play a very important role in the galaxy accretion of cold gas, since it defines the transition between the central disc and the intergalactic medium (IGM). Gas clouds accreted from the IGM travel through the CGM before they fall onto the galactic disc and the efficieny of this accretion mode strongly depends on the survival of the clouds. In this work we investigate whether they can survive their infall throughout the galaxy halos and accrete onto the central galaxies. We investigated the survival at different locations of the galactic halos and varying the initial mass of the cloud. We have, in particular, explored the influence of thermal conduction on the survival of the clouds. We have found that in all our simulations, a very small part of the cold clouds evaporates into the ambient hot medium and they are therefore very likely to survive their journey through the CGM.

Item Type:	Thesis (Bachelor's Thesis)
Supervisor name:	Fraternali, F. and Afruni, A.
Degree programme:	Astronomy
Thesis type:	Bachelor's Thesis
Language:	English
Date Deposited:	13 Apr 2021 11:13
Last Modified:	13 Apr 2021 11:13
URI:	https://fse.studenttheses.ub.rug.nl/id/eprint/24245

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