Idealised simulations of ram-pressure stripping

by Dr Ritali Ghosh (Joint Astronomy & Astrophysics Program, IISc, Bangalore - 560012, India)

Monday 19 Sept 2022, 10:00 → 12:00 Europe/Rome

0/0-3 - Sala Rosino (Dipartimento di Fisica e Astronomia - Edificio ex-Rizzato)

Idealised simulations of ram-pressure stripping

 

Abstract:

     The gas content of galaxies is significantly influenced by their environment. Moving through its host cluster’s potential well, the cold interstellar medium (ISM) of a galaxy can be stripped due to ram pressure, thereby getting mixed with the intracluster medium (ICM). We carry out idealized 3D-hydrodynamical simulations to study the interaction of a galaxy’s interstellar medium (ISM) and its circumgalactic medium (CGM) with the hot ICM.

      Previous works have studied the role of ram-pressure of varying strengths in determining the survival of the ISM disc and shaping the morphology of stripped tails. We extend these works by identifying regimes of growth and destruction of cold clumps in the wakes of the stripped tails with radiative cooling. Our study makes a systematic comparison of the criterion for stripping with similar setups without gravity (standard cloud-crushing problem), to compare and isolate the role of key processes - ram-pressure that mixes cold gas and the hot ICM, the gravitational pull that tries to keep the cold gas bound to the galaxy, and radiative cooling that causes the growth of cold

gas

 

 

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