2009ApJ...694..789T


Query : 2009ApJ...694..789T

2009ApJ...694..789T - Astrophys. J., 694, 789-804 (2009/April-1)

Gas stripping in simulated galaxies with a multiphase interstellar medium.

TONNESEN S. and BRYAN G.L.

Abstract (from CDS):

Cluster galaxies moving through the intracluster medium (ICM) are expected to lose some of their interstellar medium (ISM) through ISM-ICM interactions. We perform high-resolution (40 pc) three-dimensional hydrodynamical simulations of a galaxy undergoing ram pressure stripping, including radiative cooling, in order to investigate stripping of a multiphase medium. The clumpy, multiphase ISM is self-consistently produced by the inclusion of radiative cooling, and spans six orders of magnitude in gas density. We find no large variations in the amount of gas lost whether or not cooling is involved, although the gas in the multiphase galaxy is stripped more quickly and to a smaller radius. We also see significant differences in the morphology of the stripped disks. This occurs because the multiphase medium naturally includes high-density clouds set inside regions of lower density. We find that the lower density gas is stripped quickly from any radius of the galaxy, and the higher density gas can then be ablated. If high-density clouds survive, through interaction with the ICM, they lose enough angular momentum to drift toward the center of the galaxy where they are no longer stripped. Finally, we find that low ram pressure values compress gas into high-density clouds that could lead to enhanced star formation, while high ram pressure leads to a smaller amount of high-density gas.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: general - galaxies: interactions - methods: N-body simulations

Simbad objects: 7

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Number of rows : 7
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2024
#notes
1 NGC 4402 GiP 12 26 07.65312 +13 06 47.9376   12.55       ~ 403 2
2 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6645 0
3 NGC 4438 LIN 12 27 45.6705493536 +13 00 31.708096380 11.37 11.02 10.17     ~ 637 2
4 NGC 4485 GiP 12 30 31.113 +41 42 04.22 12.10 12.42 11.93 11.93   ~ 284 2
5 NGC 4490 GiP 12 30 34.5 +41 38 26 10.03 10.22 9.79     ~ 574 3
6 NGC 4522 GiG 12 33 39.657 +09 10 29.54   13.6       ~ 373 0
7 NGC 4848 AGN 12 58 05.5778304792 +28 14 33.253619100   14.2   13.53   ~ 199 0

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