2003A&A...402..879O


C.D.S. - SIMBAD4 rel 1.7 - 2020.07.05CEST07:29:12

2003A&A...402..879O - Astronomy and Astrophysics, volume 402, 879-889 (2003/5-2)

Magnetic field evolution in galaxies interacting with the intracluster medium 3D numerical simulations.

OTMIANOWSKA-MAZUR K. and VOLLMER B.

Abstract (from CDS):

A fully three-dimensional (3D) magnetohydrodynamical (MHD) model is applied to simulate the evolution of the large-scale magnetic field in cluster galaxies interacting with the intra-cluster medium (ICM). As the model input we use time-dependent gas velocity fields resulting from 3D N-body sticky-particle simulations of a galaxy. The modeled clouds are affected by the ram pressure due to their rapid motion through the ICM in the central part of a cluster. Numerical simulations have shown that after the initial compression phase due to ram pressure, a process of gas re-accretion onto the galactic disk takes place. We find that the gas re-accretion leads to an increase of the total magnetic energy without any dynamo action. The simulated magnetic fields are used to construct the model maps of high-frequency (Faraday rotation-free) polarized radio emission. We show that the evolution of the polarized intensity shows features that are characteristic of different evolutionary stages of an ICM-ISM interaction. The comparison of polarized radio continuum emission maps with our model permits us to determine whether the galaxy is in the compression or in the re-accretion phase. It also provides an important constraint upon the dynamical modeling of ICM-ISM interactions.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: ISM - galaxies: magnetic fields - galaxies: clusters: general - galaxies: intergalactic medium - methods: numerical

Simbad objects: 4

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Number of rows : 4

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2020
#notes
1 M 99 H2G 12 18 49.625 +14 24 59.36 10.45 10.44 9.87     ~ 762 2
2 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5824 0
3 NGC 4438 LIN 12 27 45.652 +13 00 30.92 11.37 11.02 10.17     ~ 578 3
4 NGC 4522 GiG 12 33 39.657 +09 10 29.54   13.6       ~ 327 0

    Equat.    Gal    SGal    Ecl

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2020.07.05-07:29:12

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