Query : 2003A&A...402..879O

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.


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

goto Full paper

goto View the references in ADS

Number of rows : 4
N Identifier Otype ICRS (J2000)
ICRS (J2000)
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
1 M 99 H2G 12 18 49.625 +14 24 59.36 10.45 10.44 9.87     ~ 873 2
2 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6418 0
3 NGC 4438 LIN 12 27 45.6705493536 +13 00 31.708096380 11.37 11.02 10.17     ~ 618 2
4 NGC 4522 GiG 12 33 39.657 +09 10 29.54   13.6       ~ 355 0

To bookmark this query, right click on this link: simbad:objects in 2003A&A...402..879O and select 'bookmark this link' or equivalent in the popup menu


© Université de Strasbourg/CNRS

    • Contact