2008A&A...481..337K


C.D.S. - SIMBAD4 rel 1.7 - 2021.01.26CET00:19:12

2008A&A...481..337K - Astronomy and Astrophysics, volume 481, 337-343 (2008/4-2)

On the influence of ram-pressure stripping on the star formation of simulated spiral galaxies.

KRONBERGER T., KAPFERER W., FERRARI C., UNTERGUGGENBERGER S. and SCHINDLER S.

Abstract (from CDS):

We investigate the influence of ram-pressure stripping on the star formation and the mass distribution in simulated spiral galaxies. Special emphasis is put on the question of where the newly formed stars are located. The stripping radius from the simulation is compared to analytical estimates. Disc galaxies are modelled in combined N-body/hydrodynamic simulations (GADGET-2) with prescriptions for cooling, star formation, stellar feedback, and galactic winds. These model galaxies move through a constant density and temperature gas, which has parameters comparable to the intra-cluster medium (ICM) in the outskirts of a galaxy cluster (T=3keV≃3.6x107K and ρ=10–28g/cm3). With this numerical setup we analyse the influence of ram-pressure stripping on the star formation rate of the model galaxy. We find that the star formation rate is significantly enhanced by the ram-pressure effect (up to a factor of 3). Stars form in the compressed central region of the galaxy, as well as in the stripped gas behind the galaxy. Newly formed stars can be found up to hundred kpc behind the disc, forming structures with sizes of roughly 1kpc in diameter and with masses of up to 107M. As they do not possess a dark matter halo due to their formation history, we name them ``stripped baryonic dwarf'' galaxies. We also find that the analytical estimate for the stripping radius from a Gunn & Gott (1972ApJ...176....1G) criterion agrees well with the numerical value from the simulation. Like in former investigations, edge-on systems lose less gas than face-on systems, and the resulting spatial distribution of the gas and the newly formed stars is different.

Abstract Copyright:

Journal keyword(s): galaxies: interactions - galaxies: intergalactic medium - galaxies: stellar content - methods: numerical

Simbad objects: 8

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Number of rows : 8

N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2021
#notes
1 ACO 168 ClG 01 15 09.8 +00 14 51           ~ 327 2
2 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5952 0
3 ACO 3528 ClG 12 54 18.2 -29 01 16           ~ 150 1
4 ACO 1656 ClG 12 59 48.7 +27 58 50           ~ 4300 2
5 ACO 3562 ClG 13 33 31.8 -31 40 23           ~ 285 1
6 ACO 2125 ClG 15 41 14.1 +66 15 57           ~ 118 1
7 ACO 2255 ClG 17 12 50.04 +64 03 10.6           ~ 507 0
8 ACO 3921 ClG 22 49 38.6 -64 23 15           ~ 139 1

    Equat.    Gal    SGal    Ecl

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2021.01.26-00:19:12

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