2004A&A...414..445M


Query : 2004A&A...414..445M

2004A&A...414..445M - Astronomy and Astrophysics, volume 414, 445-451 (2004/2-1)

The origin of HI-deficiency in galaxies on the outskirts of the Virgo cluster. I. How far can galaxies bounce out of clusters?

MAMON G.A., SANCHIS T., SALVADOR-SOLE E. and SOLANES J.M.

Abstract (from CDS):

Spiral galaxies that are deficient in neutral hydrogen are observed on the outskirts of the Virgo cluster. If their orbits have crossed the inner parts of the cluster, their interstellar gas may have been lost through ram pressure stripping by the hot X-ray emitting gas of the cluster. We estimate the maximum radius out to which galaxies can bounce out of a virialized system using analytical arguments and cosmological N-body simulations. In particular, we derive an expression for the turnaround radius in a flat cosmology with a cosmological constant that is simpler than previously derived expressions. We find that the maximum radius reached by infalling galaxies as they bounce out of their cluster is roughly between 1 and 2.5 virial radii. Comparing to the virial radius of the Virgo cluster, which we estimate from X-ray observations, these HI-deficient galaxies appear to lie significantly further away from the cluster center. Therefore, if their distances to the cluster core are correct, the HI-deficient spiral galaxies found outside of the Virgo cluster cannot have lost their gas by ram pressure from the hot intracluster gas.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - methods: analytical - methods: N-body simulations

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 - 2023
#notes
1 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 1054 1
2 NAME Virgo Cluster ClG 12 26 32.1 +12 43 24           ~ 6383 0
3 M 49 Sy2 12 29 46.798 +08 00 01.48   13.21 12.17     ~ 2042 2
4 M 87 AGN 12 30 49.42338414 +12 23 28.0436859 10.16 9.59 8.63   7.49 ~ 6831 3
5 M 89 LIN 12 35 39.80733343 +12 33 22.8308657 11.29 10.73 9.75     ~ 968 2
6 M 59 GiG 12 42 02.2581375168 +11 38 48.909507756   11.0       ~ 678 0
7 M 60 GiP 12 43 39.9708251928 +11 33 09.688174056   10.3       ~ 1313 1
8 NAME Local Group GrG ~ ~           ~ 7900 0

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2023.02.02-19:38:22

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