2005A&A...437L..19O


C.D.S. - SIMBAD4 rel 1.7 - 2019.11.21CET05:48:24

2005A&A...437L..19O - Astronomy and Astrophysics, volume 437, L19-22 (2005/7-1)

A large HI cloud near the centre of the Virgo cluster.

OOSTERLOO T. and VAN GORKOM J.

Abstract (from CDS):

We report the discovery of a large HI cloud in the central regions of the Virgo cluster. It is 110x25kpc in size and contains 3.4x108M of HI. The morphology and kinematics of this cloud strongly suggest that it consists of HI removed from the galaxy NGC 4388 by ram-pressure stripping. It is more likely the result of an interaction of the ISM of NGC 4388 with the hot halo of the M86 group and not with the ICM centred on M87. The large extent of the plume suggests that gas stripped from cluster galaxies can remain neutral for at least 108yr. Locally, the column density is well above 1020cm–2, suggesting that the intra-cluster HII regions known to exist in Virgo may have formed from gas stripped from cluster galaxies. The existence of the HI plume suggests that stripping of infalling spirals contributes to the enrichment of the ICM. The HI object in the Virgo cluster recently reported by Minchin et al. (2005ApJ...622L..21M) may have a similar origin and may therefore not be a ``dark galaxy''.

Abstract Copyright:

Journal keyword(s): intergalactic medium - galaxies: interaction - galaxies: clusters: individual: Virgo cluster - galaxies: individual: NGC 4388

Simbad objects: 10

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Number of rows : 10

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 ACO 1367 ClG 11 44 44.6 +19 41 59           ~ 975 1
2 M 99 H2G 12 18 49.625 +14 24 59.36 10.45 10.44 9.87     ~ 740 2
3 NGC 4387 GiG 12 25 41.6768872639 +12 48 37.809497625 13.42 13.01 12.12   10.87 ~ 365 1
4 NGC 4388 Sy2 12 25 46.820 +12 39 43.45 11.91 11.76 11.02     ~ 1155 2
5 M 86 GiG 12 26 11.814 +12 56 45.49 10.32 9.83 8.90   7.50 ~ 997 1
6 NAME Vir I ClG 12 26 32.1 +12 43 24   10.00 8.49     ~ 5662 0
7 NGC 4413 GiP 12 26 32.2322973950 +12 36 38.412408309   13.6 12.25     ~ 204 1
8 M 87 BiC 12 30 49.42338230 +12 23 28.0438581 10.16 9.59 8.63   7.49 ~ 6038 3
9 ACO 3526 ClG 12 48 51.8 -41 18 21           ~ 958 2
10 NGC 4709 GiG 12 50 03.948 -41 22 55.46   12.48 11.32 10.89   ~ 115 0

    Equat.    Gal    SGal    Ecl

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2019.11.21-05:48:24

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