SIMBAD references

2015A&A...582A...6V - Astronomy and Astrophysics, volume 582A, 6-6 (2015/10-1)

Ram pressure stripping in the Virgo Cluster.


Abstract (from CDS):

Gas can be violently stripped from their galaxy disks in rich clusters, and be dispersed over 100 kpc-scale tails or plumes. Young stars have been observed in these tails, suggesting they are formed in situ. This will contribute to the intracluster light, in addition to tidal stripping of old stars. We want to quantify the efficiency of intracluster star formation. We present CO(1-0) and CO(2-1) observations, made with the IRAM-30 m telescope, towards the ram-pressure stripped tail northeast of NGC 4388 in Virgo. We selected HII regions found all along the tails, together with dust patches, as observing targets. We detect molecular gas in 4 positions along the tail, with masses between 7x105 to 2x106M. Given the large distance from the NGC 4388 galaxy, the molecular clouds must have formed in situ, from the HI gas plume. We compute the relation between surface densities of star formation and molecular gas in these regions, and find that the star formation has very low efficiency. The corresponding depletion time of the molecular gas can be up to 500Gyr and more. Since this value exceeds a by far Hubble time, this gas will not be converted into stars, and will stay in a gaseous phase to join the intracluster medium.

Abstract Copyright:

Journal keyword(s): galaxies: evolution - galaxies: clusters: individual: Virgo - galaxies: clusters: intracluster medium - galaxies: ISM - galaxies: interactions

CDS comments: Fig.4 sources 001-A, 001-B and 001-C from Jachym et al. 2014 not in SIMBAD.

Simbad objects: 13

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