SIMBAD references

2005ApJ...622L..21M - Astrophys. J., 622, L21-L24 (2005/March-3)

A dark hydrogen cloud in the Virgo cluster.

MINCHIN R., DAVIES J., DISNEY M., BOYCE P., GARCIA D., JORDAN C., KILBORN V., LANG R., ROBERTS S., SABATINI S. and VAN DRIEL W.

Abstract (from CDS):

VIRGOHI 21 is an H I source detected in the Virgo Cluster survey of Davies et al. that has a neutral hydrogen mass of 108 Mand a velocity width of ΔV20=220 km/s. From the Tully-Fisher relation, a galaxy with this velocity width would be expected to be 12 mag or brighter; however, deep CCD imaging has failed to turn up a counterpart down to a surface brightness level of 27.5 B mag/arcsec2. The H I observations show that it is extended over at least 16 kpc, which, if the system is bound, gives it a minimum dynamical mass of ∼1011 Mand a mass-to-light ratio of Mdyn/LB>500 M/L. If it is tidal debris, then the putative parents have vanished; the remaining viable explanation is that VIRGOHI 21 is a dark halo that does not contain the expected bright galaxy. This object was found because of the low column density limit of our survey, a limit much lower than that achieved by all sky H I surveys such as those carried out at Parkes and Jodrell Bank. Further such sensitive surveys might turn up a significant number of the dark matter halos predicted by galaxy formation models.

Abstract Copyright:

Journal keyword(s): Cosmology: Dark Matter - Galaxies: Clusters: Individual: Name: Virgo - Galaxies: General - Radio Lines: Galaxies

Nomenclature: Fig.3: [MDD2005] A (Nos A-E).

CDS comments: Fig.3: [MDD2005] A to [MDD2005] E are not in SIMBAD, but [MDD2005] C = MAPS-NGP O-435-1291894, [MDD2005] D = MAPS-NGP O-435-1292289, [MDD2005] E = VCC 273.

Simbad objects: 12

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2005ApJ...622L..21M and select 'bookmark this link' or equivalent in the popup menu


2021.02.26-20:20:42

© Université de Strasbourg/CNRS

    • Contact