SIMBAD references

2010ApJ...725.2333K - Astrophys. J., 725, 2333-2343 (2010/December-3)

Clouds toward the Virgo cluster periphery: gas-rich optically inert galaxies.


Abstract (from CDS):

Aperture synthesis observations of two H I cloud complexes located in the periphery of the Virgo galaxy cluster are presented. These low H I-mass clouds (M_ H I_< 109 M) are seen projected on the M region of the western Virgo cluster, where the galaxy population is thought to lie behind the main A cluster surrounding M87. The kinematic measurements of both unresolved Arecibo and resolved Very Large Array (VLA)-C observations are in good agreement. The H I detections cannot be identified with any optical, IR, or UV emission from available archival imaging. They are inert at these wavelengths. The H I masses of the individual VLA detections range from 7.28 ≤ log(M_ H I/M☉_) ≤ 7.85. The total dynamical mass estimates are several times their H I content, ranging from 7.00 ≤ log(Mdyn/M) ≤ 9.07, with the assumption that the clouds are self-gravitating and in dynamical equilibrium. We report the observed parameters derived from the VLA observations. One of these H I clouds appears to be the most isolated optically inert detection observed in the outer reaches of Virgo.

Abstract Copyright:

Journal keyword(s): galaxies: clusters: individual: Virgo - galaxies: clusters: intracluster medium - galaxies: halos - intergalactic medium - radio lines: galaxies

Nomenclature: Figs 4-5, Table 4: [K2010] Cloud N North (Nos 1-2), [K2010] Cloud N South (Nos 1-2), [K2010] Cloud 2 West N=1.

Simbad objects: 79

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