SIMBAD references

2020A&A...642L..10B - Astronomy and Astrophysics, volume 642, L10-10 (2020/10-1)

Deep optical imaging of the dark galaxy candidate AGESVC1 282.


Abstract (from CDS):

The blind HI survey Arecibo Galaxy Environment Survey (AGES) detected several unresolved sources in the Virgo cluster, which do not have optical counterparts in the Sloan Digital Sky Survey. The origin of these dark clouds is unknown. They might be crucial objects since they could be the so-called dark galaxies, that is, the dark matter halos without stellar content that are expected from cosmological simulations.In order to reveal the nature of the dark clouds, we took a deep optical image of one them, AGESVC1 282, with the newly-commissioned 1.4m Milankovic Telescope. After observing it for 10.4h in the L-filter, the image reached a surface-brightness limit of about 29.1mag/arcsec2 in V. No optical counterpart was detected. We placed an upper limit on the V-band luminosity of the object of 1.1x107L, giving a stellar mass below 1.4x107M and a HI-to-stellar mass ratio above 3.1. By inspecting archival HI observations of the surrounding region, we found that none of the standard explanations for optically dark HI clouds fits the available constraints on this object.

Abstract Copyright: © M. Bílek et al. 2020

Journal keyword(s): galaxies: individual: AGESVC1 282 - galaxies: formation - techniques: image processing - galaxies: interactions - galaxies: structure - galaxies: clusters: intracluster medium

VizieR on-line data: <Available at CDS (J/A+A/642/L10): list.dat fits/*>

Simbad objects: 12

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