Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.8005c&link_type=abstract
American Astronomical Society Meeting 207, #80.05; Bulletin of the American Astronomical Society, Vol. 37, p.1297
Astronomy and Astrophysics
Astrophysics
2
Scientific paper
The Virgo Intra-Cluster Stars (VICS) project is a 37 orbit HST program to study the stellar constituents of Virgo's intracluster space. The survey is centered on a region of space 180 kpc (projected) from the nearest major galaxy (M 86), at a location where the underlying cluster surface brightness is μ V ˜ 27.5 ± 0.5. The data include extremely deep V (F606W) and I (F814W)-band images with the ACS, parallel I-band images with WFPC2, and parallel J and H images with NIC3. The ACS images alone contain ˜ 4000 intracluster red giant candidates, 4 probable intracluster globular clusters, one previously uncatalogued dwarf spheroidal galaxy, and many V-band dropouts, both resolved and unresolved. The principle goal of the survey is to determine the metallicity distribution of Virgo's intracluster stars and thereby constrain their origins. However, since the images extend down to I lim ˜ 28.7 and V lim ˜ 30.0, they are amongst the deepest HST images ever taken. The data therefore have many other uses in astrophysics.
Support for this work was provided by NASA through grant number GO-10131 from the Space Telescope Science Institute.
Aguerri A.
Arnaboldi Magda
Ciardullo Robin
Durrell Patrick R.
Feldmeier John . J.
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