Mathematics – Logic
Scientific paper
Jun 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003msngr.112...37a&link_type=abstract
The Messenger (ISSN 0722-6691), No. 112, p. 37 - 39 (June 2003)
Mathematics
Logic
1
Planetary Nebulae, Intracluster Light, Clusters Of Galaxies
Scientific paper
The results obtained so far from IC PNe samples have shown that I) the fraction of the diffuse light in the Virgo cluster amounts to 10%-40%; II) the intracluster stars of Virgo are not centrally condensed and not uniformly distributed and III) the front edge of the Virgo cluster is about 20% closer to us than M87. A high-resolution collisionless N-body simulation of a Virgo-like cluster at z = 0 predicts strong substructure in phase space, so our next goal will be to look for substructure in the radial velocity distribution of ICPN candidates in Virgo. The VLT instruments, FLAMES and VIMOS, will be most important in giving us the radial velocity distribution of the stars in the diffuse component, identifying individual streams, and poviding us with samples of the phase space for the diffuse component at different cluster radii. These observational results will be compared with N-body high resolution cosmological simulations and in this way we should be able to determine how old dynamically the diffuse light is.
Arnaboldi Magda
Freeman Ken C.
Gerhard Ortwin
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