Investigating the properties of interacting void galaxies from the SDSS

Details Investigating the properties of interacting void galaxies from the SDSS Investigating the properties of interacting void galaxies from the SDSS

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009noao.prop..363p&link_type=abstract

NOAO Proposal ID #2009A-0363

Physics

Scientific paper

Galaxies in the most underdense regions of the universe, the voids, have quite different evolutionary histories than those in more dense regions. In particular, the frequency of interactions and their histories (major and minor mergers) are strongly affected by this low density environment. A galaxy's merger history determines the growth rate of its central black hole, which is estimated from the nuclear emission-line properties. We propose to observe potentially interacting void galaxies identified from the Sloan Digital Sky Survey (SDSS) in order to look for merger-induced star-formation and active galactic nucleus (AGN) activity. The results will help determine the effects of environment on galaxy evolution and help address the issue of the "void phenomenon;" the apparent lack of faint galaxies in void regions.

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