Mathematics
Scientific paper
Feb 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996segt.book.....p&link_type=abstract
Search for emission-line galaxies towards nearby voids., by Popescu, C. C.. Heidelberg Univ. (Germany). Naturwissenschaftlich-M
Mathematics
Scientific paper
Recent redshift surveys of galaxies revealed that bright galaxies are distributed in sheet-like structures which surround large voids. Still under debate is the question whether all galaxies follow this non-uniform distribution or if less luminous galaxies are more equally distributed. Given the limitation of the recent surveys, the observed emptiness of the voids may be a result of observational bias. To test this assertion, an observational programme to search for emission-line dwarf galaxies in nearby voids was undertaken. The author compares the observational results with the prediction of theories of galaxy formation. The most robust result of this study is that the well-defined nearby voids do not contain emission-line galaxies. This is taken as support for the idea that the voids are real structures, and not simply the results of observational biases. One cannot exclude completely that the emission-line galaxies found in the background voids form a void population, however this would make the emptiness of the foreground voids puzzling.
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