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For refcode 1988AJ.....96.1511S:
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1988AJ.....96.1511S EMISSION-LINE GALAXIES IN THE SLICE OF THE UNIVERSE JOHN J. SALZER Department of Astronomy, University of Michigan, Ann Arbor, Michigan 48109 and Arecibo Observatory, National Astronomy and Ionosphere Center, P.O. Box 995, Arecibo, Puerto Rico 00613 GREGORY S. ALDERING, GREGORY D. BOTHUN, AND JOSEPH M. MAZZARELLA Department of Astronomy, University of Michigan, Ann Arbor, Michigan 48109 CAROL J. LONSDALE Infrared Processing and Analysis Center, California Institute of Technology, MS 100-22 Pasadena, California 91125 and Jet Propulsion Laboratory, Pasadena, California 91125 Received 22 March 1988;revised 11 July 1988 ABSTRACT We compare the relative spatial distributions of emission-line galaxies (ELGs) with normal galaxies that lie in the area of the sky included in the "Slice of the Universe" (Slice) survey. The 218 ELGs in our sample are selected almost exclusively from three objective-prism surveys and hence form a well-defined and independently selected subset of the galaxies in this field. We have supplemented the ELG sample with additional galaxies detected as having warm far-infrared colors by the Infrared Astronomical Satellite (IRAS). We find that the ELGs follow the same spatial distribution as outlined by the Slice galaxies, with the important exception that they strongly avoid the Coma Cluster. The ELGs in this sample are not found to favor regions of very low density (voids), as has been suggested by previous studies of the distribution of objects of this type. However, the luminosity distribution of the current ELG sample is such that luminosity/mass-dependent effects on the spatial distribution (e.g., biased galaxy formation) would not be noticeable. We suggest that deep ELG surveys can be useful and very efficient tools for mapping the large-scale structure of the local universe. In particular, the rapid areal coverage obtainable by using ELG surveys could point to regions where deep magnitude-limited redshift surveys would be especially advantageous.
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