NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2018-12-17 T01:18:21 PST
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For refcode 2002ApJS..142..161P:
Retrieve 55 NED objects in this reference.
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Copyright by American Astronomical Society. Reproduced by permission
2002ApJS..142..161P An H I/Optical Atlas of Isolated Galaxies D. J. Pisano and Eric M. Wilcots Astronomy Department, University of Wisconsin-Madison, 475 North Charter Street, Madison, WI 53706 and Charles T. Liu Department of Astrophysics and Hayden Planetarium, American Museum of Natural History, Central Park West at 79th Street, New York, NY 10024 Received 2002 March 25; accepted 2002 May 15 ABSTRACT We present an H I and optical survey of 41 extremely isolated galaxies in an attempt to search for the gaseous remnants of the galaxy formation process, predicted to exist by hierarchical models of galaxy formation. By observing extremely isolated, quiescent, nonpeculiar galaxies we minimize the chances that any extragalactic H I found will be another galaxy, tidal debris, or ejecta from a galactic fountain or superwind. We have obtained new and archival data from the VLA and ATCA in a search for H I clouds down to M_H I_ ~ 10^7^ M_sun_ around these galaxies. We found 13 H I-rich companions around 10 of the 41 galaxies surveyed. Optical imaging finds spatially coincident stars associated with all 13 companions. We find that the isolated galaxies have properties fairly similar to those of field galaxies, while the companions are similar to dwarf irregular galaxies. The presence of stars in all 13 companions suggests that H I clouds without stars discovered by other authors around field galaxies are not primordial and most likely have either a tidal or ejecta origin. Subject headings: atlases - galaxies: evolution - galaxies: formation - galaxies: fundamental parameters - galaxies: ISM - galaxies: spiral
Retrieve 55 NED objects in this reference.
Please click here for ADS abstract

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