NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-06-18 T21:26:56 PDT
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For refcode 2003AJ....125..667H:
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Copyright by American Astronomical Society. Reproduced by permission
2003AJ....125..667H A SEARCH FOR H I IN FIVE ELLIPTICAL GALAXIES WITH FINE STRUCTURE J. E. HIBBARD National Radio Astronomy Observatory, 520 Edgemont Road, Charlottesville, VA 22903; jhibbard@nrao.edu AND A. E. SANSOM Centre for Astrophysics, University of Central Lancashire, Preston PR1 2HE, UK; AESansom@uclan.ac.uk Received 2002 August 14; accepted 2002 October 30 ABSTRACT We report on VLA H I spectral line observations of five early-type galaxies classified as optically peculiar because of the presence of jets, ripples, or other optical fine structure. We detect H I within the primary beam (30' half-power beamwidth) in four of the five systems. However, in only one case is this gas associated with the targeted elliptical galaxy. In the other cases the H I is associated with a nearby gas-rich disk or dwarf galaxy. The one H I detection is for NGC 7626, where we tentatively detect an H I cloud lying between 20 and 40 kpc southwest of the galaxy center. Its origin is unclear. Our failure to detect obvious tidal H I features suggests that if these fine-structure elliptical galaxies are remnants of disk galaxy mergers, either the progenitors were gas-poor or they are well evolved and any gaseous tidal features have dispersed and/or been converted into other phases. Our targeted systems all reside in groups or clusters, and it seems likely that tidal H I is shorter lived in these environments than suggested by studies of more isolated merger remnants. Key words: galaxies: individual (NGC 3610, NGC 3640, NGC 4382, NGC 5322, NGC 7626) - galaxies: interactions - galaxies: ISM - galaxies: peculiar
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