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A study of H I-selected galaxies in the Hercules cluster*
Citation
Iglesias-Paramo, J and van Driel, W and Duc, PA and Papaderos, P and Vilchez, JM and Cayatte, V and Balkowski, C and O'Neil, K and Dickey, JM and Hernandez, H and Thuan, TX, A study of H I-selected galaxies in the Hercules cluster*, Astronomy and Astrophysics, 406, (2) pp. 453-469. ISSN 0004-6361 (2003) [Refereed Article]
DOI: doi:10.1051/0004-6361:20030626
Abstract
The present study focuses on a sample of 22 galaxies detected in the blind VLA HI survey of the Hercules cluster by Dickey (1997), 18 of which were selected on an HI line width smaller than 270 km s-1 and 4 others with only tentative optical counterparts in the Palomar Sky Survey. Sensitive single-dish HI line spectra were obtained for 20 of them, and for one the VLA detection was not confirmed. Optical surface photometry has been carried out for 10 objects, for 8 of which optical spectroscopy was obtained as well. Based on various criteria, we classify two sample galaxies (ce-143 and ne-204) as genuine dwarfs whereas the remaining sample objects are found to be intrinsically luminous galaxies. For those objects investigated in optical wavelengths we determine properties similar to those of actively star-forming galaxies, and find that approximately one half of them has properties intermediate between those of dwarf galaxies and low-luminosity disc galaxies. No optical redshifts could be determined for two of the galaxies (sw-103 and sw-194) and their physical association with the H I clouds detected at their positions therefore remains uncertain. A particularly interesting object in our sample is the Tidal Dwarf Galaxy candidate ce-061 in the galaxy merger IC 1182.
Item Details
Item Type: | Refereed Article |
---|---|
Research Division: | Physical Sciences |
Research Group: | Astronomical sciences |
Research Field: | Galactic astronomy |
Objective Division: | Expanding Knowledge |
Objective Group: | Expanding knowledge |
Objective Field: | Expanding knowledge in the physical sciences |
UTAS Author: | Dickey, JM (Professor John Dickey) |
ID Code: | 35940 |
Year Published: | 2003 |
Web of Science® Times Cited: | 14 |
Deposited By: | Physics |
Deposited On: | 2005-09-20 |
Last Modified: | 2005-09-20 |
Downloads: | 0 |
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