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Non-confirmation of reported H I clouds without optical counterparts in the Hercules cluster

Citation

van Driel, W and O'Neil, K and Cayatte, V and Duc, PA and Dickey, JM and Balkowski, C and Hernandez, H and Iglesias-Paramo, J and Papaderos, P and Vilchez, JM and Thuan, TX, Non-confirmation of reported H I clouds without optical counterparts in the Hercules cluster, Astronomy and Astrophysics, 399, (2) pp. 433-439. ISSN 0004-6361 (2003) [Refereed Article]

DOI: doi:10.1051/0004-6361:20021684

Abstract

21 cm H I line observations were made with the Arecibo Gregorian telescope of 9 H I clouds in the Hercules Cluster which were reported as tentative detections in a VLA H I study of the cluster (Dickey 1997) and for which our deep CCD imaging failed to find any optical counterparts. No sensitive observations could be made of one of these (sw-174) due to the presence of a close-by strong continuum source. The other 8 tentative H I detections were not confirmed by the Arecibo H I measurements. The CCD images did reveal faint, low surface brightness counterparts near the centres of two other VLA H I sources invisible on the Palomar Sky Survey, sw-103 and sw-194.

Item Details

Item Type:Refereed Article
Research Division:Physical Sciences
Research Group:Astronomical and Space Sciences
Research Field:Galactic Astronomy
Objective Division:Expanding Knowledge
Objective Group:Expanding Knowledge
Objective Field:Expanding Knowledge in the Physical Sciences
Author:Dickey, JM (Professor John Dickey)
ID Code:35947
Year Published:2003
Web of Science® Times Cited:3
Deposited By:Physics
Deposited On:2005-09-20
Last Modified:2005-09-20
Downloads:0

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