Volume 399, Number 2, February IV 2003
|Page(s)||433 - 439|
|Section||Cosmology (including clusters of galaxies)|
|Published online||07 February 2003|
Non-confirmation of reported clouds without optical counterparts in the Hercules cluster
Observatoire de Paris, Section de Meudon, GEPI, CNRS UMR 8111, 5 place Jules Janssen, 92195 Meudon, France e-mail: firstname.lastname@example.org;email@example.com;firstname.lastname@example.org
2 Arecibo Observatory, HC3 Box 53995, Arecibo, Puerto Rico 00612, USA e-mail: email@example.com;firstname.lastname@example.org
3 CNRS URA 2052 and CEA, DSM, DAPNIA, Service d'Astrophysique, Centre d'Études de Saclay, 91911 Gif-sur-Yvette Cedex, France e-mail: email@example.com
4 Department of Astronomy, University of Minnesota, Minneapolis, USA e-mail: firstname.lastname@example.org
5 Laboratoire d'Astrophysique de Marseille, Traverse du Siphon – Les Trois Lucs, 13376 Marseille, France e-mail: email@example.com
6 Universitäts-Sternwarte, Geismarlandstrasse 11, 37083 Göttingen, Germany e-mail: firstname.lastname@example.org
7 Instituto de Astrofísica de Andalucía (CSIC), Granada, Spain e-mail: email@example.com
8 Astronomy Department, University of Virginia, Charlottesville, VA 22903, USA e-mail: firstname.lastname@example.org
Corresponding author: W. van Driel, email@example.com
Accepted: 7 November 2002
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 [CITE]) 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.
Key words: galaxies: clusters: general / galaxies: clusters: individual: Hercules cluster / galaxies: ISM / radio lines: galaxies
© ESO, 2003
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.