High surface brightness dwarf galaxies in the Fornax cluster

Drinkwater, Michael J. and Gregg, Michael D. (1998) High surface brightness dwarf galaxies in the Fornax cluster. Monthly Notices of The Royal Astronomical Society, 296 1: L15-L19. doi:10.1046/j.1365-8711.1998.01578.x


Author Drinkwater, Michael J.
Gregg, Michael D.
Title High surface brightness dwarf galaxies in the Fornax cluster
Journal name Monthly Notices of The Royal Astronomical Society   Check publisher's open access policy
ISSN 0035-8711
1365-2966
Publication date 1998-05
Sub-type Letter to editor, brief commentary or brief communication
DOI 10.1046/j.1365-8711.1998.01578.x
Open Access Status DOI
Volume 296
Issue 1
Start page L15
End page L19
Total pages 5
Place of publication Oxford, United Kingdom
Publisher Oxford University Press
Language eng
Abstract We describe a search for compact dwarf galaxies in the Fornax cluster using the FLAIR spectrograph on the UK Schmidt Telescope. We measured radial velocities of 453 compact galaxies brighter than B-T approximate to 17.3 and found seven new compact dwarf cluster members that were not classified in previous surveys as members of the cluster. These are amongst the most compact, high surface brightness dwarf galaxies known. The inclusion of these galaxies in the cluster does not change the total luminosity function significantly, but they are important because of their extreme nature; one in particular appears to be a dwarf spiral. Three of the new dwarfs have strong emission lines and we identify them as blue compact dwarfs (BCDs), doubling the number of confirmed BCDs in the cluster. We also determined that none of the compact dwarf elliptical (M32-like) candidates is in the cluster, down to an absolute magnitude M-B = -13.2. We have investigated the claim of Irwin et al. that there is no strong relation between surface brightness and magnitude for the cluster members and find some support for this for the brighter galaxies (B-T < 17.3), but fainter galaxies still need to be measured.
Keyword Astronomy & Astrophysics
Galaxies, Clusters, Individual, Fornax
Galaxies, Compact
Galaxies, Formation
Galaxies, Luminosity Function, Mass Function
Elliptical Galaxies
Virgo Cluster
Photometry
Population
Origin
Q-Index Code CX
Q-Index Status Provisional Code
Institutional Status Unknown

Document type: Journal Article
Sub-type: Letter to editor, brief commentary or brief communication
Collection: School of Physical Sciences Publications
 
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Created: Mon, 13 Aug 2007, 10:28:20 EST