Found: High Surface Brightness Compact Galaxies

Found : High Surface Brightness Compact Galaxies

We are using the 2dF spectrograph to make a survey of all objects (" stars " and " galaxies ") in a 12 deg 2 region towards the Fornax cluster. We have discovered a population of compact emission-line galaxies unresolved on photographic sky survey plates and therefore missing in most galaxy surveys based on such material. These galaxies are as luminous as normal field galaxies. Using Hα to esti...

Low Surface Brightness Galaxies

High-Resolution Rotation Curves of Low Surface Brightness Galaxies.

High-resolution Halpha rotation curves are presented for five low surface brightness galaxies. These Halpha rotation curves have shapes different from those previously derived from H i observations, probably because of the higher spatial resolution of the Halpha observations. The Halpha rotation curves rise more steeply in the inner parts than the H i rotation curves, and they reach a flat part...

High surface brightness dwarf galaxies in the FornaxclusterMichael

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 17:3 and found seven new compact dwarf cluster members that were not classiied in previous surveys as members of the cluster. These are amongst the most compact, high surface brightness dwarf galax...

High-resolution Rotation Curves of Low Surface Brightness Galaxies: Data

We present long slit Hα observations of 50 low surface brightness galaxies. Of these, 36 are of sufficient quality to form rotation curves. These data provide a large increase in the number of low surface brightness galaxies for which accurate rotation curves are available. They also represent an order of magnitude improvement in spatial resolution over previous 21 cm studies (1 to 2 instead of...