Dwarf Galaxies as Low Surface Brightness Galaxies

Low Surface Brightness Galaxies

DWARF AND LOW SURFACE BRIGHTNESS GALAXIES Field Populations

The terms `dwarf' and `low surface brightness' are commonly used to mean a variety of di erent things, and are sometimes used interchangeably. It is thus necessary to explicitly quantify the de nitions which are adopted. Here I shall limit the discussion to eld galaxies which are [exponential] disks characterized by a scale size h and central surface brightness 0. The word dwarf implies things ...

The HI Companions of HII Galaxies and Low Surface Brightness Dwarf Galaxies

I study the VLA HI survey of HII galaxies by Taylor et al. (1995, ApJS, 99, 427; 1996, ApJS, 102, 189) and the VLA HI survey of low surface brightness (LSB) dwarf galaxies by Taylor et al. (1996, in press) to investigate the role of galaxy interactions in triggering the bursts of massive star formation seen in HII galaxies. Comparing the two surveys, I find that HII galaxies have companions mor...

“Chain” Galaxies are Edge-On Low Surface Brightness Galaxies

Deep HST WFPC2 images have revealed a population of very narrow blue galaxies which Cowie et al. (1996) have interpreted as being a new morphological class of intrinsically linear star forming galaxies at z = 0.5 − 3. We show that the same population exists in large numbers at low redshifts (z ≈ 0.03) and are actually the edge-on manifestation of low surface brightness disk galaxies. Subject he...

Nearby Gas-Rich Low Surface Brightness Galaxies

We examine the Fisher–Tully cz < 1000 km s galaxy sample to determine whether it is a complete and representative sample of all galaxy types, including low surface brightness populations, as has been recently claimed. We find that the sample is progressively more incomplete for galaxies with (1) smaller physical diameters at a fixed isophote and (2) lower HI masses. This is likely to lead to a ...