LSB galaxies

LSB galaxies

Short for low surface brightness galaxies. Galaxies with a very low central surface brightness that may be very common and contain much of the mass in the Universe. They are difficult to detect against the brightness of the night sky and are thus missing from most galaxy catalogs. They are thought to be unevolved systems, with central regions resembling a dwarf galaxy. Most of the mass is contained in a large gaseous disk that is observable only at radio wavelengths or with image-enhanced exposures. The galaxies are thus commonly referred to as icebergs. See Malin 1.
References in periodicals archive ?
There were no dynamical data for LSB galaxies at the time when MOND was suggested, so this was a prediction of MOND (Scarpa 2006).
Only a very small number of LSB galaxies were known to exist at the time MOND was proposed.
The importance of MONDian effects differs for HSB and LSB galaxies and depends on the average surface brightness of the galaxy.
LSB galaxies are very diffuse and hard to detect against the "noise" of the night-sky background, even when observed from a site with little artificial light pollution (S&T: April 1998, page 28).
Although usually quite small, LSB galaxies exhibit the whole range of galactic forms.
In addition to the small LSB galaxies, researchers have detected three dim giants, the latest being 1226 + 0105 in Virgo.