Low surface brightness galaxies

http://astrothesaurus.org/uat/940

alt label
LSBG
UDG
Ultra diffuse galaxies
Ultra diffuse galaxy
Ultra-diffuse galaxies
Ultra-diffuse galaxy
Ultradiffuse galaxies
Ultradiffuse galaxy
dcterms created equal to or less than 2016-11-01T17:58:24.000Zequal to or more than 2016-11-01T17:58:24.000Z
dcterms modified equal to or less than 2020-11-09T21:21:55.076Zequal to or more than 2020-11-09T21:21:55.076Z
broader
http://astrothesaurus.org/uat/573 original
narrower
940 original
definition A member of a particularly faint population of galaxies with a central surface brightness below the brightness of the background sky. The central regions of many of them resemble a dwarf galaxy, but most of the mass is contained in a large gaseous disk of low density that is observable only with long-exposure optical images or at radio wavelengths. Some are as massive as a large spiral galaxy, for example Malin 1. The proportion of LSBGs relative to normal galaxies is unknown. They may however represent a significant fraction of mass in the Universe. LSBGs are thought to be primitive systems because they have total masses similar to normal galaxies, but have typically converted less than 10% of their gas into stars. Spiral LSBGs do not obey Freeman's law.
narrower
http://astrothesaurus.org/uat/895 original
broader
940 original
type
Resource original
Concept original
contributor AAS_Frey.Katie_Admin original
creator AAS_Frey.Katie original