Astrophysics (Index)About

low-surface-brightness galaxy

(LSB galaxy)
(galaxies less bright than those historically identified)

A low-surface-brightness galaxy (LSB galaxy) is a galaxy that is dimmer than what is usually seen and catalogued. Once the brightness of observed galaxies was characterized, it was theorized that there might be more galaxies that were missed because they are dimmer, i.e., a selection bias, and this proved to be the case. They include galaxies as dim as the surrounding sky, or more. With this discovery, the term high-surface-brightness (HSB) galaxy is used in contrast with LSB galaxy to represent the type that was already known. As a group, LSB galaxies show a high mass-to-luminosity ratio, suggesting a greater than usual percentage of its matter being dark. They are often dwarf galaxies. They also show few supernovae.


(galaxy type,EMR,infrared,bias)
Further reading:
https://en.wikipedia.org/wiki/Low-surface-brightness_galaxy
https://astronomy.swin.edu.au/cosmos/l/Low+Surface+Brightness+Galaxy
http://ned.ipac.caltech.edu/level5/Bothun/frames.html
https://ui.adsabs.harvard.edu/abs/2021MNRAS.503..830S/abstract

Referenced by pages:
field galaxy
Freeman's law
rare designator prefixes
ultra diffuse galaxy (UDG)
ultra-faint dwarf galaxy (UFD)

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