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An image of NGC 45, a low surface brightness spiral galaxy, by GALEX. UGC 477 is located over 110 million light-years away in the constellation of Pisces. [1]A low-surface-brightness galaxy, or LSB galaxy, is a diffuse galaxy with a surface brightness that, when viewed from Earth, is at least one magnitude lower than the ambient night sky.
UGC 6614 is classified as a low surface brightness (LSB) galaxy. [3] [4] [5] The galaxy is nearly face-on and has a ring-like feature around its bulge, [6] with distinctive extended spiral arms. [7] The bulge of UGC 6614 is found to be red, similar to those of S0 and other elliptical galaxies, hinting at the existence of an old star population. [8]
[23] [24] Additionally, detailed investigations of the rotation curves of low-surface-brightness galaxies (LSB galaxies) in the 1990s [25] and of their position on the Tully–Fisher relation [26] showed that LSB galaxies had to have dark matter haloes that are more extended and less dense than those of galaxies with high surface brightness ...
Example Type Image Information Notes SAB0- SAB0- is a type of lenticular galaxy: SAB0 SAB0 is a type of lenticular galaxy: SAB0+ SAB0+ is a type of lenticular galaxy: SAB0/a SAB0/a can also be considered a type of intermediate lenticular galaxy: Messier 65: SABa M65 is an "SAB(rs)a" NGC 4725: SABab NGC 4725 is an "SAB(r)ab pec" Messier 66: SABb
First low surface brightness galaxy: Malin 1: Coma Berenices: 1986 Malin 1 was the first verified LSB galaxy. LSB galaxies had been first theorized in 1976. [26] First superluminal jet from a Seyfert III Zw 2: Pisces [27] 2000 [28]
A truly dark sky has a surface brightness of 2 × 10 −4 cd m −2 or 21.8 mag arcsec −2. [9] [clarification needed] The peak surface brightness of the central region of the Orion Nebula is about 17 Mag/arcsec 2 (about 14 milli nits) and the outer bluish glow has a peak surface brightness of 21.3 Mag/arcsec 2 (about 0.27 millinits). [10]
In visible light, the galaxy exhibits an overall bluish color and as it is relatively dim for a galaxy of its size, it is classified as a low surface brightness galaxy (LSB). [ 2 ] [ 3 ] NGC 5866B is located relatively close in the sky to the more well-known NGC 5907 (Splinter Galaxy) and NGC 5866 (Spindle Galaxy).
Sometimes there is an observed truncation in the surface brightness profiles of lenticular galaxies at ~ 4 disk scalelengths. [7] These features are consistent with the general structure of spiral galaxies. However, the bulge component of lenticulars is more closely related to elliptical galaxies in terms of morphological classification.