NGC 4753 (Gary Imm)

Celestial hemisphere: Southern · Constellation: Virgo (Vir) · Contains: NGC 4753

NGC 4753

This object is a lenticular galaxy located 80 million light years away in the constellation of Virgo at a declination of -1 degrees. The galaxy has a visual magnitude of 9.9 and a surface brightness of 12.2 It spans 5 arc-minutes in our apparent view, which corresponds to an actual diameter of 110,000 light years.

This object is amazing in appearance because of the abundance and apparent random nature of the dust lanes. But a 1992 paper, “The Remarkable Twisted Disk of NGC 4753 and the Shapes of Galactic Halos” by Steiman-Cameron, Kormendy and Durisen, puts forth a convincing (though tough for me to fully understand) explanation for the dust lane patterns. This dust was originally in the form of an accretion disk from a merger with a gas rich dwarf galaxy, tilted at an angle of 15 degrees. This disk was then twisted by differential precession into the shape we see today, essentially a sheet being wrapped around by gravitation interaction. The paper's resulting three dimensional model, which I have overlayed over the image in the Astrobin mouseover, explains many of the dust lanes but not all of them.

Much fainter, although still interesting to me, are the extended star streams beyond the galaxy disk. They extend from the upper left to the lower right.

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Description: Model overlay from 1992 paper

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Status	Advanced success
Started	...
Astrometry.net job	3394978
PixInsight job	Y092U326BGDQ3BHE9SU59WUFKJKNUCIC
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	12h52m22s.173
RA (top/left)	12h52m51s.117
RA (top/right)	12h51m53s.415
RA (bottom/right)	12h51m53s.230
RA (bottom/left)	12h52m50s.937

Dec (center)	-01°11′53″.29
Dec (top/left)	-01°06′29″.92
Dec (top/right)	-01°06′26″.51
Dec (bottom/right)	-01°17′16″.39
Dec (bottom/left)	-01°17′20″.18

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NGC 4753

NGC 4753

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NGC 4753

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