Arp 175 (Gary Imm)

Arp 175

This object is an interesting small group of galaxies located away in the constellation of Virgo at a declination of +11 degrees.

This is a complex scene. The most fascinating piece is the interaction between the central 2 elliptical galaxies, IC 3481 to the upper right and IC 3481A (PGC 41646 in the mouseover) to the lower left. They are both 350 million light years away. IC 3481 is 120,000 light years in diameter and is classified as an elliptical galaxy, but it looks to me that it has a polar ring around it from interaction with IC 3481A. A strong star stream connects these 2 galaxies.

The galaxy IC 3483 is to the lower left, below the bright star. It has an interesting disk structure, with a ring that almost completely surrounds in the inner half of the disk.

Between these galaxy systems, a faint star stream is seen stretching from one to the other. Because of this star stream, these systems were originally thought to be interacting as one. But now it is known that IC 3483 is much closer and it is not possible for it to be interacting with the other galaxy system.

So the question is, what is the origin of the faint star stream in-between IC 3481/3481A and IC 3483? Is it connected with either object, or neither? Distance estimates for star streams are not possible to my knowledge, so we may never know the answer. Chalk it up to another mystery.

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Status	Advanced success
Started	...
Astrometry.net job	3597221
PixInsight job	D7KDMY6ZDQV2KC7C6SNP7KZOFJX4AFFM
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	12h32m58s.698
RA (top/left)	12h33m40s.286
RA (top/right)	12h32m15s.776
RA (bottom/right)	12h32m17s.141
RA (bottom/left)	12h33m41s.579

Dec (center)	+11°22′33″.27
Dec (top/left)	+11°30′31″.97
Dec (top/right)	+11°30′05″.83
Dec (bottom/right)	+11°14′34″.17
Dec (bottom/left)	+11°15′00″.35

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Arp 175

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