Arp 19 (Gary Imm)

Arp 19

This object, also known as NGC 145, is a spiral galaxy located 190 million light years away in the constellation of Cetus at a declination of -5 degrees. It spans almost 2 arc-minutes in our apparent view, which translates to a diameter of 100,000 light years. I am shocked that this interesting galaxy has not been studied, at least that I could find.

This galaxy was placed by Dr. Arp into his small category of “3 Armed Galaxies”. That isn’t a great way to describe this galaxy in my opinion. The slightly barred core of this galaxy, yellow in color, is slightly above (north) of the galaxy center. 2 strong arms are apparent, similar to a grand design galaxy, except that one of those arms has been disturbed and “bent” about 90 degrees clockwise - instead of heading straight down in the image, it heads to the left. 4 other star cluster regions seem to add a number of stubby arms to the central galaxy region. The lower right half of the disk is fascinating for its dearth of stars.

So, this galaxy is obviously disturbed. But who did it? There are a lot of candidates in this field, to the east (left) of Arp 19, but they all look small and indeed the few distance estimates we have for these other galaxies place them twice as far away. My best guess is that the culprit was a small companion which is in the process of being absorbed. The companion could be “hiding” as one of the brighter odd regions in Arp 19 itself.

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Status	Advanced success
Started	...
Astrometry.net job	4098580
PixInsight job	64HAW6Y3OY7Q99FSGUYJWICRBRAYRUO0
PixInsight queue size	n/a
PixInsight stage	n/a

RA (center)	00h31m45s.492
RA (top/left)	00h32m22s.829
RA (top/right)	00h31m07s.344
RA (bottom/right)	00h31m08s.130
RA (bottom/left)	00h32m23s.659

Dec (center)	-05°09′14″.60
Dec (top/left)	-05°01′36″.19
Dec (top/right)	-05°01′51″.58
Dec (bottom/right)	-05°16′51″.78
Dec (bottom/left)	-05°16′36″.37

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