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KUG 2348+270A a neat ring galaxy you've never heard of



 
 
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Old July 31st 11, 08:59 PM posted to alt.binaries.pictures.astro
Rick Johnson[_2_]
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Default KUG 2348+270A a neat ring galaxy you've never heard of

KUG 2348+270A also known as PGC 72600 is an Arp like galaxy that happens
to be on the edge of the galaxy cluster Abell 2666. It is in Pegasus,
about 350 million light-years distant. It's in the Great Square not far
from Alpheratz (Alpha Andromedae). While I have many Abell clusters on
the to-do list this came as a surprise. I raised KUG 2348+270A high to
pick up much of the cluster but not so high vignetting reduced my
ability to pick up the plumes. Arp put many galaxies with plumes just
like this one on his list. He put them under many different categories
however not realizing they were all caused by gravitational interaction
with some other galaxy. In the case of KUG 2348+270A the galaxy
involved seems to have hit and run. Now there's a whole cluster of them
to choose from. None of which seem all that disturbed. I suppose it
could be a merger situation though I see no real evidence for this

KUG 2348+270A has both a large but faint arm on its eastern side that
wraps around under the galaxy then explodes in the plume as well as an
odd arm pointing north (up) that also seems to have a lot of tidal stars
pulled from it creating a puff of stars about it. The arms seem to
create a ring that doesn't attach to the core. NED makes no attempt to
classify it other than as a LINER spiral galaxy of magnitude 15. I see
a hint of a bar running from the north northwest to the south southwest.
I found no papers discussing either tidal feature. It has likely had
an interaction with another member of Abell 2666.

Abell 2666 is described at NED as having a diameter of 50 minutes which
puts its edges well beyond my field though it seems to have run out of
members to the north at KUG 2348+270A's distance from its core. It's
core as defined by NED is nearly the same as the cD galaxy anchoring
the cluster, NGC 7768, a huge elliptical galaxy of 13th magnitude.

The field is outside the DR7 Sloan Survey area that has been picked up
by NED. It is in the DR8 survey area that NED has not yet incorporated
in its data base. The Sloan image I've included came from this later
survey. Without Sloan data I didn't expect much in the way of redshift
data but apparently the Abell 2666 cluster has been well studied making
for a good deal of data on its galaxies. I've identified all that are in
my image that NED knows about. I even identified them along with
showing their redshift light travel distance in billions of light-years.
Some had no redshift data indicated by a question mark after the
catalog name. I used the primary designation NED used so the catalogs
are quite varied. Many are likely new to you.

KUG = Kiso Ultraviolet Galaxy Catalogue
GIN = Galaxy Index Number
AGC = Arecibo General Catalog
LCSB = Low Central Surface Brightness

Just east of NGC 7768 is a blue star-like object whose position matches
that of 2MASX J23510292+2708335. It is listed also as a radio galaxy in
the NRAO VLA Sky Survey. I find nothing on its visual or IR listing.
By radio it is listed as being from 5 to 10 seconds in size. Problem is
that on my image it appears starlike with a PSF matching that of stars
in the area. I see no galaxy. Adding to the problem is that its
location has an error bar of 1.25 seconds. Nor does the DR8 survey show
anything other than what appears to be a blue star at this position. I
can't help but think something is in error here. I put 2 question marks
after its designation for this reason.

In the lower right corner is the asteroid (19711) 1999 TG219 shining at
an estimated 18th magnitude. It is partly overlapping a distant galaxy.

14" LX200R @ f/10, L=4x10' RGB=2x10'x3, STL-11000XM, Paramount ME

Rick
--
Correct domain name is arvig and it is net not com. Prefix is correct.
Third character is a zero rather than a capital "Oh".

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