ASTRO: Abell 2197 and Super weird UGC 10704

UGC 10704 is a really messed up blue galaxy in the Abell 2197 galaxy
cluster located in western Hercules. This is another one Sakib Rasool
pointed me to.

Redshift puts it 384 million light-years away with the Abell cluster
center about 35 million light-years further away. There are only two
notes at NED on the galaxy, one saying it has 5 clumps of HII and
another calling it a group of blue galaxies. Not much agreement here!
The SDSS lists it under several different galaxy designations but NED
has an Essential Note that says these are multiple entries that describe
the same object. Again little help. Looking at the SDSS data in NED
you find three clumps identified. One is within 2 seconds of arc of the
centroid position the UGC uses. The other two are shown on the
annotated image. I find it interesting that what appears to be the core
as it is more orange than the other parts as well as a detached south
west and a south to southeast part are not listed. If any are a
separate galaxy I'd think it the southwestern apparently detached part.
Why do I try and look these things up?

Being located on the edge of the Abell 2197 galaxy cluster there are a
lot of galaxies in the image. Like some other Hercules galaxy clusters
it has a higher proportion of disk galaxies than most. For the
annotated image if the galaxy was likely a member of the cluster I
identified it by catalog name as well as showing its redshift. Those
beyond the cluster are shown only by distance. Note that some of the
very distant (over 2 billion light-years distant) galaxies are larger in
angular size than many dwarf cluster members. Often the main way to
tell a distant one is that it is redder than close ones though that
isn't always true. There are some intensely blue distant galaxies in
the image.

It also contains quite a few UvES (Ultraviolet Excess Objects). This
are found photographically and are likely quasars. With only a
photographic redshift this isn't as accurate as spectroscopic
measurement. Only one proven quasar is in the image and it is very blue
and 11.1 billion light-years distant light travel time. It is up toward
the upper right corner of the image.

I've also included the Sloan Survey image of this oddball 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".

Rick,

once again you managed to pull an amazing level of detail out of these tiny
galaxies.

Stefan

"Rick Johnson" schrieb im Newsbeitrag
. com...
UGC 10704 is a really messed up blue galaxy in the Abell 2197 galaxy
cluster located in western Hercules. This is another one Sakib Rasool
pointed me to.

Redshift puts it 384 million light-years away with the Abell cluster
center about 35 million light-years further away. There are only two
notes at NED on the galaxy, one saying it has 5 clumps of HII and
another calling it a group of blue galaxies. Not much agreement here!
The SDSS lists it under several different galaxy designations but NED
has an Essential Note that says these are multiple entries that describe
the same object. Again little help. Looking at the SDSS data in NED
you find three clumps identified. One is within 2 seconds of arc of the
centroid position the UGC uses. The other two are shown on the
annotated image. I find it interesting that what appears to be the core
as it is more orange than the other parts as well as a detached south
west and a south to southeast part are not listed. If any are a
separate galaxy I'd think it the southwestern apparently detached part.
Why do I try and look these things up?

Being located on the edge of the Abell 2197 galaxy cluster there are a
lot of galaxies in the image. Like some other Hercules galaxy clusters
it has a higher proportion of disk galaxies than most. For the
annotated image if the galaxy was likely a member of the cluster I
identified it by catalog name as well as showing its redshift. Those
beyond the cluster are shown only by distance. Note that some of the
very distant (over 2 billion light-years distant) galaxies are larger in
angular size than many dwarf cluster members. Often the main way to
tell a distant one is that it is redder than close ones though that
isn't always true. There are some intensely blue distant galaxies in
the image.

It also contains quite a few UvES (Ultraviolet Excess Objects). This
are found photographically and are likely quasars. With only a
photographic redshift this isn't as accurate as spectroscopic
measurement. Only one proven quasar is in the image and it is very blue
and 11.1 billion light-years distant light travel time. It is up toward
the upper right corner of the image.

I've also included the Sloan Survey image of this oddball 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".