ASTRO: Arp 177, Arp 302 and a whole lot more

Another two-fer image. I'll start with Arp 177 since it is near the
center of the image. At the time I didn't realize Arp 302 was also in
the field or I'd have moved the field to get them both better centered.
These galaxies are in Bootes.

Arp 177/MCG +04-35-016 and MCG +04-35-17 fall in Arp's class; Galaxies
with narrow counter tails. Arp's comment reads: "Very small plume comes
off companion galaxy opposite larger." It appears the blue plume to the
north northwest coming from MCG +04-35-016 is the "very small plume"
while the large diffuse plume to the east of MCG +04-35-17 refers to the
"opposite larger" part of the comment. The western galaxy with its
plume reminds me of a comet. Redshift data is only available for the
western (-16) comet like member. That puts it at about 460
million-light years. I found very little on this pair. NED made no
attempt to classify either galaxy.

Arp 302/UGC 09618a and b (b is the north member) is in Arp's category
for double galaxies. Arp had no comment on this pair. They appear to
be barely interacting. Some star plumes seem to be starting as there is
a halo of stars around both galaxies. The northern member is a
starburst galaxy. It's not necessary for an interaction to start a
starburst but it certainly helps! This pair is also about 460 million
light-years distant so both of these are part of the same local group of
galaxies. NED classes the northern one as Sb with strong HII emission
and a LINER spectrum. Signs of a disturbed galaxy. Problem is the
southern member is rather normal though its spiral arms are a bit
kinked. It is classed as Sc. I've attached a Hubble image of this pair.

There is very little information on this area. Sloan shows about 3000
galaxies in the area but has little on any of them. The only other
galaxy with any redshift data is the edge on galaxy north of Arp 177.
It is UGC 09606 and is in the flat galaxy catalog as FGC 1828. Seems to
have too big of a core to make that catalog. Apparently not. A faint
hint of a dust lane can be seen crossing the core area but I couldn't
pull it out of the disk. It is classed Sbc by NED with a red shift that
puts it much closer at 230 million light-years.

North northwest of Arp 302 is a small, very orange galaxy surrounded by
a lot of faint galaxies as well as some much closer galaxies. One of
the close ones is a very blue spiral with a orange edge on disk galaxy
to its right. The orange galaxy I'm referring to is the distant
elliptical galaxy almost due east (left) of the blue spiral. It anchors
the galaxy cluster NSC J145649+244122. NED shows it as richness class 2
(I can't translate that) with a distance of 1.5 billion light years.
The galaxy is SDSS J145651.46+244203.5. There's no redshift given but
since it is considered to anchor the cluster its safe to assume the same
distance. The blue spiral is MAPS-NGP O_383_0185334. That's the only
catalog entry NED has for it. It is not in the Sloan catalog though the
western most point of its faint arm is listed in NED as a separate
galaxy. Looks like a bright knot to me. The orange spindle is MAPS-NGP
O_383_0185301. Again, it's not in Sloan either. The rest of the field
is just as frustrating.

Sorry about my stars. Somehow I managed to turn off PEC and since I
don't guide the result is rather imperfect stars. I need to redo this
one and get round stars. Maybe that's why the dust lane in the flat
galaxy is so hard to detect.

Arp's image of #177
http://ned.ipac.caltech.edu/level5/A...ig_arp177.jpeg

Arp's image of #302
http://ned.ipac.caltech.edu/level5/A...ig_arp302.jpeg

14" LX200R @ f/10, L=6x10 RGB=2x10x3, 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 Johnson" wrote in message
ster.com...

Another two-fer image. I'll start with Arp 177 since it is near the
center of the image. At the time I didn't realize Arp 302 was also in
the field or I'd have moved the field to get them both better centered.
These galaxies are in Bootes.

Arp 177/MCG +04-35-016 and MCG +04-35-17 fall in Arp's class; Galaxies
with narrow counter tails. Arp's comment reads: "Very small plume comes
off companion galaxy opposite larger." It appears the blue plume to the
north northwest coming from MCG +04-35-016 is the "very small plume"
while the large diffuse plume to the east of MCG +04-35-17 refers to the
"opposite larger" part of the comment. The western galaxy with its
plume reminds me of a comet. Redshift data is only available for the
western (-16) comet like member. That puts it at about 460
million-light years. I found very little on this pair. NED made no
attempt to classify either galaxy.

Arp 302/UGC 09618a and b (b is the north member) is in Arp's category
for double galaxies. Arp had no comment on this pair. They appear to
be barely interacting. Some star plumes seem to be starting as there is
a halo of stars around both galaxies. The northern member is a
starburst galaxy. It's not necessary for an interaction to start a
starburst but it certainly helps! This pair is also about 460 million
light-years distant so both of these are part of the same local group of
galaxies. NED classes the northern one as Sb with strong HII emission
and a LINER spectrum. Signs of a disturbed galaxy. Problem is the
southern member is rather normal though its spiral arms are a bit
kinked. It is classed as Sc. I've attached a Hubble image of this pair.

There is very little information on this area. Sloan shows about 3000
galaxies in the area but has little on any of them. The only other
galaxy with any redshift data is the edge on galaxy north of Arp 177.
It is UGC 09606 and is in the flat galaxy catalog as FGC 1828. Seems to
have too big of a core to make that catalog. Apparently not. A faint
hint of a dust lane can be seen crossing the core area but I couldn't
pull it out of the disk. It is classed Sbc by NED with a red shift that
puts it much closer at 230 million light-years.

North northwest of Arp 302 is a small, very orange galaxy surrounded by
a lot of faint galaxies as well as some much closer galaxies. One of
the close ones is a very blue spiral with a orange edge on disk galaxy
to its right. The orange galaxy I'm referring to is the distant
elliptical galaxy almost due east (left) of the blue spiral. It anchors
the galaxy cluster NSC J145649+244122. NED shows it as richness class 2
(I can't translate that) with a distance of 1.5 billion light years.
The galaxy is SDSS J145651.46+244203.5. There's no redshift given but
since it is considered to anchor the cluster its safe to assume the same
distance. The blue spiral is MAPS-NGP O_383_0185334. That's the only
catalog entry NED has for it. It is not in the Sloan catalog though the
western most point of its faint arm is listed in NED as a separate
galaxy. Looks like a bright knot to me. The orange spindle is MAPS-NGP
O_383_0185301. Again, it's not in Sloan either. The rest of the field
is just as frustrating.

Sorry about my stars. Somehow I managed to turn off PEC and since I
don't guide the result is rather imperfect stars. I need to redo this
one and get round stars. Maybe that's why the dust lane in the flat
galaxy is so hard to detect.

Arp's image of #177
http://ned.ipac.caltech.edu/level5/A...ig_arp177.jpeg

Arp's image of #302
http://ned.ipac.caltech.edu/level5/A...ig_arp302.jpeg

14" LX200R @ f/10, L=6x10 RGB=2x10x3, STL-11000XM, Paramount ME

Rick
--
Awesome image, Rick.

George