Arp 80 Lots of galaxies in IFN
Posted 28 December 2012 - 04:24 PM
It does, however, have a companion. It is LEDA 213530 about 3 minutes to the south and a bit east. Far from being on an arm it is apparently a true companion having exactly the same redshift, 2160 km/s. NED classes it as Im. It is quite blue as are a surprising number of the galaxies in this image.
Below it is yet another companion NGC 2634. It is classed by NED as E1: and simply as E by the NGC Project. Usually elliptical galaxies are composed of old red stars but this one has outer shells of blue. The POSS plates also show it brighter in blue than red light. Continuing south yet we find yet another group member, NGC 2634A. NED classes it as SB(s)bc? sp. The sp means it has spectral lines. It is apparently an edge on barred spiral. It certainly has some bright knots of activity in it. The shells of NGC 2634 are usually an indication it is digesting a rather large meal after cannibalizing another galaxy in the past. I find its shells more interesting than Arp 80. Arp has a class for such shell galaxies but didn't include this one though to me its shells structure is better defined than some he did include. All notes at NED agree it is not interacting with NGC 2634A.
Those 4 are the only ones with any redshift data but there are other interesting galaxies in the image that I marked in the annotated image. MAILYAN 035 is a very low surface brightness, and very fuzzy spiral galaxy that is also very blue. The designation is from the Mailyan Dwarf Galaxy Catalogue. So apparently it is a small galaxy much closer than the previously mentioned galaxies. Though without redshift data this is only a guess.
Every object NED lists in the field has been annotated. Most with a ? for distance. A few that would seem reasonable for NED to know about aren't listed. Probably because those that are are either from the 2MASS catalog of 2 micron objects which omits galaxies without 2 micron radiation which usually means lots of warm dust, or they are objects with strong ultraviolet radiation. These are noted by UvES. Often these are quasar candidates though they can be just stars with unusual UV radiation and even galaxies. One that is certainly a galaxy is at the top of the image left of center. The others are star-like but without redshift data I can't tell if they might be quasar candidates or not.
The entire field is full of IFN, galactic cirrus. Unfortunately my color data is somewhat noisy do to clouds so it looks rather noisy. This image was taken over a couple nights but still was severely hurt by clouds. This is my last January 2012 image. Weather allowed me to capture only 5 objects that month and most of those were taken under far from ideal skies. February wasn't any better nor was most of the year. It isn't ending any better than it began.
14" LX200R @ f/10, L=8x10' R=4x10' G=3x10' B=2x10', STL-11000XM, Paramount ME
Full frame at native 1" per pixel
Posted 28 December 2012 - 07:32 PM
Happy New Year
Posted 29 December 2012 - 06:07 PM
I had to google Gravol. It's Dramamine on on this side of the border.
I have an inner ear problem due to being too close to a big explosion at about age 8 that damaged the balance organ in my right ear (and nearly deafened that ear) so often need it though this field didn't do that to me.
Posted 29 December 2012 - 07:26 PM
It is a marvelous field. It's also a pretty reasonable view of the IFN.