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View Full Version : VII ZW 941 One Arp failed to include in his Atlas of odd peculiar galaxies



RickJ
2012-Sep-25, 11:00 PM
VII Zw 941 is another one Arp missed. It would fit with his category for spirals with high surface brightness companions on the arm except that arm is mostly missing. So it might also fit his one armed spiral category. It is located in Cepheus 1.6 degrees west of NGC 188. Both are very red as are the other galaxies in the image. There is some blue extinction at this galactic latitude but not enough to account for all these red galaxies. Apparently they just are red. The CGPG catalog note on this galaxy pair says: "...red pair of Sc (galaxies) with compact core and spherical compact." NED doesn't attempt to classify either. The main one does appear Sc with a compact core but I'm not sure about the companion. Hard to tell if that's its fuzz around it or remains of the missing spiral arm of the brighter galaxy. In any case the pair is listed at a redshift that puts them about a half billion light years distant. NED has no redshift data for any other galaxy in the field, not even the companion. NED shows a correct position for the main galaxy and for the companion but it also lists a third entry with nothing at that position. Since the only note they have is identical in all three I assume it is referring to this pair. But I can't make any sense out of the third entry.

No other galaxy in the image has any distance data. Therefore I've not prepared an annotated image.

The field, being near the pole, is enveloped in the IFN associated with the pole area. My exposures weren't long enough to really bring it out but it is responsible for all the faint nebulosity in the field.

The blue glow at bottom right is due to a star that was giving me fits. I moved the field low thinking I'd moved it out of the field far enough but it managed to get its glow into the image anyway. Might as well left it in the image.

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

Rick