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ASTRO: Arp 142 Porpoise or Penguin?
Arp 142 is two interacting galaxies in Hydra just west of its border
with Sextans and south of Leo. Arp classed it as: "Elliptical and Elliptical-like Galaxies: Material emanating from Elliptical Galaxies". I really don't see what Arp was talking about other than there is a rather extended halo around the elliptical on the east to north side. The elliptical is NGC 2937 while the irregular galaxy (might have been a spiral before the encounter) is NGC 2936. They are located about 330 light years away so are both rather large galaxies. Irregular galaxies are usually not very big. Often elliptical galaxies are very large but they don't have to be. I've seen NGC 2936 called the Porpoise Galaxy by those on the Galaxy Zoo forum. To me it looks more like a penguin with a bright blue light in its mouth. To the upper right of it, hiding behind a rather bright star is another galaxy that is very blue. I can find virtually nothing on it other than a designation of "UGC 0530 notes 01" by NED. UGC 0530 is NGC 2936. Is it involved? Quite likely but I can't find enough to determine this. To the lower left (SE) of NGC 2937 is a very small galaxy, SDSS J093747.25+024409.4, which has a redshift distance of 347 million light years and thus likely part of the same group but not necessarily involved in the interaction. There are many distant galaxies in this image, most don't have red shift distances. Also I found 7 quasars in this image. I've made an annotated image showing the distances to both in billions of light years. Galaxies are noted by a G before the distance. Quasars only by their distance. The asteroid to the south west of Arp 142 is (90802) 1994 WY at magnitude 18.1. An image of this guy by from the Sloan Deep Sky Survey with colors from photometric filters rather than RGB filters so color is rather weird. http://casjobs.sdss.org/ImgCutoutDR7...12&opt=&query= Arp's image with the 200" scope taken on a very good night (far better than mine) is at: http://nedwww.ipac.caltech.edu/level...ig_arp142.jpeg 14" LX200R @ f/10, L-4x10' RGB=2x10', 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". |
#2
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ASTRO: Arp 142 Porpoise or Penguin?
I vote for Flipper, Rick!
that a cool target "Rick Johnson" wrote in message ter.com... Arp 142 is two interacting galaxies in Hydra just west of its border with Sextans and south of Leo. Arp classed it as: "Elliptical and Elliptical-like Galaxies: Material emanating from Elliptical Galaxies". I really don't see what Arp was talking about other than there is a rather extended halo around the elliptical on the east to north side. The elliptical is NGC 2937 while the irregular galaxy (might have been a spiral before the encounter) is NGC 2936. They are located about 330 light years away so are both rather large galaxies. Irregular galaxies are usually not very big. Often elliptical galaxies are very large but they don't have to be. I've seen NGC 2936 called the Porpoise Galaxy by those on the Galaxy Zoo forum. To me it looks more like a penguin with a bright blue light in its mouth. To the upper right of it, hiding behind a rather bright star is another galaxy that is very blue. I can find virtually nothing on it other than a designation of "UGC 0530 notes 01" by NED. UGC 0530 is NGC 2936. Is it involved? Quite likely but I can't find enough to determine this. To the lower left (SE) of NGC 2937 is a very small galaxy, SDSS J093747.25+024409.4, which has a redshift distance of 347 million light years and thus likely part of the same group but not necessarily involved in the interaction. There are many distant galaxies in this image, most don't have red shift distances. Also I found 7 quasars in this image. I've made an annotated image showing the distances to both in billions of light years. Galaxies are noted by a G before the distance. Quasars only by their distance. The asteroid to the south west of Arp 142 is (90802) 1994 WY at magnitude 18.1. An image of this guy by from the Sloan Deep Sky Survey with colors from photometric filters rather than RGB filters so color is rather weird. http://casjobs.sdss.org/ImgCutoutDR7...12&opt=&query= Arp's image with the 200" scope taken on a very good night (far better than mine) is at: http://nedwww.ipac.caltech.edu/level...ig_arp142.jpeg 14" LX200R @ f/10, L-4x10' RGB=2x10', 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". |
#3
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ASTRO: Arp 142 Porpoise or Penguin?
I've since had the suggestion it is an "Arp" seal pup!
Dang, I should have thought of that. 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". |
#4
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ASTRO: Arp 142 Porpoise or Penguin?
"Rick Johnson" wrote in message ter.com... I've since had the suggestion it is an "Arp" seal pup! That's hilarious, Rick! |
#5
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ASTRO: Arp 142 Porpoise or Penguin?
Rick,
very good image of this pair. To me the blue galaxy a bit to the upper right of the main objects looks a bit like a jet, maybe that's what Arp meant with "emanating material". Stefan "Rick Johnson" schrieb im Newsbeitrag ter.com... Arp 142 is two interacting galaxies in Hydra just west of its border with Sextans and south of Leo. Arp classed it as: "Elliptical and Elliptical-like Galaxies: Material emanating from Elliptical Galaxies". I really don't see what Arp was talking about other than there is a rather extended halo around the elliptical on the east to north side. The elliptical is NGC 2937 while the irregular galaxy (might have been a spiral before the encounter) is NGC 2936. They are located about 330 light years away so are both rather large galaxies. Irregular galaxies are usually not very big. Often elliptical galaxies are very large but they don't have to be. I've seen NGC 2936 called the Porpoise Galaxy by those on the Galaxy Zoo forum. To me it looks more like a penguin with a bright blue light in its mouth. To the upper right of it, hiding behind a rather bright star is another galaxy that is very blue. I can find virtually nothing on it other than a designation of "UGC 0530 notes 01" by NED. UGC 0530 is NGC 2936. Is it involved? Quite likely but I can't find enough to determine this. To the lower left (SE) of NGC 2937 is a very small galaxy, SDSS J093747.25+024409.4, which has a redshift distance of 347 million light years and thus likely part of the same group but not necessarily involved in the interaction. There are many distant galaxies in this image, most don't have red shift distances. Also I found 7 quasars in this image. I've made an annotated image showing the distances to both in billions of light years. Galaxies are noted by a G before the distance. Quasars only by their distance. The asteroid to the south west of Arp 142 is (90802) 1994 WY at magnitude 18.1. An image of this guy by from the Sloan Deep Sky Survey with colors from photometric filters rather than RGB filters so color is rather weird. http://casjobs.sdss.org/ImgCutoutDR7...12&opt=&query= Arp's image with the 200" scope taken on a very good night (far better than mine) is at: http://nedwww.ipac.caltech.edu/level...ig_arp142.jpeg 14" LX200R @ f/10, L-4x10' RGB=2x10', 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". |
#6
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ASTRO: Arp 142 Porpoise or Penguin?
Possible but it looks pretty much like a typical galaxy in Arp's photo.
My lousy seeing does give it more the look of something odd. The bright star certainly doesn't help any to see what it is. It's on the reshoot list when seeing is better. That likely won't happen for a while. Rick Stefan Lilge wrote: Rick, very good image of this pair. To me the blue galaxy a bit to the upper right of the main objects looks a bit like a jet, maybe that's what Arp meant with "emanating material". Stefan "Rick Johnson" schrieb im Newsbeitrag ter.com... Arp 142 is two interacting galaxies in Hydra just west of its border with Sextans and south of Leo. Arp classed it as: "Elliptical and Elliptical-like Galaxies: Material emanating from Elliptical Galaxies". I really don't see what Arp was talking about other than there is a rather extended halo around the elliptical on the east to north side. The elliptical is NGC 2937 while the irregular galaxy (might have been a spiral before the encounter) is NGC 2936. They are located about 330 light years away so are both rather large galaxies. Irregular galaxies are usually not very big. Often elliptical galaxies are very large but they don't have to be. I've seen NGC 2936 called the Porpoise Galaxy by those on the Galaxy Zoo forum. To me it looks more like a penguin with a bright blue light in its mouth. To the upper right of it, hiding behind a rather bright star is another galaxy that is very blue. I can find virtually nothing on it other than a designation of "UGC 0530 notes 01" by NED. UGC 0530 is NGC 2936. Is it involved? Quite likely but I can't find enough to determine this. To the lower left (SE) of NGC 2937 is a very small galaxy, SDSS J093747.25+024409.4, which has a redshift distance of 347 million light years and thus likely part of the same group but not necessarily involved in the interaction. There are many distant galaxies in this image, most don't have red shift distances. Also I found 7 quasars in this image. I've made an annotated image showing the distances to both in billions of light years. Galaxies are noted by a G before the distance. Quasars only by their distance. The asteroid to the south west of Arp 142 is (90802) 1994 WY at magnitude 18.1. An image of this guy by from the Sloan Deep Sky Survey with colors from photometric filters rather than RGB filters so color is rather weird. http://casjobs.sdss.org/ImgCutoutDR7...12&opt=&query= Arp's image with the 200" scope taken on a very good night (far better than mine) is at: http://nedwww.ipac.caltech.edu/level...ig_arp142.jpeg 14" LX200R @ f/10, L-4x10' RGB=2x10', 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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