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ASTRO: NGC 5107 and 5122
NGC 5107 and 5112 are a pair of non interacting galaxies. Red shift
puts them at about 55 million light years. Tully-Fisher measurements of 5107 range from 45 to 76 million light-years while those for NGC 5112 cover an even wider range of 59 to 101 million light-years. While that makes it possible they aren't at all close to each other I have to think their similar redshift is no coincidence and they are a related pair. NGC 5107 is classed as SB(s)d? by NED and SBcd by the NGC project. The question mark indicates some uncertainty about the wide arm (d) classification. It certainly is hard to tell from our perspective. It has some interesting knots in the arms northwest of the core that are brighter than the galaxy's core. I'd love to see this one more face on. NGC 5112 is seen nearly face on. It's arm structure is rather disorganized. NED classes it as SB(rs)cd while the NGC project say SBc. Even face on there is some debate over the c or d classification of the arm structure. NGC 5107 seems to be cited (at least by the dubious email I get) as having a "companion" quasar that is almost exactly on its minor axis. There is a quasar that projected in two dimensions could be said to fit this but since this is at least a 3 dimensional universe, probably more, there's no way to show this is actually the case. Nor does the page show why this would be significant even if it was the case. If they are saying it supports anomalous redshift then they have to assume anomalous redshift applies here, otherwise its not on the minor axis. But that's what they want to support in the first place. Circular reasoning gets me dizzy. Also they seem to tell me (some are really confusing to read) that this somehow vindicates Arp's anomalistic redshift ideas. Most referred me to this webpage. http://arijmaki.wordpress.com/2011/0...at-minor-axis/ Note the page doesn't say how this proves or supports anything. Nor any of the other "relationships" they find. I thought the humongous amount of evidence against such ideas would kill them but like most pseudoscience the concept of anomalous red shift won't succumb to facts. All other quasars and galaxies in the image apparently are ignored by these folks as well. My inbox should be smoking after this! There are several galaxy clusters in this image. Interestingly three of them are at about 4.5 billion light-years and are clustered. What! The anomalous redshift folks find nothing of interest in this! It must prove something. I'm not going to bore you with details. If you want the details drop me a note and I'll be happy to go into the details. If the redshift for both galaxy and cluster is exactly the same or virtually the same I give only one figure. When not given a ? for the is used. All redshift has been converted to "light travel time" distances using NED's 5 year WMAP calculations. That is the time the light has taken to reach us since it left the object. The object was closer when the light was emitted and is currently further away. The universe's expansion all those billions of years causes the light to have to travel longer and further than it would have in a static universe. In that time the object has been carried much further away. In fact for those with a very high redshift they are currently so distant the light they emit "today" will never reach us as they are being carried away at a speed greater than the speed of light. 14" LX200R @ f/10, L=6x10' RB=3x10'x3 G=2x10'x3, STL-11000XM, Paramount ME Rick -- Prefix is correct. Domain is arvig dot net |
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