Cosmology

Re: Has this Puzzle been solved?

Star Dragon — Wed, 06 May 2009 03:51:00 GMT

HI Chip,

Thanks for responding, I have made a few queries into this puzzle when I came across this statement that refutes lensing and that the quasar is in fact contained in the galaxy,

If the source (quasar) is very far away, then in order to produce strong gravitational lensing, one needs a surface density larger than,

A nearby face-on spiral, unless it's extremely massive, won't be able to produce this, so it won't produce multiple-image gravitational lensing. There will be weak lensing effects in the source, but unlike with galaxy sources, a quasar point-source image won't be distorted by it.

The Galaxy is too opaque at the quasar's position to allow background light through.

I also found this, http://arxiv.org/abs/astro-ph/0409215

Ok the further I dig, the more confusing this becomes, there are many different papers with different conclusions,

Here is another one, ~~http://creation.com/bye-bye-big-bang~~, I am not trying to persuade anyone against the BBT, I actually accept it, although with many questions, still there seems to be contention and the matter is not solved, can you point me to other papers?

Edit: strike my last link out, it has to do with creationism and they cite a religious quote, thats a No No in my book you can't mix both.

I find this rather disturbing, According to Harp, it is interacting with NGC 7913, and not lensed or seen through a hole.

I have not been able to find any papers that conclude that there is a massive jet from this quasar far away that is interacting with NGC7913

Edit: I imaged this galaxy with my meager equipment with poor results Stephans Quintet

Dennis

Re: Has this Puzzle been solved?

chipdatajeffB — Wed, 06 May 2009 01:57:41 GMT

I think if you dig around via Google you'll find refereed papers showing that the quasar is much more distant than the galaxy and that the galaxy is emitting X rays where the jet from the quasar intersects it, throwing off the redshift calculations greatly.

If memory serves, once the Chandra orbiting X-ray observatory came online, several Seyfert galaxy puzzles like this one began to fall by the wayside. The news is that this interaction between jets and intervening galaxies had not been expected, at least the extent of the interaction was unexpected.

This particular galaxy is one of the "real" trio among what we normally call Stephan's Quintet (the other two primary galaxies being at much different distances and, therefore, not gravitationally interacting). There is a lot of interesting stuff happening in this region.

Has this Puzzle been solved?

Star Dragon — Wed, 06 May 2009 01:34:24 GMT

Hi folks,

I ran across this article in the Science daily that was written back in 2005, it shows something that casts doubt on the redshift interpretations.

Does anyone here have any further data on this anomaly?

Since the article is approximately 4 yrs old, surely by now, someone may just have cracked this riddle.

http://www.sciencedaily.com/releases/2005/01/050111115201.htm

Dennis