[sac-forum] Re: FW: [ASKC] Article about Einstein Rings

Dick, some time back Dr. Burstine, from ASU, indicated something like this was 
unique.  Naturally becasue it is the only know example of it kind.  Guess we 
will have to wait and see if it becomes an everday happening.  Still a very 
interesting discovery.

Thanks,
aj

  ----- Original Message ----- 
  From: Richard Harshaw 
  To: sac-forum@xxxxxxxxxxxxx ; az-observing@xxxxxxxxxxxxx 
  Sent: Saturday, January 12, 2008 6:46 AM
  Subject: [sac-forum] FW: [ASKC] Article about Einstein Rings


  Got this note and link from a colleague in Kansas City. Interesting!

   

  Dick Harshaw

   

   

  From: ASKC@xxxxxxxxxxxxxxx [mailto:ASKC@xxxxxxxxxxxxxxx] On Behalf Of jim s
  Sent: Saturday, January 12, 2008 1:04 AM
  To: ASKC@xxxxxxxxxxxxxxx
  Subject: [ASKC] Article about Einstein Rings

   

  this article details a phenomenon which is as significant as pulsars if 
  it can be exploited. This chance occurance allows the possiblity of an 
  accurate mass measurement of a very distant galactic object. This is 
  significant, because the measurement of luminosity and mass correlated 
  to that allows an measurement of distance from other than estimations 
  that have been used before.

  Pulsars were important because they allowed stars to be measured for 
  distance. By spotting pulsar type objects in nearby galazies the 
  distances to those objects could be measured. At some distance the use 
  of red shift to distance was used, but of course is and was imprecise.

  This may allow an object with a very large red shift to be massed, and 
  the proper luminosity measured, pushing that measure out much deeper 
  than before.

  Just as a measure of how things have changed, I took an astrophysics 
  class in 1974, and it was assumed that the redshift would not be nailed 
  down due to a lack of such a discovery as this. It is amazing to see 
  things that were thought to have been "impossible" actually fall into 
  place, and advance things in this way.

  Jim

  http://science.slashdot.org/article.pl?sid=08/01/11/0039212&from=rss

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