FreeLists / az-observing / [AZ-Observing] Re: [sac-forum] FW: [ASKC] Article about Einstein Rings

["AJ Crayon" <acrayon@xxxxxxx>]

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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 -----=20
  From: Richard Harshaw=20
  To: sac-forum@xxxxxxxxxxxxx ; az-observing@xxxxxxxxxxxxx=20
  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!

  =20

  Dick Harshaw

  =20

  =20

  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

  =20

  this article details a phenomenon which is as significant as pulsars =
if=20
  it can be exploited. This chance occurance allows the possiblity of an =

  accurate mass measurement of a very distant galactic object. This is=20
  significant, because the measurement of luminosity and mass correlated =

  to that allows an measurement of distance from other than estimations=20
  that have been used before.

  Pulsars were important because they allowed stars to be measured for=20
  distance. By spotting pulsar type objects in nearby galazies the=20
  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=20
  than before.

  Just as a measure of how things have changed, I took an astrophysics=20
  class in 1974, and it was assumed that the redshift would not be =
nailed=20
  down due to a lack of such a discovery as this. It is amazing to see=20
  things that were thought to have been "impossible" actually fall into=20
  place, and advance things in this way.

  Jim

  =
http://science.slashdot.org/article.pl?sid=3D08/01/11/0039212&from=3Drss

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