Re: High Z QSO ques


"Steve Willner" <willner@xxxxxxxxxxxxxxx> wrote in message news:ftm292$2ut$2@xxxxxxxxxxxxxxxxxxxxxxxxxxxx
In article <ftjpir$5fc$1@xxxxxxxxxxxxxxxxxxxxxxxxx>,
"WG" <wgilmour@xxxxxxxxxx> writes:
I'm looking for an example of a high Z (>2) QSO whose distance =
has been determined by another method other than the redshift?

I don't think you are going to find one. QSOs are far from being
"standard candles."

I believe Type Ia QSOs would be the candidates since they can be fitted =
to a luminosity Curve.

Are you thinking of Type 1a supernovae? They make good standard
candles. I'm not sure what the record redshift is these days, but
I'm fairly sure it's rather less than 2. There are "Type 1" QSOs --
those with broad emission lines -- but I've never heard of "Type 1a,"
and as noted above, no QSOs are standard candles.


Yep that's it. I was confused. Thanks ...I know what to look for now.
.