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From: wls@astrovax.UUCP (William L. Sebok)
Newsgroups: net.astro.expert
Subject: Re: quasars and the history of the universe
Message-ID: <351@astrovax.UUCP>
Date: Sat, 19-May-84 22:52:50 EDT
Article-I.D.: astrovax.351
Posted: Sat May 19 22:52:50 1984
Date-Received: Mon, 21-May-84 03:24:12 EDT
References: <350@astrovax.UUCP>, <338@kpnoa.UUCP>
Organization: Princeton Univ. Astrophysics
Lines: 21

>> For example, quasars are distributed isotropically around the sky while
>>  pulsars are observed to be concentrated into the plane of our galaxy.
>> Bill Sebok

>I cannot let this go without one quick comment.  Known quasars are definitely
>NOT distributed uniformly around the sky, and there is a big debate about the
>causes of this.  Even on the most conservative view, quasars are clustered to
>each other.  The articles by Seldner&Peebles, by Nieto&Seldner, and by Bacon
>&Nieto and references therein are essential reading. I can give full references
>if needed, but at the moment it is not possible to say other than that quasar
>searches have not yet been uniform over the sky.  Whether there is something
>other than selection effects involved must be a moot point.
>-- Nigel Sharp

Sorry,  in the heat of the moment I forgot to phrase what I said carefully and
use the proper hedge-words.  I am aware that quasars are clustered to each
other.  A weaker statement is that there is no evidence (that I am aware of
anyway) that quasars prefer to be found in the plane of our own galaxy.
-- 
Bill Sebok			Princeton University, Astrophysics
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