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Thread: filling in a quasar sampling gap

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    Default filling in a quasar sampling gap



    chas53, pikaia, helicon64 and 3 others like this.

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    Default Re: filling in a quasar sampling gap

    Thanks n-FA. But I do not know how far away is a quasar at redshift range of 5.3 ≤ z ≤ 5.7. Thanks
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    Default Re: filling in a quasar sampling gap


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    Default Re: filling in a quasar sampling gap

    Thanks n-FA. That is a cool site. I saved it. It calculated between 72 an 78 MLY.
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    Default Re: filling in a quasar sampling gap

    Ah, not sure that calculator is doing the maths right.
    The result given is 72-78 Gly, and I don't think that's correct. Not even for its 'current' distance.

    ETA the hyperphysics website calculator gives it as about 13.29 - 13.39 Mly.
    http://hyperphysics.phy-astr.gsu.edu...hubble.html#c3
    Last edited by Gfamily; 04-13-2017 at 05:45 PM.
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    Default Re: filling in a quasar sampling gap

    Thanks. I went to that site and you are correct. Did you do the calculations on the other site? Did they turn out like I said or did I do something wrong?
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    Default Re: filling in a quasar sampling gap

    Quote Originally Posted by michael131313 View Post
    Thanks. I went to that site and you are correct. Did you do the calculations on the other site? Did they turn out like I said or did I do something wrong?
    I don't think you did anything wrong other than misread the 'billions' as 'millions'; but in terms of the numbers, i think they may have used the non relativistic​ version of the red shift formula.
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    Default Re: filling in a quasar sampling gap

    Thanks for your help. I like your site better because it worked for me. By the way, I thought it might be billions, but that made no sense to me!!
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    Default Re: filling in a quasar sampling gap

    Sorry for the lame link. It appealed because of the many odd units but is apparently using a bad formula. Thanks to Gfamily for the better link.
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