A cosmic rest frarne at high redshift

Details A cosmic rest frarne at high redshift A cosmic rest frarne at high redshift

Nov 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994mnras.271...13r&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Vol. 271, 13

Astronomy and Astrophysics

Astronomy

3

Scientific paper

We discuss a method to detect or put upper limits on our motion relative to a rest frame provided by point sources at high red shift, and we apply the technique to real and artificial redshift surveys of intergalactic gas clouds (Lyman a absorption systems). The redshift regime that can be sampled this way extends from z 0 (UV observations) right up to the redshifts of the most distant QSO (z 5 at present). The detection of our motion with respect to this high-z frame is based on the directiondependent changes in the number of objects per redshift interval, as induced by the Doppler effect. The presently available data samples (not optimal for our purpose) enable us to establish an upper limit vlc <0.05 for the motion of the Solar system relative to the Ly a forest at mean redshift (z) =2.9. Key words: quasars: absorption lines - quasars: general - cosmology: observations.

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