Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-08-07
Mon.Not.Roy.Astron.Soc.347:355,2004
Astronomy and Astrophysics
Astrophysics
18 pages, 9 PS figures, 6 tables. Note that the k-values of the 1D flux power spectrum had been erroneously shifted by half a
Scientific paper
10.1111/j.1365-2966.2004.07221.x
The flux power spectra of the Lyman-alpha forest from a sample of 27 QSOs taken with the high resolution echelle spectrograph UVES on VLT are presented. We find a similar fluctuation amplitude at the peak of the ``3D'' flux power spectrum at k ~ 0.03 (km/sec)^(-1) as the study by Croft et al. (2002), in the same redshift range. The amplitude of the flux power spectrum increases with decreasing redshift if corrected for the increase in the mean flux level as expected if the evolution of the flux power spectrum is sensitive to the gravitational growth of matter density fluctuations. This is in agreement with the findings of McDonald et al. (2000) at larger redshift. The logarithmic slope of the "3D" flux power spectrum, P_F(k), at large scales k < 0.03 (km/sec)^(-1), is 1.4 +- 0.3, i.e. 0.3 shallower than that found by Croft et al. (2002) but consistent within the errors.
Carswell Robert F.
Cristiani Stefano
Haehnelt Martin G.
Kim Tae Seong
Viel Matteo
No associations
LandOfFree
The power spectrum of the flux distribution in the Lyman-alpha forest of a Large sample of UVES QSO Absorption Spectra (LUQAS) does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with The power spectrum of the flux distribution in the Lyman-alpha forest of a Large sample of UVES QSO Absorption Spectra (LUQAS), we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The power spectrum of the flux distribution in the Lyman-alpha forest of a Large sample of UVES QSO Absorption Spectra (LUQAS) will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-4352