A re-analysis of the spectrum of 2206-199

Other

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Absorption Spectra, Doppler Effect, Lyman Spectra, High Resolution, Line Of Sight, Quasars

Scientific paper

Recently Pettini, Hunstead, Smith and Mar, (PHSM 1991) performed an analysis of the Ly-alpha forest of QSO 2206-199N at very high resolution. On the basis of their observations they concluded that most Doppler parameters b = (square root of 2)(sigma) of Ly-alpha forest lines are below 22 km/s, with a range down to a few km/s and a median of 17 km/s. They also found a strong intrinsic correlation between Doppler parameter b and column density N. These results are in contrast to those of a similar study by Carswell, Lanzetta, Parnell, and Webb (CLPW 1991) at comparable resolution with the same instruments, who find that most of the Ly-alpha lines towards QSO 1100-264 have Doppler parameters above 15 km/s (median b = 34 km/s), and that there is no significant correlation between b and N. Whilst an intrinsic difference between the lines of sight to 2206-199 and to other QSO's can not be excluded a priori, previous disagreement between Doppler parameter estimates obtained by both groups pointed to a potential difference in estimation techniques and in the interpretation of the results. To investigate this possibility, the AAT/UCLES spectrum of 2206-199 obtained by PHSM were reanalyzed. The spectrum was extracted from the raw data and determined the line parameters using the method described by CLPW.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

A re-analysis of the spectrum of 2206-199 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 A re-analysis of the spectrum of 2206-199, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A re-analysis of the spectrum of 2206-199 will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-1259610

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.