Astronomy and Astrophysics – Astrophysics
Scientific paper
2003-12-10
Memorie della Societa' Astronomica Italiana - Supplementi Vol. 3 (2003) p. 252
Astronomy and Astrophysics
Astrophysics
4 pages, 3 figures; Poster Paper presented at the XLVII Meeting of the Italian Astronomical Society. Download the poster with
Scientific paper
Motivated by previous studies of QSO spectra that reported a variation of the fine structure constant alpha, a search for C IV and Si IV doublets was conducted in the absorption spectrum toward QSO 1101-264, obtained by VLT-UVES during the Science Verification. Seven C IV and two Si IV systems were identified and accurate measurements of wavelengths over the redshift range 1.1862 < z < 1.8377 were performed. After a careful selection of pairs of lines, the "Alkali Doublet" method with a derived analitical expression for the error analysis was applied to compute the alpha variation. The result according in magnitud order with previous doublets measurements, corresponds to one Si IV system: Delta alpha/alpha = (- 3.09 +/- 8.46) x 10^(-5).
Bonifacio Piercarlo
Martinez Fiorenzano A. F.
Vladilo Gg.
No associations
LandOfFree
Search for alpha variation in UVES spectra: Analysis of C IV and Si IV doublets towards QSO 1101-264 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 Search for alpha variation in UVES spectra: Analysis of C IV and Si IV doublets towards QSO 1101-264, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Search for alpha variation in UVES spectra: Analysis of C IV and Si IV doublets towards QSO 1101-264 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-460347