Search for alpha variation in UVES spectra: Analysis of C IV and Si IV doublets towards QSO 1101-264

Simple item page
dc.creatorFiorenzano, A. F. Martinez
dc.creatorVladilo, G.
dc.creatorBonifacio, P.
dc.date2003-12-10
dc.date2004-07-21
dc.date.accessioned2026-07-07T02:11:31Z
dc.date.available2026-07-07T02:11:31Z
dc.descriptionMotivated 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).
dc.description4 pages, 3 figures; Poster Paper presented at the XLVII Meeting of the Italian Astronomical Society. Download the poster with 6 figures from the proceedings web site at http://sait.oat.ts.astro.it/MSAIS/3/POST/MartinezF_poster.pdf
dc.identifierhttps://arxiv.org/abs/astro-ph/0312270
dc.identifierhttp://arxiv.org/abs/astro-ph/0312270
dc.identifierMemorie della Societa' Astronomica Italiana - Supplementi Vol. 3 (2003) p. 252
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/7117
dc.subjectAstrophysics
dc.titleSearch for alpha variation in UVES spectra: Analysis of C IV and Si IV doublets towards QSO 1101-264
dc.typetext

Files

Collections

arXiv