Time variations of narrow absorption lines in high resolution quasar spectra
نویسندگان
چکیده
منابع مشابه
A high - velocity narrow absorption line outflow in the quasar
We report on the discovery of a high-velocity narrow absorption line outflow in the redshift 2.3 quasar J212329.46 − 005052.9. Five distinct outflow systems are detected with velocity shifts from −9710 to −14 050 km s−1 and C IV λλ1548, 1551 linewidths of FWHM ≈ 62– 164 km s−1. This outflow is remarkable for having high speeds and a degree of ionization similar to broad absorption line (BAL) fl...
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متن کاملLimits on variations in fundamental constants from 21-cm and ultraviolet Quasar absorption lines.
Quasar absorption spectra at 21-cm and UV rest wavelengths are used to estimate the time variation of x [triple-bond] alpha(2)g(p)mu, where alpha is the fine structure constant, g(p) the proton g factor, and m(e)/m(p) [triple-bond] mu the electron/proton mass ratio. Over a redshift range 0.24 < or = zeta(abs) < or = 2.04, (Deltax/x)(weighted)(total) = (1.17 +/- 1.01) x 10(-5). A linear fit give...
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ژورنال
عنوان ژورنال: Astronomy & Astrophysics
سال: 2015
ISSN: 0004-6361,1432-0746
DOI: 10.1051/0004-6361/201526289