Bulg. J. Phys. vol.34 no.s2 (2007), pp. 275-277
Tracing Quasar Accretion Rates at Higher Redshifts
R.S. Bachev
Institute of Astronomy, Bulgarian Academy of Sciences, Sofia 1784, Bulgaria
go backInstitute of Astronomy, Bulgarian Academy of Sciences, Sofia 1784, Bulgaria
Abstract. In this work we connect some measurable properties of the CIVλ1549 emission line with the quasar accretion rates (Eddington ratios). A tight correlation is found for a sample of more than a hundred nearby objects, suggesting a possible method for a relatively accurate estimate of the Eddington ratio of high-redshift quasars, at least for the radio-quiet ones. This paper further confirms the existing notion that the CIV changes (shifts) are mostly driven by the accretion rate.

