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2013MNRAS.431.2885M - Mon. Not. R. Astron. Soc., 431, 2885-2906 (2013/May-3)
HST/COS observations of a new population of associated QSO absorbers.
MUZAHID S., SRIANAND R., ARAV N., SAVAGE B.D. and NARAYANAN A.
Abstract (from CDS):
The column density ratios of highly ionized species (i.e. Ovi, Neviii, Mgx, etc.) show a very narrow spread. Moreover, the measured N(Ne VIII)/N(O VI) ratio in the associated absorbers is similar to what is seen in the intervening absorbers. All these suggest a narrow range of ionization parameter in the case of PI or a narrow temperature range (i.e. T ∼ 105.9±0.1 K) in the case of CIE models. The present data do not distinguish between these two alternatives. However, detection of absorption line variability with repeat HST/COS observations will allow us to (i) distinguish between these alternatives, (ii) establish the location of the absorbing gas and (iii) understand the mechanism that provides stability to the multiphase medium. These are important for understanding the contribution of associated Neviii absorbers to the AGN feedback.
Abstract Copyright: © 2013 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2013)
Journal keyword(s): galaxies: active - quasars: absorption lines - quasars: general
CDS comments: Figure 3: HS 1102+3411 is a misprint for HS 1102+3441.
Simbad objects: 27
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