On why the Iron K-shell absorption in AGN is not a signature of the local Warm/Hot Intergalactic Medium

Details On why the Iron K-shell absorption in AGN is not a signature of the local Warm/Hot Intergalactic Medium On why the Iron K-shell absorption in AGN is not a signature of the local Warm/Hot Intergalactic Medium

2008-01-10

arxiv.org/abs/0801.1587v1

Astronomy and Astrophysics

Astrophysics

accepted for publication in MNRAS LETTERS. 5 pages, 4 figures

Scientific paper

10.1111/j.1745-3933.2008.00443.x

We present a comparison between the 2001 XMM-Newton and 2005 Suzaku observations of the quasar, PG1211+143 at z=0.0809. Variability is observed in the 7 keV iron K-shell absorption line (at 7.6 keV in the quasar frame), which is significantly weaker in 2005 than during the 2001 XMM-Newton observation. From a recombination timescale of <4 years, this implies an absorber density n>0.004 particles/cm3, while the absorber column is 5e22

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