SIMBAD references

2002ApJ...573L..77H - Astrophys. J., 573, L77-L80 (2002/July-2)

Discovery of an ionized Fe K edge in the z=3.91 broad absorption line quasar APM 08279+5255 with XMM-newton.


Abstract (from CDS):

Recent XMM-Newton observations of the high-redshift, lensed, broad absorption line (BAL) quasi-stellar object APM 08279+5255, one of the most luminous objects in the universe, allowed the detection of a high column density absorber (NH~1023 cm–2) in the form of a K-shell absorption edge of significantly ionized iron (Fe XV-Fe XVIII) and corresponding ionized lower energy absorption. Our findings confirm a basic prediction of phenomenological geometry models for the BAL outflow and can constrain the size of the absorbing region. The Fe/O abundance of the absorbing material is significantly higher than solar (Fe/O=2-5), giving interesting constraints on the gas enrichment history in the early universe.

Abstract Copyright:

Journal keyword(s): Galaxies: Quasars: Absorption Lines - Galaxies: Quasars: Individual: Alphanumeric: APM 08279+5255 - X-Rays: Galaxies

Simbad objects: 3

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