Chandra Detection of X-ray Absorption Associated with a Damped Ly-alpha Absorption System

Details Chandra Detection of X-ray Absorption Associated with a Damped Ly-alpha Absorption System Chandra Detection of X-ray Absorption Associated with a Damped Ly-alpha Absorption System

Oct 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000head....5.0220b&link_type=abstract

American Astronomical Society, HEAD Meeting #5, #02.20; Bulletin of the American Astronomical Society, Vol. 32, p.1185

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Scientific paper

We have observed three quasars, PKS 1127-143, Q 1331+171 and Q 0054+144, with ACIS aboard the Chandra X-ray Observatory, in order to measure soft X-ray absorption associated with intervening 21-cm and damped Ly-alpha absorbers. For PKS 1127-143, we detect absorption which, if associated with the intervening z(abs)=0.312 absorber, implies a metallicity of 1/5 solar. The advantage of the X-ray measurement is that the derived metallicity is insensitive to ionization, inclusion of an atom in a molecule, or depletion onto dust grains. The X-ray absorption is mostly due to oxygen, and agrees with the oxygen abundance of 16-40 percent solar derived from nebular emission lines in a foreground galaxy at the redshift of the absorber. The observations of the other two absorbers will also be presented.

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