HS 1603+3820 and its Warm Absorber

Details HS 1603+3820 and its Warm Absorber HS 1603+3820 and its Warm Absorber

Jul 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009mavo.proc..185n&link_type=abstract

Multi-wavelength Astronomy and Virtual Observatory, Proceedings of the EURO-VO Workshop, held at the European Space Astronomy Ce

Astronomy and Astrophysics

Astronomy

Virtual Observatory

Scientific paper

We use photoionization codes CLOUDY and TITAN to obtain physical conditions in the absorbing medium close to the nucleus of a distant quasar (z = 2.54) HS 1603+3820. We found that the total column density of this Warm Absorber is 2 x 1022 cm-2. Due to the softness of the quasars spectrum the modelling allowed us also to determine uniquely the volume hydrogen density of this warm gas (n = 1010 cm-3) which combined with the other quasar parameters leads to a distance determination to the Warm Absorber from the central source which is ~ 1.5 x 1016 cm.

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