Recent progress on the BAL QSOs research from X-ray observations.

Details Recent progress on the BAL QSOs research from X-ray observations. Recent progress on the BAL QSOs research from X-ray observations.

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ppmto..18..248w&link_type=abstract

Publ. Purple Mt. Obs., Vol. 18, No. 3, p. 248 - 253

Computer Science

Quasars: Absorption Lines, Quasars: X Rays

Scientific paper

The authors summarize results from recent X-ray observations on the BAL QSOs. The results clearly demonstrated that the absorbing column densities are three order of magnitude higher than previous estimations based on the UV absorption lines. The authors found a scattered or leaked unabsorbed soft X-ray component, in addition to a heavily absorbed power-law component at hard X-ray band, in PG 1411+442. The fraction of scattering or leakage is coincident with that of residuals in the UV absorption line troughs. This illustrates that the UV absorption trough actually is black-saturated. In addition, detailed analysis of UV and X-ray absorption in PG 1126-041 highlights that there is a continuous transition from the BAL phenomenon in QSOs to the intrinsic absorption lines in Seyfert galaxies.

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