Orientation VS. Evolution from a Unique BALQSO

Details Orientation VS. Evolution from a Unique BALQSO Orientation VS. Evolution from a Unique BALQSO

Sep 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001cxo..prop..930g&link_type=abstract

Chandra Proposal ID #03700333

Computer Science

Chandra Proposal Id #03700333

Scientific paper

We propose deep ACIS-S imaging spectroscopy of the brightest Broad Absorption Line (BAL) QSO from our Chandra AO1 snapshot survey. BALs are caused by highly ionized outflows from the quasar nucleus with velocities commonly reaching 0.1c. The ionization of their X-ray warm absorbers has never been constrained, but directly affects best estimates of their possibly huge kinetic luminosities. BALQSOs may exist in every quasar when seen at the proper orientation, or they may represent an early or high L/LEdd phase of quasar evolution. High S/N hard X-ray spectra have proven difficult to obtain from bona fide BALQSOs, but UM425 provides the best opportunity yet to test the competing models and provide crucial insight into conditions near the nucleus.

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