PG 1254+047: An Intrinsically X-Ray Weak, Heavily Absorbed Broad Absorption Line Quasar?

Details PG 1254+047: An Intrinsically X-Ray Weak, Heavily Absorbed Broad Absorption Line Quasar? PG 1254+047: An Intrinsically X-Ray Weak, Heavily Absorbed Broad Absorption Line Quasar?

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001apj...563..555s&link_type=abstract

The Astrophysical Journal, Volume 563, Issue 2, pp. 555-559.

Astronomy and Astrophysics

Astronomy

22

Galaxies: Active, Galaxies: Quasars: Absorption Lines, Galaxies: Quasars: Individual: Alphanumeric: Pg 1254+047, X-Rays: Galaxies

Scientific paper

We present Chandra observations of the radio-quiet broad absorption line (BAL) quasar PG 1254+047. We find that it is a weak X-ray source, with a total of 44+/-7 photons measured in 36 ks across the observed energy range 0.7-6.0 keV. Its X-ray weakness is consistent with the known correlation between αox and the strength of the UV absorption lines. The spectral energy distribution suggests that PG 1254+047 is intrinsically X-ray weak, in addition to being heavily X-ray absorbed. The X-ray absorption column density is NH>1023 cm-2 for neutral gas, while the intrinsic (unabsorbed) emission spectrum has αox>2. The data are best fit by including an ionized (rather than neutral) absorber with column density NH>~2×1023 cm-2. The degree of ionization is consistent with the UV BALs, as is the total column density if the strongest UV lines are saturated. If the X-ray absorber forms in a wind that is radiatively accelerated to the BAL velocities, then the wind must be launched from a radius of about 1016 cm with a mass-loss rate of ~1Q Msolar yr-1.

Affiliated with

Also associated with

No associations

Rating

PG 1254+047: An Intrinsically X-Ray Weak, Heavily Absorbed Broad Absorption Line Quasar? does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with PG 1254+047: An Intrinsically X-Ray Weak, Heavily Absorbed Broad Absorption Line Quasar?, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and PG 1254+047: An Intrinsically X-Ray Weak, Heavily Absorbed Broad Absorption Line Quasar? will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1387938