X-Ray Absorption Associated with High-Velocity UV Absorbers
نویسندگان
چکیده
We present Chandra observations of two radio-quiet QSOs, PG 2302+029 and PG 1254+047. PG2302+029 has an ultra high-velocity UV absorption system (∼ −56, 000 km s), while PG 1254+047 is a Broad Absorption Line (BAL) QSO with detached troughs. Both objects are X-ray weak, consistent with the known correlation between αox and the strength of the UV absorption lines. The data suggest that there is evidence that both objects are intrinsically weak X-ray sources, in addition to being heavily X-ray absorbed. The X-ray absorption column densities are NH > 10 22 cm for neutral gas and the intrinsic emission spectra have αox > 2. The data are fit best by including ionized (rather than neutral) absorbers, with column densities N H > 2.98 × 10 cm and N H > 17.3 × 10 cm. The degrees of ionization are consistent with the UV lines, as are the total column densities if the strongest lines are saturated.
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