The existence of broad absorption line (BAL) outflows in only radio-quiet QSOs was thought to be an important clue to mass ejection and the radio-loud-radio-quiet dichotomy. Recently, a few radio-loud BAL QSOs have been discovered at high redshift. We present evidence that PKS 1004+13 is a radio-loud BAL QSO. It would be the first known at low redshift (zem = 0.24) and one of the most radio-luminous. For PKS 1004+13, there appear to be broad absorption troughs of O VI, N V, Si IV, and C IV, indicating high-ionization outflows up to ∼10,000 km s-1. There are also two strong, broad (∼550 km s-1), high-ionization associated absorption systems that show partial covering of the continuum source. The strong UV absorption we have detected suggests that the extreme, soft X-ray weakness of PKS 1004+13 is primarily the result of absorption. The large radio-lobe dominance indicates BAL and associated gas at high inclinations to the central engine axis, perhaps in a line of sight that passes through an accretion disk wind.
All Science Journal Classification (ASJC) codes
- Astronomy and Astrophysics
- Space and Planetary Science