TY - JOUR
T1 - PKS 1004+13
T2 - A high-inclination, highly absorbed radio-loud QSO - The first radio-loud broad absorption line QSO at low redshift?
AU - Wills, Beverley J.
AU - Brandt, W. N.
AU - Laor, A.
N1 - Funding Information:
We thank Michael Brotherton for valuable discussions, Nahum Arav for supplying the data for PG 0946+301, Yoji Kondo and Willem Wamsteker for help in arranging the IUE observations, and Cathy Imhoff and Randy Thompson for patient answering of IUE questions. This research is supported by NASA through LTSA grants NAG5-3431 (B. J. W.) and NAG5-8107 (W. N. B.), and has made use of the NASA/IPAC Extragalactic Database (NED), which is operated by the Jet Propulsion Laboratory, Caltech, under contract with NASA.
Funding Information:
1Based on observations by the International Ultraviolet Explorer (IUE) satellite, collected at the Villafranca Satellite Tracking Station of the European Space Agency, and on data from IUE and the NASA/ESA Hubble Space Telescope (HST), retrieved from the Multimission Archive at the Space Telescope Science Institute (MAST). STScI is operated by the Association of Universities for Research in Astronomy, Inc., under NASA contract NAS5-26555. Support for MAST for non-HST data is provided by the NASA Office of Space Science via grant NAG5-7584 and by other grants and contracts.
PY - 1999/8/1
Y1 - 1999/8/1
N2 - 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.
AB - 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.
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U2 - 10.1086/312165
DO - 10.1086/312165
M3 - Article
AN - SCOPUS:0033408690
SN - 0004-637X
VL - 520
SP - L91-L94
JO - Astrophysical Journal
JF - Astrophysical Journal
IS - 2 PART 2
ER -