X-ray absorption and an X-ray jet in the radio-loud broad absorption-line quasar PG 1004+130

B. P. Miller, W. N. Brandt, S. C. Gallagher, A. Laor, B. J. Wills, G. P. Garmire, D. P. Schneider

Research output: Contribution to journalArticle

29 Citations (Scopus)

Abstract

We investigate the X-ray properties of PG 1004+130, a radio-loud broad absorption-line (BAL) quasar with a hybrid FR I/II radio morphology. This optically bright, low-redshift quasar was undetected by Einstein, marking it as anomalously X-ray weak relative to other radio-loud quasars. The 22.2 ks XMM-Newton and 41.6 ks Chandra observations presented here are the first X-ray detections of PG 1004+130 and constitute the highest spectral quality X-ray observations of a radio-loud BAL quasar available to date. The Chandra ACIS-S spectrum shows evidence for complex soft X-ray absorption not detected in the data obtained 1.7 yr previously with XMM-Newton, with a best-fit intrinsic column density of NH = 1.2 × 1022 cm-2 for the preferred partial-covering model. There is no significant difference in the hard-band power-law photon index of Γ ≈ 1.5 between the two observations. The Chandra image also reveals extended X-ray emission ≈8″ (30 kpc) southeast of the nucleus, aligned with the FR I jet but upstream of the 1.4 GHz radio brightness peak. The j et is not detected by HST, and the optical upper limit rules out a simple single-component synchrotron interpretation of the radio-to-X-ray emission. The multiwavelength characteristics of the PG 1004+130 jet, including its relatively flat X-ray power law and concave spectral energy distribution, are similar to those of powerful FR II jets. The lack of strong beaming in PG 1004+130 limits the efficiency of inverse Compton upscattering, and we consider the X-ray emission to most likely arise from a second synchrotron component generated by highly energetic electrons.

Original languageEnglish (US)
Pages (from-to)163-176
Number of pages14
JournalAstrophysical Journal
Volume652
Issue number1 I
DOIs
StatePublished - Nov 20 2006

Fingerprint

quasars
radio
x rays
XMM-Newton telescope
newton
synchrotrons
power law
spectral energy distribution
upstream
marking
brightness
coverings
energetics
electron
nuclei
photons
energy

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Miller, B. P. ; Brandt, W. N. ; Gallagher, S. C. ; Laor, A. ; Wills, B. J. ; Garmire, G. P. ; Schneider, D. P. / X-ray absorption and an X-ray jet in the radio-loud broad absorption-line quasar PG 1004+130. In: Astrophysical Journal. 2006 ; Vol. 652, No. 1 I. pp. 163-176.
@article{d14ac345b9eb45b88fd6cae5dcdacc99,
title = "X-ray absorption and an X-ray jet in the radio-loud broad absorption-line quasar PG 1004+130",
abstract = "We investigate the X-ray properties of PG 1004+130, a radio-loud broad absorption-line (BAL) quasar with a hybrid FR I/II radio morphology. This optically bright, low-redshift quasar was undetected by Einstein, marking it as anomalously X-ray weak relative to other radio-loud quasars. The 22.2 ks XMM-Newton and 41.6 ks Chandra observations presented here are the first X-ray detections of PG 1004+130 and constitute the highest spectral quality X-ray observations of a radio-loud BAL quasar available to date. The Chandra ACIS-S spectrum shows evidence for complex soft X-ray absorption not detected in the data obtained 1.7 yr previously with XMM-Newton, with a best-fit intrinsic column density of NH = 1.2 × 1022 cm-2 for the preferred partial-covering model. There is no significant difference in the hard-band power-law photon index of Γ ≈ 1.5 between the two observations. The Chandra image also reveals extended X-ray emission ≈8″ (30 kpc) southeast of the nucleus, aligned with the FR I jet but upstream of the 1.4 GHz radio brightness peak. The j et is not detected by HST, and the optical upper limit rules out a simple single-component synchrotron interpretation of the radio-to-X-ray emission. The multiwavelength characteristics of the PG 1004+130 jet, including its relatively flat X-ray power law and concave spectral energy distribution, are similar to those of powerful FR II jets. The lack of strong beaming in PG 1004+130 limits the efficiency of inverse Compton upscattering, and we consider the X-ray emission to most likely arise from a second synchrotron component generated by highly energetic electrons.",
author = "Miller, {B. P.} and Brandt, {W. N.} and Gallagher, {S. C.} and A. Laor and Wills, {B. J.} and Garmire, {G. P.} and Schneider, {D. P.}",
year = "2006",
month = "11",
day = "20",
doi = "10.1086/507509",
language = "English (US)",
volume = "652",
pages = "163--176",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "1 I",

}

X-ray absorption and an X-ray jet in the radio-loud broad absorption-line quasar PG 1004+130. / Miller, B. P.; Brandt, W. N.; Gallagher, S. C.; Laor, A.; Wills, B. J.; Garmire, G. P.; Schneider, D. P.

In: Astrophysical Journal, Vol. 652, No. 1 I, 20.11.2006, p. 163-176.

Research output: Contribution to journalArticle

TY - JOUR

T1 - X-ray absorption and an X-ray jet in the radio-loud broad absorption-line quasar PG 1004+130

AU - Miller, B. P.

AU - Brandt, W. N.

AU - Gallagher, S. C.

AU - Laor, A.

AU - Wills, B. J.

AU - Garmire, G. P.

AU - Schneider, D. P.

PY - 2006/11/20

Y1 - 2006/11/20

N2 - We investigate the X-ray properties of PG 1004+130, a radio-loud broad absorption-line (BAL) quasar with a hybrid FR I/II radio morphology. This optically bright, low-redshift quasar was undetected by Einstein, marking it as anomalously X-ray weak relative to other radio-loud quasars. The 22.2 ks XMM-Newton and 41.6 ks Chandra observations presented here are the first X-ray detections of PG 1004+130 and constitute the highest spectral quality X-ray observations of a radio-loud BAL quasar available to date. The Chandra ACIS-S spectrum shows evidence for complex soft X-ray absorption not detected in the data obtained 1.7 yr previously with XMM-Newton, with a best-fit intrinsic column density of NH = 1.2 × 1022 cm-2 for the preferred partial-covering model. There is no significant difference in the hard-band power-law photon index of Γ ≈ 1.5 between the two observations. The Chandra image also reveals extended X-ray emission ≈8″ (30 kpc) southeast of the nucleus, aligned with the FR I jet but upstream of the 1.4 GHz radio brightness peak. The j et is not detected by HST, and the optical upper limit rules out a simple single-component synchrotron interpretation of the radio-to-X-ray emission. The multiwavelength characteristics of the PG 1004+130 jet, including its relatively flat X-ray power law and concave spectral energy distribution, are similar to those of powerful FR II jets. The lack of strong beaming in PG 1004+130 limits the efficiency of inverse Compton upscattering, and we consider the X-ray emission to most likely arise from a second synchrotron component generated by highly energetic electrons.

AB - We investigate the X-ray properties of PG 1004+130, a radio-loud broad absorption-line (BAL) quasar with a hybrid FR I/II radio morphology. This optically bright, low-redshift quasar was undetected by Einstein, marking it as anomalously X-ray weak relative to other radio-loud quasars. The 22.2 ks XMM-Newton and 41.6 ks Chandra observations presented here are the first X-ray detections of PG 1004+130 and constitute the highest spectral quality X-ray observations of a radio-loud BAL quasar available to date. The Chandra ACIS-S spectrum shows evidence for complex soft X-ray absorption not detected in the data obtained 1.7 yr previously with XMM-Newton, with a best-fit intrinsic column density of NH = 1.2 × 1022 cm-2 for the preferred partial-covering model. There is no significant difference in the hard-band power-law photon index of Γ ≈ 1.5 between the two observations. The Chandra image also reveals extended X-ray emission ≈8″ (30 kpc) southeast of the nucleus, aligned with the FR I jet but upstream of the 1.4 GHz radio brightness peak. The j et is not detected by HST, and the optical upper limit rules out a simple single-component synchrotron interpretation of the radio-to-X-ray emission. The multiwavelength characteristics of the PG 1004+130 jet, including its relatively flat X-ray power law and concave spectral energy distribution, are similar to those of powerful FR II jets. The lack of strong beaming in PG 1004+130 limits the efficiency of inverse Compton upscattering, and we consider the X-ray emission to most likely arise from a second synchrotron component generated by highly energetic electrons.

UR - http://www.scopus.com/inward/record.url?scp=33845337596&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33845337596&partnerID=8YFLogxK

U2 - 10.1086/507509

DO - 10.1086/507509

M3 - Article

AN - SCOPUS:33845337596

VL - 652

SP - 163

EP - 176

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 1 I

ER -