The parsec-scale jet of PKS 0637-752

Philip G. Edwards, B. Glenn Piner, Steven J. Tingay, James E J Lovell, Jun Kataoka, Roopesh Ojha, Yasuhiro Murata

研究成果: Article

6 引用 (Scopus)

抄録

Chandra observations of the quasar PKS 0637-752 during its checkout phase resulted in the unexpected detection of a luminous kiloparsec-scale X-ray jet. The apparent superluminal speed of this jet on the parsec-scale, based on two VSOP and four ground-based observations, has proven crucial to understanding the X-ray production in the arcsec-scale jet. We present here for the first time the full details of the ground-based observations used to determine the parsec-scale jet speed, describe the results of a third VSOP observation, and examine the reported jet speed in the light of more recent ground-based VLBI observations. We find some evidence of increased source activity coincident with extrapolated epochs of jet component ejection, although the monitoring of the source is relatively sparse and the ejection epochs are not tightly constrained. We also construct the spectral energy distribution for the nucleus of PKS 0637-752 and show that it can be modelled well in terms of a one-zone synchrotron self-Compton model of an electron-positron jet with a Doppler factor of ∼ 10, consistent with the results of the VLBI observations.

元の言語English
ページ(範囲)233-241
ページ数9
ジャーナルPublications of the Astronomical Society of Japan
58
発行部数2
出版物ステータスPublished - 2006
外部発表Yes

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very long base interferometry
very long baseline interferometry
ejection
time measurement
checkout
spectral energy distribution
quasars
positrons
synchrotrons
x rays
electron
nuclei
monitoring
energy
speed
electrons
detection
distribution

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

これを引用

Edwards, P. G., Piner, B. G., Tingay, S. J., Lovell, J. E. J., Kataoka, J., Ojha, R., & Murata, Y. (2006). The parsec-scale jet of PKS 0637-752. Publications of the Astronomical Society of Japan, 58(2), 233-241.

The parsec-scale jet of PKS 0637-752. / Edwards, Philip G.; Piner, B. Glenn; Tingay, Steven J.; Lovell, James E J; Kataoka, Jun; Ojha, Roopesh; Murata, Yasuhiro.

:: Publications of the Astronomical Society of Japan, 巻 58, 番号 2, 2006, p. 233-241.

研究成果: Article

Edwards, PG, Piner, BG, Tingay, SJ, Lovell, JEJ, Kataoka, J, Ojha, R & Murata, Y 2006, 'The parsec-scale jet of PKS 0637-752', Publications of the Astronomical Society of Japan, 巻. 58, 番号 2, pp. 233-241.
Edwards PG, Piner BG, Tingay SJ, Lovell JEJ, Kataoka J, Ojha R その他. The parsec-scale jet of PKS 0637-752. Publications of the Astronomical Society of Japan. 2006;58(2):233-241.
Edwards, Philip G. ; Piner, B. Glenn ; Tingay, Steven J. ; Lovell, James E J ; Kataoka, Jun ; Ojha, Roopesh ; Murata, Yasuhiro. / The parsec-scale jet of PKS 0637-752. :: Publications of the Astronomical Society of Japan. 2006 ; 巻 58, 番号 2. pp. 233-241.
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T1 - The parsec-scale jet of PKS 0637-752

AU - Edwards, Philip G.

AU - Piner, B. Glenn

AU - Tingay, Steven J.

AU - Lovell, James E J

AU - Kataoka, Jun

AU - Ojha, Roopesh

AU - Murata, Yasuhiro

PY - 2006

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N2 - Chandra observations of the quasar PKS 0637-752 during its checkout phase resulted in the unexpected detection of a luminous kiloparsec-scale X-ray jet. The apparent superluminal speed of this jet on the parsec-scale, based on two VSOP and four ground-based observations, has proven crucial to understanding the X-ray production in the arcsec-scale jet. We present here for the first time the full details of the ground-based observations used to determine the parsec-scale jet speed, describe the results of a third VSOP observation, and examine the reported jet speed in the light of more recent ground-based VLBI observations. We find some evidence of increased source activity coincident with extrapolated epochs of jet component ejection, although the monitoring of the source is relatively sparse and the ejection epochs are not tightly constrained. We also construct the spectral energy distribution for the nucleus of PKS 0637-752 and show that it can be modelled well in terms of a one-zone synchrotron self-Compton model of an electron-positron jet with a Doppler factor of ∼ 10, consistent with the results of the VLBI observations.

AB - Chandra observations of the quasar PKS 0637-752 during its checkout phase resulted in the unexpected detection of a luminous kiloparsec-scale X-ray jet. The apparent superluminal speed of this jet on the parsec-scale, based on two VSOP and four ground-based observations, has proven crucial to understanding the X-ray production in the arcsec-scale jet. We present here for the first time the full details of the ground-based observations used to determine the parsec-scale jet speed, describe the results of a third VSOP observation, and examine the reported jet speed in the light of more recent ground-based VLBI observations. We find some evidence of increased source activity coincident with extrapolated epochs of jet component ejection, although the monitoring of the source is relatively sparse and the ejection epochs are not tightly constrained. We also construct the spectral energy distribution for the nucleus of PKS 0637-752 and show that it can be modelled well in terms of a one-zone synchrotron self-Compton model of an electron-positron jet with a Doppler factor of ∼ 10, consistent with the results of the VLBI observations.

KW - Galaxies: quasars: individual (PKS 0637-752)

KW - Radio continuum: galaxies

KW - Techniques: interferometric

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