No Access

EMISSION FROM LARGE-SCALE JETS IN QUASARS

YASUNOBU UCHIYAMA

Department of High Energy Astrophysics, ISAS/JAXA, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan

https://doi.org/10.1142/S0218271808013054Cited by:4 (Source: Crossref)

Abstract

We consider the emission processes in the large-scale jets of powerful quasars based on the results obtained with the VLA, Spitzer, Hubble, and Chandra. We show that two archetypal jets, 3C 273 and PKS 1136–135, have two distinct spectral components on large-scales: (1) the low-energy (LE) synchrotron spectrum extending from radio to infrared, and (2) the high-energy (HE) component arising from optical and extending to X-rays. The X-ray emission in quasar jets is often attributed to inverse-Compton scattering of cosmic microwave background (CMB) photons by radio-emitting electrons in a highly relativistic jet. However, recent data prefer synchrotron radiation by a second distinct electron population as the origin of the HE component. We anticipate that optical polarimetry with Hubble will establish the synchrotron nature of the HE component. Gamma-ray observations with GLAST (renamed as the Fermi Gamma-ray Space Telescope), as well as future TeV observations, are expected to place important constraints on the jet models.

Keywords:

You currently do not have access to the full text article.
Recommend the journal to your library today!

References

D. E. Harris and H. Krawczynski, Annu. Rev. Astron. Astrophys. 44, 463 (2006), DOI: 10.1146/annurev.astro.44.051905.092446. Web of Science, ADS, Google Scholar
G. Chartaset al., Astrophys. J. 542, 655 (2000), DOI: 10.1086/317049. Web of Science, ADS, Google Scholar
F. Tavecchioet al., Astrophys. J. Lett. 544, L23 (2000), DOI: 10.1086/317292. Web of Science, ADS, Google Scholar
A. Celotti, G. Ghisellini and M. Chiaberge, Mon. Not. R. Astron. Soc. 321, L1 (2001), DOI: 10.1046/j.1365-8711.2001.04160.x. Web of Science, Google Scholar
A. Atoyan and C. D. Dermer, Astrophys. J. 613, 151 (2004), DOI: 10.1086/422499. Web of Science, ADS, Google Scholar
F. A. Aharonian, Mon. Not. R. Astron. Soc. 332, 215 (2002), DOI: 10.1046/j.1365-8711.2002.05292.x. Web of Science, ADS, Google Scholar
Y. Uchiyamaet al., Astrophys. J. 648, 910 (2006), DOI: 10.1086/505964. Web of Science, ADS, Google Scholar
Y. Uchiyamaet al., Astrophys. J. 661, 719 (2007), DOI: 10.1086/518089. Web of Science, ADS, Google Scholar
S. Jesteret al., Mon. Not. R. Astron. Soc. 380, 828 (2007), DOI: 10.1111/j.1365-2966.2007.12120.x. Web of Science, ADS, Google Scholar
R. M. Sambrunaet al., Astrophys. J. 641, 717 (2006), DOI: 10.1086/500526. Web of Science, ADS, Google Scholar
M. Türleret al., Astron. Astrophys. Suppl. 134, 89 (1999). ADS, Google Scholar
S. Jesteret al., Astrophys. J. 648, 900 (2006), DOI: 10.1086/505962. Web of Science, ADS, Google Scholar
R. M. Sambrunaet al., Astrophys. J. 549, L161 (2001), DOI: 10.1086/319157. Web of Science, Google Scholar
F. Tavecchioet al., Astrophys. J. 641, 732 (2006), DOI: 10.1086/500536. Web of Science, ADS, Google Scholar
M. Georganopoulos and D. Kazanas, Astrophys. J. Lett. 604, L81 (2004), DOI: 10.1086/386339. Web of Science, ADS, Google Scholar
P. Grandi and G. G. C. Palumbo, Science 306, 998 (2004), DOI: 10.1126/science.1101787. Web of Science, ADS, Google Scholar
L. Stawarz and M. Ostrowski, Astrophys. J. 578, 763 (2002), DOI: 10.1086/342649. Web of Science, Google Scholar
M. Georganopouloset al., Astrophys. J. Lett. 653, 5 (2006), DOI: 10.1086/510452. Web of Science, ADS, Google Scholar
R. C. Thomson, C. D. Mackay and A. E. Wright, Nature 365, 133 (1993), DOI: 10.1038/365133a0. Web of Science, ADS, Google Scholar