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Y. Uchiyama, C. M. Urry, J. Van Duyne (Yale University), C. C. Cheung (KIPAC), S. Jester (Fermilab), T. Takahashi (JAXA/ISAS), R. M. Sambruna (GSFC), F. Tavecchio, L. Maraschi (Oss. Astro. di Brera)
In recent years, relativistic jets extending hundreds of kpc from the quasar nucleus have been detected with Hubble and Chandra. However, the emission mechanism(s), particularly in the X-ray, responsible for the kpc-scale jets remains unsettled. To open yet another window to observe jet emissions, we have performed infrared imaging of four quasar jets with the Spitzer Space Telescope IRAC during the first observing cycle. In this paper, we present initial results for the quasars 3C 273 and PKS 0637-752, from both of which jet emissions in the mid-infrared regime (up to the 5.8 micron band) have been clearly detected. Our infrared observations bring new clues as to the origin of the broadband emission, and put a meaningful constraint on jet composition on large scales, which demonstrating the importance of exploring the infrared portion of jet emission.
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Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.