Near-infrared photometry of the jet of 3C 273.

Details Near-infrared photometry of the jet of 3C 273. Near-infrared photometry of the jet of 3C 273.

Oct 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997a%26a...326...69n&link_type=abstract

Astronomy and Astrophysics, v.326, p.69-76

Astronomy and Astrophysics

Astrophysics

13

Quasars: Individual: 3C 273, Galaxies: Jets, Infrared: Galaxies

Scientific paper

A deep infrared observation of the quasar 3C 273 and its jet is presented. The K' image (λ=2.1μm) resolves the jet into single knots and for the first time detects the infrared counterpart to the radio hot spot. On the basis of the K' flux densities derived for these components the run of the radio to IR and IR to optical spectral indices along the jet axis is discussed. Along the main body of the jet the spectral indices can be understood in terms of a constant shape of the synchrotron spectrum that is dominated by a power-law with a high frequency cut-off. The K' map detects IR counterparts to the extended radio emissions surrounding the knots and the hot spot indicating the presence of high energetic particles well aside the bright synchrotron components.

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