Abstract
The radio source 1413 + 135 is shown to be one of the strongest known emitters of millimetre radiation. The energy distribution of this object measured between metre and X-ray wavelengths reveals that most of the power emitted by this object comes out at millimetre and far-IR wavelengths. If the emission at 1 mm is due to incoherent synchrotron radiation, then the source must be very compact, with a size around 25 µ arc s, and contain a magnetic field larger than 10 G. The steep spectral index in the near-IR is attributed to a high-energy cutoff in the distribution of synchrotron emitting electrons at a Lorentz factor γ ∼ 300.
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Beichman, C., Neugebauer, G., Soifer, B. et al. Compact radio source 1413 + 135 is a far-IR extragalactic object. Nature 293, 711–713 (1981). https://doi.org/10.1038/293711a0
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DOI: https://doi.org/10.1038/293711a0
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