Multifrequency observations of the red QSO 1413 + 135

Details Multifrequency observations of the red QSO 1413 + 135 Multifrequency observations of the red QSO 1413 + 135

Oct 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981natur.293..714b&link_type=abstract

Nature, vol. 293, Oct. 29, 1981, p. 714-717. NSF-supported research.

Astronomy and Astrophysics

Astronomy

72

Astronomical Spectroscopy, Galactic Radiation, Infrared Spectra, Quasars, Radio Frequencies, Compton Effect, Electron Distribution, Magnetic Fields, Polarized Radiation, Spectral Energy Distribution, Spectroscopic Telescopes, Synchrotron Radiation, X Ray Spectra

Scientific paper

The extremely red QSO 1413 + 135 shows characteristics typical of BL Lac objects: it has no emission lines, is embedded in a luminous galaxy, is subject to rapid radio and IR variability, has an inverted radio spectrum, and shows substantial IR polarization. The rapid steepening of the nonthermal spectrum at less than 5 microns is interpreted as synchrotron emission from an electron distribution that ends sharply at some maximum energy. The X-ray emission is probably inverse Compton radiation. It is calculated that the optically thin emitting region is compact, has a large magnetic field and exhibits bulk relativistic motion towards the observer. The most energetic electrons in the emitting region have a Lorentz factor of 100 to 1000.

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