Abrupt cutoffs in the optical-infrared spectra of nonthermal sources

Details Abrupt cutoffs in the optical-infrared spectra of nonthermal sources Abrupt cutoffs in the optical-infrared spectra of nonthermal sources

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982apj...263...73r&link_type=abstract

Astrophysical Journal, Part 1, vol. 263, Dec. 1, 1982, p. 73-78. NSF-supported research.

Astronomy and Astrophysics

Astronomy

63

Astronomical Photometry, Infrared Astronomy, Nonthermal Radiation, Quasars, Radio Sources (Astronomy), Infrared Photometry, Infrared Spectra, Red Shift, Visible Spectrum

Scientific paper

Optical and infrared photometry is reported for a number of radio sources with very faint and red optical identifications. Three types of object are indicated for the sample: highly redshifted galaxies with approximately normal colors; sources subjected to strong Galactic reddening; and violently variable sources with very sharp intrinsic spectral cutoffs toward higher frequencies. The spectra of the latter class cut off nearly as abruptly as is theoretically possible for synchrotron emission.

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