The IR energy distribution of SS433

Details The IR energy distribution of SS433 The IR energy distribution of SS433

Dec 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979natur.282..810w&link_type=abstract

Nature, vol. 282, Dec. 20-27, 1979, p. 810-811.

Astronomy and Astrophysics

Astronomy

12

Energy Spectra, Infrared Spectra, Radio Sources (Astronomy), Variable Stars, X Ray Sources, Electron Density (Concentration), Emission Spectra, Photometry, Spectrum Analysis

Scientific paper

The infrared energy distribution of the emission-line object SS 433 in the range 1 to 10 microns is determined. Photometric measurements were made with a 2.2-m telescope using an InSb detector and a 6-arcsec diaphragm for 1.2- to 4.8-micron observations and a gallium-doped germanium bolometer with a 6-arcsec diaphragm for 8- to 13-micron observations. Results indicate the presence of substantial night-to-night flux density and color variations, and a decrease in flux density at wavelengths greater than 5 microns. The energy cut-off is used to estimate a physical size of 1 AU for the emitting region and an electron density of 10 to the 11th/cu cm on the basis of a model of reddened free-free emission from an ionized plasma, with self-absorption of radiation over 5 microns. The greater variability observed at longer wavelengths is also interpreted in terms of this model.

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