Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pasp...93..338c&link_type=abstract
Astronomical Society of the Pacific, Publications, vol. 93, June-July 1981, p. 338-343. Research supported by the National Rese
Astronomy and Astrophysics
Astronomy
4
Binary Stars, Infrared Stars, Light Curve, Stellar Spectra, Variable Stars, X Ray Sources, Astronomical Photometry, Color, Interstellar Matter, Radio Sources (Astronomy), Red Shift, Stellar Envelopes, Stellar Magnitude, Stellar Radiation, Stellar Temperature, Thermal Radiation
Scientific paper
Infrared monitoring of SS 433 from April 13, 1979 UT to April 17, 1979 UT inclusive at J, H, K, and L wavelengths demonstrated the variability of this source over time scales of days with tentative evidence of much shorter period fluctuations. These limited data show a substantially different pattern of variation to that expected from the inferred light curve of Giles et al. (1980), casting doubt upon the validity of this light curve as a representation of infrared variations, at least over the above time period. Color-index changes appear to be related to J intensity, the source becoming redder as the intensity decreases. The spectrum when corrected for interstellar reddening fits reasonably well to a blackbody curve, with a significant excess at L (3.5 microns) possibly indicating the existence of thermal emission from circumstellar material at a temperature below 1000 K.
Clark Thomas A.
Milone Eugene F.
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