Publication Abstracts
Cameron 1966
Cameron, A.G.W., 1966: X-ray emission from old novae. Nature, 212, no. 5061, 493-494, doi:10.1038/212493a0.
The strong X-ray source in Scorpius has been identified with a very blue stellar object which has many of the characteristics of an old nova. The object varies irregularly by up to half an astronomical magnitude from day to day, but the average brightness appears to have been essentially the same for the past 70 years. Superimposed on these variations is a fast flicker with a time scale of the order of a minute or so. The X-ray spectrum is rather complex; if the X-rays are assumed to result from thin-source bremsstrahlung, then the 1-10 Å X-rays correspond to a temperature of about 5$times107 °K, but the range from 44 to 60 Å contains additional radiation which must come from a region of lower temperature. The visible radiation probably comes predominantly from the same thin-source bremsstrahlung, although hydrogen emission lines and helium, carbon, nitrogen, and oxygen absorption lines appear superposed on the continuum. Three orders of magnitude more energy is emitted as X-radiation than as visible light.
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BibTeX Citation
@article{ca02920g,
author={Cameron, A. G. W.},
title={X-ray emission from old novae},
year={1966},
journal={Nature},
volume={212},
number={5061},
pages={493--494},
doi={10.1038/212493a0},
}
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RIS Citation
TY - JOUR ID - ca02920g AU - Cameron, A. G. W. PY - 1966 TI - X-ray emission from old novae JA - Nature JO - Nature VL - 212 IS - 5061 SP - 493 EP - 494 DO - 10.1038/212493a0 ER -
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