X-Ray Emission from O-Type Stars: Parameters Which Affect It
Abstract
As a result of previous analyses of the X-ray fluxes of O-type stars, it has been established that, surprisingly, there is no correlation between X-ray flux and such basic parameters as M, R, v(rot), T(eff), mass accretion rate v(infinity), L(w) = mass accretion rate v(infinity), and wind energy. In this paper, other factors influencing the X-ray flux of the hottest stars are sought. As a result of the present analysis, it is found that stars embedded in dense clouds are often X-ray brighter, runaway stars are fainter in X-rays, massive binaries emit more X-rays than single stars, and radio-bright stars are also more active in X-rays. All these correlations lead to the conclusion that the stellar environment and the interaction of the stellar wind with circumstellar matter (possible remnants of protostellar clouds) play a dominant role in the production of the X-ray flux.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 1989
- DOI:
- 10.1086/167667
- Bibcode:
- 1989ApJ...342.1091C
- Keywords:
-
- O Stars;
- Stellar Radiation;
- X Ray Stars;
- Early Stars;
- Molecular Clouds;
- Protostars;
- Radio Emission;
- Stellar Mass Ejection;
- Stellar Winds;
- Astrophysics;
- STARS: EARLY-TYPE;
- STARS: MASS LOSS;
- STARS: WINDS;
- X-RAYS: SOURCES