A search for soft X-ray emission from red-giant coronae

Details A search for soft X-ray emission from red-giant coronae A search for soft X-ray emission from red-giant coronae

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974apj...194l..75m&link_type=abstract

Astrophysical Journal, vol. 194, Dec. 1, 1974, pt. 2, p. L75-L77.

Astronomy and Astrophysics

Astronomy

14

Background Radiation, Coronas, Giant Stars, Stellar Radiation, X Ray Astronomy, Globular Clusters, Oao 3, Radiant Flux Density, Spaceborne Astronomy, Stellar Temperature, X Ray Stars

Scientific paper

Hills has pointed out that if red-giant coronae are weak sources of soft X-rays, then the problems of the identification of the local component of the soft X-ray background and the observed lack of gas in globular clusters may be simultaneously resolved. Using instrumentation aboard OAO Copernicus, we have searched unsuccessfully for emission in the 10-100 A band from four nearby red giants. In all cases, our upper limits are of the order of the minimum theoretically predicted fluxes.

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