Other
Scientific paper
Jan 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981apj...243..234j&link_type=abstract
Astrophysical Journal, Part 1, vol. 243, Jan. 1, 1981, p. 234-243.
Other
78
Stellar Radiation, Stellar Spectra, Subdwarf Stars, White Dwarf Stars, X Ray Sources, Binary Stars, Calcium, Computer Programs, Heao 2, Proportional Counters, Radiant Flux Density, Stellar Coronas, Stellar Luminosity, Stellar Magnetic Fields
Scientific paper
Einstein (HEAO 2) observations of stars within 6.5 pc are reported with much reference to optical information. The detected stars are +43°44 AB, η Eri, Ross 47, +44°2051 AB, Wolf 630 AB, VB8, 70 Oph AB, δ Pav, -36°13540 AB, 61 Cyg AB, and Krüger 60 AB. Other stars observed with upper limits of X-ray flux density are τ Cet, 82 Eri, LP 658-2, AC +79°3888, and Wolf 629. The sample includes a white dwarf, an old subdwarf, agiant, and dG-dM, dMe stars in various age groups. Two out of four objects that contain optical flare stars appear to flare in X-rays within 2 × 103 s of observation, but several objects that do not flare optically have not similarly flared in X-rays. Stellar X-ray luminosity is shown coordinated with B - v, V, and photospheric luminosity L. The stars Wolf 630 AB, η Eri, and 70 Oph AB are exceptionally luminous in X-rays, but no controlling parameter for X-ray production or deficiency has been isolated.
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