X-ray emission from an AP star /Phi Herculis/ and a late B star /Pi Ceti/

Details X-ray emission from an AP star /Phi Herculis/ and a late B star /Pi Ceti/ X-ray emission from an AP star /Phi Herculis/ and a late B star /Pi Ceti/

Sep 1979

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979apj...232l.111c&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 232, Sept. 1, 1979, p. L111-L115.

Astronomy and Astrophysics

Astronomy

19

A Stars, B Stars, Late Stars, Spaceborne Astronomy, X Ray Sources, Coronas, Heao, Metallic Stars, Satellite Observation, Sky Surveys (Astronomy), Stellar Spectrophotometry, X Ray Stars

Scientific paper

Using the HEAO 1 soft X-ray sky survey, a search was conducted for X-ray emission from 18 stars in the spectral range B5-A7. The detection of 0.25 keV X-ray sources consistent with the positions of Pi Ceti, a normal B7 V star, and Phi Herculis, a classic Ap star was reported. The detection of these stars argues for large mass motions in the upper layers of stars in this spectral range, and argues against radiative diffusion as the source of abundance anomalies in Ap stars.

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