The CNO stars

Details The CNO stars The CNO stars

Dec 1974

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974a%26a....36..401j&link_type=abstract

Astronomy and Astrophysics, vol. 36, no. 3, Dec. 1974, p. 401-408.

Astronomy and Astrophysics

Astrophysics

21

Abundance, Astronomical Catalogs, B Stars, Light Elements, Stellar Spectra, Angular Velocity, Carbon, Nitrogen, Oxygen, Radial Velocity, Ubv Spectra

Scientific paper

This paper deals with those peculiar B-type stars which exhibit anomalies in the behavior of the light elements. Based upon a discussion of published and new observational material, it is shown that a large fraction exhibits evidence of changes in the spectrum. This result throws doubt upon the reality of a proposed subdivision of the stars into a C-rich and an N-rich group. A summary of the spectrum variations is provided. The analysis of the photometry, the radial velocity and the rotational velocities shows that the stars are concentrated in a small range of U-B colors, that the generally exhibit variable radial velocity and show rotation. A discussion of related groups of stars shows that there exists no solution of continuity with other groups exhibiting anomalies in helium and other light elements.

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