Abundance anomalies of carbon and nitrogen in the IUE spectra of Algol-type interacting binaries

Details Abundance anomalies of carbon and nitrogen in the IUE spectra of Algol-type interacting binaries Abundance anomalies of carbon and nitrogen in the IUE spectra of Algol-type interacting binaries

Nov 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990stin...9125972m&link_type=abstract

Final Status Report, 1 Dec. 1988 - 30 Nov. 1990 Pennsylvania State Univ., Fogelsville.

Astronomy and Astrophysics

Astrophysics

Abundance, Anomalies, Astrophysics, Binary Stars, Depletion, Losses, Mixing, Nuclear Fusion, Stellar Envelopes, Stellar Interiors, Stellar Mass, Carbon, Combustion, Helium, Hydrogen, Magnesium, Nitrogen

Scientific paper

There are two primary ways in which the products of nucleosynthesis in stellar interiors may appear at the surface of a star. These are mixing and/or loss of the original unburned stellar envelope. In interacting binaries, overflow can contribute dramatically to envelope loss. The simplest abundance anomalies to be expected from nuclear burning of hydrogen, helium, or carbon would be under or over abundances H, He, C, O, Ne, and Mg. In addition, it is expected that carbon is initially severely depleted, while nitrogen is enhanced during hydrogen burning via the CNO cycle in stars above two solar masses. Other, more subtle anomalies are also expected, and elements heavier than magnesium can be created during very late evolution by nuclear burning in massive stars. Consequently, it is expected that abundance anomalies of various kinds should occur in interacting binaries where one or both stars have lost significant amounts of mass.

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