Barium stars observed with the Coude Echelle Spectrometer

Details Barium stars observed with the Coude Echelle Spectrometer Barium stars observed with the Coude Echelle Spectrometer

Dec 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983msngr..34...30h&link_type=abstract

ESO Messenger (ISSN 0722-6691), Dec. 1983, p. 30-33.

Astronomy and Astrophysics

Astrophysics

Astrophysics, Barium, Metallic Stars, Nuclear Fusion, Stellar Spectra, Abundance, Enrichment, Spectrometers, Stellar Evolution

Scientific paper

The ESO's Coude Echelle Spectrometer is used to obtain spectra of sufficiently high resolution to yield true stellar line profiles, for the case of the Ba stars that make up at least 1 percent of all red giants. An attempt is made to determine the mechanism by which unorthodox mixing events and neutron releases occur in the lower red giant branch. Data are obtained which suggest an entire sequence of combined neutron irradiation and mixing processes, although the standard stellar evolution theory does not predict heavy element production at the relatively high effective temperatures and low luminosities of the objects presently studied.

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