Stellar Abundance Anomalies: Open Cluster NGC 7789

Details Stellar Abundance Anomalies: Open Cluster NGC 7789 Stellar Abundance Anomalies: Open Cluster NGC 7789

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004iaus..219..985t&link_type=abstract

Stars as suns : activity, evolution and planets, Proceedings of the 219th symposium of the International Astronomical Union held

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Scientific paper

High-resolution spectra of nine stars in the open cluster NGC 7789 have been obtained with the SOFIN spectrograph on the Nordic Optical Telescope to investigate abundances of more than 20 chemical elements including most sensitive to internal stellar processes as carbon nitrogen sodium aluminium and others. Abundances of carbon were studied using the C2 Swan (01) band head at 563.55 nm. The wavelength interval 798-813 nm with strong CN features was analyzed in order to determine nitrogen abundances and carbon isotope ratios. The oxygen abundances were determined from the [OI] line at 630.0 nm. The abundance results are discussed in the light of theories of various mixing episodes that are predicted to occur during stellar evolution.

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