Astronomy and Astrophysics – Astrophysics
Scientific paper
Mar 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...338..875b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 338, March 15, 1989, p. 875-887.
Astronomy and Astrophysics
Astrophysics
40
Abundance, Beryllium, F Stars, Main Sequence Stars, Open Clusters, Charge Coupled Devices, Dwarf Stars, Lithium, Signal To Noise Ratios, Spectral Line Width, Stellar Rotation
Scientific paper
Spectra of the Be II doublet at 3130.4 and 3131.1 A have been obtained in eight Hyades F dwarfs, including stars in the Hyades Li gap found by Boesgaard and Trippico (1986). Abundances were determined in the standard way, but a 'differential spectroscopy' procedure was also used which involved comparing the Hyades stars with a standard star via a least-squares algorithm to give the best fit between the object and standard spectra in the region immediately around the Be doublet. This procedure was adapted to rapidly rotating stars by convolving with the standard spectrum with a rotation profile of the correct width. A synthesis of the spectrum was done also with 20 spectral lines in the region of the Be blend. There is virtually no change in the Be content in those stars across the temperature region where there is a large deficiency in Li. The Be/H values are about 10 to the -11th, near the solar value of 1.4 x 10 to the -11th.
Boesgaard Ann Merchant
Budge Kent Grimmett
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