Metallicities & activities of southern stars (Jenkins+, 2008)

Details Metallicities & activities of southern stars (Jenkins+, 2008) Metallicities & activities of southern stars (Jenkins+, 2008)

Apr 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008ycat..34850571j&link_type=abstract

VizieR On-line Data Catalog: J/A+A/485/571. Originally published in: 2008A&A...485..571J

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Stars: Nearby, Photometry: Ubv, Abundances: [Fe/H]

Scientific paper

This table comprises a list of stellar metallicities and activities for a number of solar-type stars in the southern hemisphere using high-resolution (R~46000) spectra acquired at the ESO-MPI 2.2m telescope and the instrument FEROS. The stars all have B-V colours in the range 0.5-0.9, V magnitudes between 7.5-9.5 and were selected from the Hipparcos catalogue (Perryman et al., 1997, Cat. ). The chromospheric activities along with their photon counting errors are shown, and were extracted by comparing the flux in triangular bandpasses centred in the cores of the Calcium II H and K lines (wavelengths of 3933.664{AA} and 3968.470{AA}) against the flux in two square bandpass regions centred on the continuum at either side of these lines (wavelengths of 3891{AA} and 4001{AA}). These values have been calibrated onto the Mt. Wilson system of measurements (Duncan et al., 1991, Cat. ) and then converted to the commonly used logRhk system (Noyes et al. 1984ApJ...287..769N) to remove the photospheric component of the flux. The metallicities shown in column 6, were measured by comparing a grid of synthetic spectra (WITA6; Pavlenko et al., 1995A&A...303..807P) to a number of mostly weak and unblended FeI lines at this spectral resolution. The internal errors were determined by fitting the Chi-squared parabola and after comparison with other works these values were found to agree to <0.1dex or 0.05dex with other high-resolution spectral abundances (e.g. Valenti & Fischer, 2005, Cat. ). The tail of objects with really high errors were mainly lower S/N spectra due to changing weather patterns.
(1 data file).

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