SIMBAD references

2008A&A...485..571J - Astronomy and Astrophysics, volume 485, 571-584 (2008/7-2)

Metallicities and activities of southern stars.

JENKINS J.S., JONES H.R.A., PAVLENKO Y., PINFIELD D.J., BARNES J.R. and LYUBCHIK Y.

Abstract (from CDS):

We present the results from high-resolution spectroscopic measurements to determine metallicities and activities of bright stars in the southern hemisphere. We measured the iron abundances ([Fe/H]'s) and chromospheric emission indices (loghR'HK) of 353 solar-type stars with V=7.5-9.5. [Fe/H] abundances are determined using a custom χ2 fitting procedure within a large grid of Kurucz model atmospheres. The chromospheric activities were determined by measuring the amount of emission in the cores of the strong CaII HK lines. Our comparison of the metallicity sample to other [Fe/H] determinations was found to agree at the ±0.05dex level for spectroscopic values and at the ±0.1dex level for photometric values. The distribution of chromospheric activities is described by a bimodal distribution, agreeing with the conclusions from other works. Also an analysis of Maunder minimum status was attempted, and it was found that 6±4 stars in the sample could be in a Maunder minimum phase of their evolution and hence the Sun should only spend a few per cent of its main sequence lifetime in Maunder minimum.

Abstract Copyright:

Journal keyword(s): stars: abundances - stars: activity - stars: atmospheres - stars: planetary systems

VizieR on-line data: <Available at CDS (J/A+A/485/571): table4.dat>

Simbad objects: 326

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2008A&A...485..571J and select 'bookmark this link' or equivalent in the popup menu


2019.12.06-11:53:00

© Université de Strasbourg/CNRS

    • Contact