SIMBAD references

2005PASJ...57...65T - Publ. Astron. Soc. Jap., 57, 65-82 (2005/February-0)

Photospheric CNO abundances of solar-type stars.


Abstract (from CDS):

begin{HTML} We determined the C, N, and O abundances of 160 nearby F, G, and K dwarfs and subgiants by using spectra obtained with the HIDES spectrograph at Okayama Astrophysical Observatory, with the purposes of (1) establishing the runs of [C/Fe], [N/Fe], and [O/Fe] for these galactic disk stars in the metallicity range of -1 \lesssim [Fe/H] \lesssim +0.4, (2) searching for any difference in the CNO abundances of planet-host stars as compared to non-planet-host stars, and (3) examining the consistency of the abundances derived from different lines to check the validity of the analysis. The non-LTE effect on the abundance determination was taken into consideration based on our extensive statistical-equilibrium calculations. We confirmed that consistent abundances are mostly accomplished between different lines, and that [C/Fe] as well as [O/Fe] progressively increase with a decrease in [Fe/H] with the slope of the former (∼ 0.2-0.3) being shallower than the latter (∼ 0.4-0.5), while [N/Fe] does not show any clear systematic trend with the metallicity. The [C/Fe], [N/Fe], and [O/Fe] values of 27 planet-harboring stars (included in our sample of 160 stars) were shown to be practically indistinguishable from those exhibited by non-planet-harboring stars of similar metallicities.

Abstract Copyright:

Journal keyword(s): line: formation - - stars: abundances - - stars: atmospheres - - stars: late-type - - stars: planetary systems

VizieR on-line data: <Available at CDS (J/PASJ/57/65): 22 files>

Simbad objects: 28

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