SIMBAD references

2005PASJ...57..109T - Publ. Astron. Soc. Jap., 57, 109-125 (2005/February-0)

Stellar parameters and photospheric abundances of late-G giants: properties of the targets of the Okayama planet search program.

TAKEDA Y., SATO B., KAMBE E., IZUMIURA H., MASUDA S. and ANDO H.

Abstract (from CDS):

begin{HTML} Towards clarifying the properties of late-G giants, for which we are currently conducting a planet-search project at Okayama Astrophysical Observatory, an extensive spectroscopic study has been performed for our first target sample of fifty-seven G6-G9 III stars, in order to establish the atmospheric parameters (<i>T</i><sub>eff</sub>, log <i>g</i>, <i>v</i><sub>t</sub>, and [Fe/H]), the stellar mass along with the evolutionary status, and the photospheric abundances of various elements. It was confirmed that the conventional spectroscopic method of parameter determination using Fe <FONT SIZE="-2">I</FONT>/ <FONT SIZE="-2">II</FONT> lines with the assumption of LTE works successfully for these evolved stars. We determined the abundances (relative to the Sun) of 19 elements, and examined how their [X/Fe] ratios behave themselves with the run of [Fe/H]. While the trends appear to be similar to those exhibited by disk dwarfs for a number of elements, some elements (C, O, Na) showed appreciable anomalies, which may be interpreted as being due to a dredge-up of nuclear-processed material. Since the [Fe/H] values of these stars tend to be somewhat biased towards a subsolar regime, some mechanism of slightly reducing the metallicity might be suspected.

Abstract Copyright:

Journal keyword(s): stars: abundances - - stars: atmospheres - - stars: fundamental parameters - - stars: late-type

VizieR on-line data: <Available at CDS (J/PASJ/57/109): table1.dat table2.dat tablee1a.dat tablee1.dat tablee2.dat average.dat h104985.dat h104985a.dat>

Simbad objects: 57

goto Full paper

goto View the reference in ADS

To bookmark this query, right click on this link: simbad:2005PASJ...57..109T and select 'bookmark this link' or equivalent in the popup menu


2019.11.17-07:13:28

© Université de Strasbourg/CNRS

    • Contact