Abundances in the Local Region I: G and K Giants
@article{Luck2015AbundancesIT, title={Abundances in the Local Region I: G and K Giants}, author={R. Earle Luck}, journal={arXiv: Solar and Stellar Astrophysics}, year={2015} }
Parameters and abundances for 1133 stars of spectral types F, G, and K of luminosity class III have been derived. In terms of stellar parameters, the primary point of interest is the disagreement between gravities derived with masses determined from isochrones, and gravities determined from an ionization balance. This is not a new result per se; but the size of this sample emphasizes the severity of the problem. A variety of arguments lead to the selection of the ionization balance gravity as…
35 Citations
ABUNDANCES IN THE LOCAL REGION. II. F, G, AND K DWARFS AND SUBGIANTS
- Physics
- 2016
Parameters and abundances for 1002 stars of spectral types F, G, and K of luminosity class IV and V have been derived. After culling the sample for rotational velocity and effective temperature, 867…
Abundances in the Local Region. III. Southern F, G, and K Dwarfs
- Physics
- 2018
Stellar parameters and abundances have been derived from a sample of 907 F, G, and K dwarfs. The highresolution, high signal-to-noise spectra utilized were acquired with the HARPS spectrograph of the…
Red giant masses and ages derived from carbon and nitrogen abundances
- Physics
- 2016
We show that the masses of red giant stars can be well predicted from their photospheric carbon and nitrogen abundances, in conjunction with their spectroscopic stellar labels log g, Teff, and…
A Spectroscopic Survey of Field Red Horizontal-Branch Stars
- Physics, Geology
- 2018
A metallicity, chemical composition, and kinematic survey has been conducted for a sample of 340 candidate field red horizontal branch stars. High resolution, high signal-to-noise spectra were…
Rubidium abundances in solar metallicity stars
- Physics
- 2021
Context. Rubidium is one of the few elements produced by the neutron capture sand r-processes almost in equally proportions. Recently, a Rb deficiency ([Rb/Fe] < 0.0) by a factor of about two with…
The AMBRE Project: Origin and evolution of sulfur in the Milky Way
- PhysicsAstronomy & Astrophysics
- 2021
Context. Sulfur is a volatile chemical element that plays an important role in tracing the chemical evolution of the Milky Way and external galaxies. However, its nucleosynthesis origin and abundance…
A Catalog of Stellar Unified Properties (CATSUP) for 951 FGK-Stars Within 30 pc
- Physics, Geology
- 2017
Almost every star in our Galaxy is likely to harbor a terrestrial planet, but accurate measurements of an exoplanet's mass and radius demands accurate knowledge of the properties of its host star.…
Mass evaluation for red giant stars based on the spectroscopically determined atmospheric parameters
- PhysicsAstrophysics and Space Science
- 2022
The mass (M) of a star can be evaluated from its spectroscopically determined effective temperature (Teff) and metallicity ([Fe/H]) along with the luminosity (L; derived from parallax), while…
Sulfur and zinc abundances of red giant stars
- Physics
- 2016
Sulfur and zinc are chemically volatile elements, which play significant roles as depletion-free tracers in studying galactic chemical evolution. However, regarding red giants having evolved off the…
Fundamental properties of red-clump stars from long-baseline H-band interferometry
- PhysicsAstronomy & Astrophysics
- 2018
Observations of 48 red-clump stars were obtained in the H band with the PIONIER instrument installed at the Very Large Telescope Interferometer. Limb-darkened angular diameters were measured by…
References
SHOWING 1-10 OF 77 REFERENCES
PARAMETERS AND ABUNDANCES IN LUMINOUS STARS
- Physics
- 2014
Parameters and abundances for 451 stars of spectral types F, G, and K of luminosity classes I and II have been derived. Absolute magnitudes and E(B – V) have been derived for the warmer stars in…
Abundances in G. Dwarfs.VI. a Survey of Field Stars.
- Physics
- 1962
Data are presented for deriving the abundances of the elements in 21 field stars of very nearly solar type. Ironto-hydrogen ratios are obtained from curves of growth for which the ionization…
Giants in the Local Region
- Physics, Geology
- 2007
We present parameter and abundance data for a sample of 298 nearby giants. The spectroscopic data for this work have a resolution of R ~ 60,000, S/N > 150, and spectral coverage from 475 to 685 nm.…
Stellar Parameters and Abundance Analysis of 58 Late G Giants
- Physics
- 2010
We present stellar atmospheric parameters, and kinematic parameters for a part of Xinglong Planet Search Program sample – 58 late G-type giants, obtained at Okayama Astrophysical Observatory.…
The Lithium Abundances of a Large Sample of Red Giants
- Physics, Geology
- 2014
The lithium abundances for 378 G/K giants are derived with non-local thermodynamic equilibrium correction considered. Among these are 23 stars that host planetary systems. The lithium abundance is…
OXYGEN ABUNDANCES IN NEARBY FGK STARS AND THE GALACTIC CHEMICAL EVOLUTION OF THE LOCAL DISK AND HALO
- Physics
- 2013
Atmospheric parameters and oxygen abundances of 825 nearby FGK stars are derived using high-quality spectra and a non-local thermodynamic equilibrium analysis of the 777 nm O I triplet lines. We…
ABUNDANCE RATIOS AND GALACTIC CHEMICAL EVOLUTION
- Physics
- 1997
▪ Abstract The metallicity of stars in the Galaxy ranges from [Fe/H] = −4 to +0.5 dex, and the solar iron abundance is e(Fe) = 7.51 ± 0.01 dex. The average values of [Fe/H] in the solar neighborhood,…
Homogeneous photospheric parameters and C abundances in G and K nearby stars with and without planets
- Physics, Geology
- 2011
Aims. We present a determination of photospheric parameters and carbon abundances for a sample of 172 G and K dwarf, subgiant, and giant stars with and without detected planets in the solar ne…
Carbon and Oxygen abundances across the Hertzsprung gap
- Physics
- 2014
We derived atmospheric parameters and spectroscopic abundances for C and O for a large sample of stars located in the Hertzsprung gap in the Hertzsprung-Russell Diagram in order to detect chemical…
Stellar Parameters and Elemental Abundances of Late-G Giants
- Physics, Geology
- 2008
The properties of 322 intermediate-mass late-G giants (comprising 10 planet-host stars) selected as the targets of the Okayama Planet Search Program, many of which are red-clump giants, were…