Planetary nebulae abundances and stellar evolution [PDF]
Astronomy & Astrophysics, 2006 12 pages, 4 tables, 4 figures.
Jeronimo Bernard-Salas, S. R. Pottasch
openaire +13 more sources
SP_Ace: a new code to derive stellar parameters and elemental abundances [PDF]
, 2015 Aims: We developed a new method of estimating the stellar parameters Teff, log g, [M/H], and elemental abundances. This method was implemented in a new code, SP_Ace (Stellar Parameters And Chemical abundances Estimator).
C. Boeche, E. Grebel
semanticscholar +3 more sources
Carbon and oxygen abundances in stellar populations [PDF]
Astronomy & Astrophysics, 2014 Abundances of C, O, and Fe are determined for F and G main-sequence stars in the solar neighborhood in order to study trends and systematic differences in the C/Fe, O/Fe, and C/O ratios for stellar populations.
P. Nissen +5 more
semanticscholar +7 more sources
THE SENSITIVITY OF CONVECTION ZONE DEPTH TO STELLAR ABUNDANCES: AN ABSOLUTE STELLAR ABUNDANCE SCALE FROM ASTEROSEISMOLOGY [PDF]
The Astrophysical Journal, 2011 The base of the convection zone (CZ) is a source of acoustic glitches in the asteroseismic frequency spectra of solar-like oscillators, allowing one to precisely measure the acoustic depth to the feature. We examine the sensitivity of the depth of the CZ
J. V. van Saders, M. Pinsonneault
semanticscholar +5 more sources
Fluorine Abundances in Local Stellar Populations
The Astronomical JournalWe present the first fluorine measurements in 12 normal K giants belonging to the Galactic thin and thick disks using spectra obtained with the Phoenix infrared spectrometer on the 2.1 m telescope at Kitt Peak. Abundances are determined from the (1−0) R9
K. E. Brady +4 more
doaj +3 more sources
The Stellar Abundances and Galactic Evolution Survey (SAGES). I. General Description and the First Data Release (DR1) [PDF]
Astrophysical Journal Supplement Series, 2023 The Stellar Abundances and Galactic Evolution Survey (SAGES) of the northern sky is a specifically designed multiband photometric survey aiming to provide reliable stellar parameters with accuracy comparable to those from low-resolution optical spectra ...
Z. Fan +37 more
semanticscholar +1 more source
Beryllium abundances along the evolutionary sequence of the open cluster IC 4651 – A new test for hydrodynamical stellar models [PDF]
, 2009 [abridged] Previous analyses of lithium abundances in main sequence and red giant stars have revealed the action of mixing mechanisms other than convection in stellar interiors.
R. Smiljanić +3 more
openalex +4 more sources
How accretion of planet-forming disks influences stellar abundances [PDF]
Astronomy & Astrophysics, 2023 Millimeter sized dust grains experience radial velocities exceeding the gas velocities by orders of magnitude. The viscous evolution of the accretion disk adds disk material onto the central star's convective envelope, influencing its elemental ...
Le'on-Alexander Huhn, B. Bitsch
semanticscholar +1 more source
Stellar abundances from line statistics
The Astrophysical Journal, 1980 The method of linear statistical modeling has been combined with a rudimentary model of stellar photospheres to obtain abundance estimates for a large member of ''normal'' and peculiar, upper main sequence stars. The adopted standard abundances, obtained from published fine analyses, can be fitted by our algorithms with about 0.5 dex as the standard ...
C. Cowley, G. Aikman
semanticscholar +4 more sources
The Sixth Data Release of the Radial Velocity Experiment (Rave). II. Stellar Atmospheric Parameters, Chemical Abundances, and Distances [PDF]
Astronomical Journal, 2020 We present part 2 of the sixth and final Data Release (DR6) of the Radial Velocity Experiment (Rave), a magnitude-limited ( ) spectroscopic survey of Galactic stars randomly selected in Earth’s southern hemisphere. The Rave medium-resolution spectra (R ∼
M. Steinmetz +60 more
semanticscholar +1 more source