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Testing the asteroseismic estimates of stellar radii with surface brightness-colour relations and {\it Gaia} DR3 parallaxes. II. Red giants and red clump stars from the {\it Kepler} catalogue
G. Valle, M. Dell'Omodarme, P. G. Prada Moroni +1
A recent investigation highlighted peculiar trends between the radii derived from surface brightness-colour relations (SBCRs) combined with Gaia DR3 parallaxes with respect to aste…
Testing the asteroseismic estimates of stellar radii with surface brightness-colour relations and Gaia DR3 parallaxes. Red giants and red clump stars
G. Valle, M. Dell'Omodarme, P. G. Prada Moroni +1
We compared stellar radii derived from asteroseismic scaling relations with those estimated using two independent surface brightness-colour relations (SBCRs) and Gaia DR3 parallaxe…
Stellar model tests and age determination for RGB stars from the APO-K2 catalogue
G. Valle, M. Dell'Omodarme, P. G. Prada Moroni +1
By adopting the recently empirically derived dependence of -elements on instead of the conventionally applied uniform one, we tested the agreement between stellar…
Element abundances of galactic RGB stars in the APO-K2 catalogue. Dissimilarity in the scaling with [/Fe]
G. Valle, M. Dell'Omodarme, P. G. Prada Moroni +1
We conducted an investigation on the chemical abundances of 4,316 stars in the red giant branch (RGB) phase from the recently released APO-K2 catalogue. Our aim was to characterize…
Constraining the helium-to-metal enrichment ratio from main sequence binary stars. Theoretical analysis of the accuracy and precision of the age and helium abundance estimates
G. Valle, M. Dell'Omodarme, P. G. Prada Moroni +1
We investigated the theoretical possibility of accurately determining the helium-to-metal enrichment ratio from precise observations of double lined eclipsing binary system…
Impact of enhancement on the asteroseismic age determination of field stars. Application to the APO-K2 catalogue
G. Valle, M. Dell'Omodarme, P. G. Prada Moroni +1
We investigated the theoretical biases affecting the asteroseismic grid-based estimates of stellar parameters in the presence of a mismatch between the heavy element mixture of obs…