9.4k citations · 12k across the 39 of their papers we have counts for
6 papers · 1 filter
Chemical similarities between Galactic bulge and local thick disk red giant stars
J. Melendez, M. Asplund, A. Alves-Brito +8
The evolution of the Milky Way bulge and its relationship with the other Galactic populations is still poorly understood. The bulge has been suggested to be either a merger-driven…
Signatures of Granulation in the Spectra of K-Dwarfs
I. Ramirez, C. Allende Prieto, D. L. Lambert +1
Very high resolution (R>150,000) spectra of a small sample of nearby K-dwarfs have been acquired to measure the line asymmetries and central wavelength shifts caused by convective…
Beyond 1D: spectral line formation with 3D hydrodynamical model atmospheres of red giants
R. Collet, M. Asplund, R. Trampedach
We present the results of realistic, 3D, hydrodynamical, simulations of surface convection in red giant stars with varying effective temperatures and metallicities. We use the conv…
Chemically Tagging the HR1614 Moving Group
G. M. De Silva, K. C. Freeman, J. Bland-Hawthorn +2
We present abundances for a sample of F,G,K dwarfs of the HR1614 moving group based on high resolution, high S/N ratio spectra from AAT/UCLES. Our sample includes stars from Feltzi…
An Extremely Large Excess of 18O in the Hydrogen-Deficient Carbon Star, HD 137613
Geoffrey C. Clayton, Falk Herwig, T. R. Geballe +4
We report the discovery of a uniquely large excess of 18O in the hydrogen-deficient carbon (HdC) star, HD 137613, based on a spectrum of the first overtone bands of CO at 2.3-2.4 m…
Abundance analyses of cool extreme helium stars
Gajendra Pandey, N. Kameswara Rao, David L. Lambert +2
Extreme helium stars (EHe) with effective temperatures from 8000K to 13000K are among the coolest EHe stars and overlap the hotter R CrB stars in effective temperature. The cool EH…