198 citations · 2k across the 25 of their papers we have counts for
6 papers · 1 filter
The core helium flash revisited: II. Two and three-dimensional hydrodynamic simulations
M. Mocak, E. Mueller, A. Weiss +1
We study turbulent convection during the core helium flash close to its peak by comparing the results of two and three-dimensional hydrodynamic simulations. We use a multidimension…
Sunyaev-Zel'dovich Effect Observations of the Bullet Cluster (1E 0657-56) with APEX-SZ
N. W. Halverson, T. Lanting, P. A. R. Ade +33
We present observations of the Sunyaev-Zel'dovich effect (SZE) in the Bullet cluster (1E 0657--56) using the APEX-SZ instrument at 150 GHz with a resolution of 1 arcmin. The main r…
Evolved stars hint to an external origin of enhanced metallicity in planet-hosting stars
L. Pasquini, M. P. Doellinger, A. Weiss +5
Exo-planets are preferentially found around high metallicity main sequence stars. We aim at investigating whether evolved stars share this property, and what this tells about plane…
Evolution of low-mass metal-free stars including effects of diffusion and external pollution
A. Weiss, S. Cassisi, H. Schlattl +1
We investigate the evolution of low-mass metal-free Population III stars. Emphasis is laid upon the question of internal and external sources for CNO-elements, which - if present i…
The age of the oldest globular clusters
M. Salaris, S. Degl'Innocenti, A. Weiss
The age of three of the oldest clusters -- M15, M68, M92 -- has been redetermined. We use the latest EOS and opacity data available for calculating both isochrones and zero age hor…
3He in stars of low and intermediate mass
Achim Weiss, Josef Wagenhuber, Pavel A. Denissenkov
We follow the evolution of 3He in stars of mass 0.8 -- 10 M (solar units) for Pop. I and II compositions from the main sequence until advanced stages on the AGB. Under standard ass…