Showing 2012 · astro-ph.SRShow all

25 papers · 2 filters

astro-ph.SR2012★ 403 cited

On the Star Formation Efficiency of Turbulent Magnetized Clouds

Christoph Federrath, Ralf S. Klessen

We study the star formation efficiency (SFE) in simulations and observations of turbulent, magnetized, molecular clouds. We find that the probability density functions (PDFs) of th…

astro-ph.SR2012★ 37 cited

The Impact of Helium-Burning Reaction Rates on Massive Star Evolution and Nucleosynthesis

Christopher West, Alexander Heger, Sam M. Austin

We study the sensitivity of presupernova evolution and supernova nucleosynthesis yields of massive stars to variations of the helium-burning reaction rates within the range of thei…

astro-ph.SR2012★ 19 cited

Cyanogen in NGC 1851 RGB and AGB Stars: Quadrimodal Distributions

S. W. Campbell, D. Yong, E. C. Wylie-de Boer +7

The Galactic globular cluster NGC 1851 has raised much interest since HST photometry revealed that it hosts a double subgiant branch. Here we report on our homogeneous study into t…

astro-ph.SR2012★ 15 cited

New Primary Mechanisms for the Synthesis of Rare 9Be in Early Supernovae

P. Banerjee, Y. -Z. Qian, W. C. Haxton +1

We present two new primary mechanisms for the synthesis of the rare nucleus 9Be, both triggered by nu-induced production of 3H followed by 4He(3H,gamma)7Li in the He shells of core…

astro-ph.SR2012★ 5 cited

The Current State-Of-The-Art In Active Region Seismology

Hamed Moradi

Helioseismology is the study of the variations in the internal structure and properties of the dynamics of the Sun from measurements of its surface oscillations. With the 2010 laun…

astro-ph.SR2012★ 92 cited

The Na-O anticorrelation in horizontal branch stars. III. 47 Tuc and M 5

R. G. Gratton, S. Lucatello, A. Sollima +7

To check the impact of the multiple population scenario for globular clusters on their HB, we present an analysis of the composition of 110 red HB (RHB) stars in 47 Tucanae and of…