tipa -- 11/30/2007

The circumstellar medium around a rapidly rotating, chemically homogeneously evolving, possible gamma-ray burst progenitor

• Authors: Allard Jan van Marle, Norbert Langer, Sung-Chul Yoon, Guillermo Garcia-Segura

Enhanced high-energy neutrino emission from choked gamma-ray bursts due to meson and muon acceleration

• Authors: Hylke B. J. Koers, Ralph A. M. J. Wijers

Occurrence of Metal-free Galaxies in the Early Universe

• Authors: Jarrett L. Johnson, Thomas H. Greif, Volker Bromm

Extracting the Gamma Ray Signal from Dark Matter Annihilation in the Galactic Center Region

• Authors: Scott Dodelson, Dan Hooper, Pasquale D. Serpico

Dark-matter sterile neutrinos in models with a gauge singlet in the Higgs sector

• Authors: Kalliopi Petraki, Alexander Kusenko