5 papers
Efficient acceleration and radiation in Poynting flux powered GRB outflows
G. Drenkhahn, H. C. Spruit
We investigate the effects of magnetic energy release by local magnetic dissipation processes in Poynting flux-powered GRBs. For typical GRB parameters (energy and baryon loading)…
Acceleration of GRB outflows by Poynting flux dissipation
Georg Drenkhahn
We study magnetically powered relativistic outflows in which a part of the magnetic energy is dissipated internally by reconnection. For GRB parameters, and assuming that the recon…
Large scale magnetic fields and their dissipation in GRB fireballs
H. C. Spruit, F. Daigne, G. Drenkhahn
We consider possible geometries of magnetic fields in GRB outflows, and their evolution with distance from the source. For magnetically driven outflows, with an assumed ratio of ma…
SN1994D in NGC4526: a normally bright type Ia supernova
Georg Drenkhahn, Tom Richtler
SN1994D of type Ia has been suspected not to fit into the relation between decline rate, colour, and brightness. However, an individual distance of its host galaxy, NGC4526, other…
The Hubble Constant from the Fornax Cluster Distance
Tom Richtler, Georg Drenkhahn, Matias Gomez +1
Type Ia supernovae are the best cosmological standard candles available. The intrinsic scatter of their decline-rate- and colour-corrected peak brightnesses in the Hubble diagram i…