547 citations · 3.6k across the 23 of their papers we have counts for
23 papers
The thermodynamics of a gravitating vacuum
M. Heyl, H. J. Fahr, M. Siewert
In the present days of modern cosmology it is assumed that the main ingredient to cosmic energy presently is vacuum energy with an energy density that is constant…
Modeled IBEX/INCA skymaps including the keV-ENA source extinction in the outer heliosphere
M. Siewert, H. -J. Fahr
Understanding the outer heliospheric interface is a major challenge, especially in the light of recent observations by the IBEX and Voyager missions. We present further details on…
Entropy generation at the multi-fluid MHD solar wind termination shock
H. -J. Fahr, M. Siewert
In a series of earlier papers, we have developed expressions for ion and electron velocity distribution functions and theirvelocity moments at the passage over the solar wind termi…
Does PIONEER measure local spacetime expansion?
Hans-Joerg Fahr, Mark Siewert
There is a longstanding mystery connected with the radiotracking of distant interplanetary spaceprobes like ULYSSES, Galileo and especially the two NASA probes PIONEER 10 and 11. C…
A possible association of the new VHE gamma-ray source HESS J1825--137 with the pulsar wind nebula G18.0--0.7
HESS Collaboration, F. A. Aharonian
We report on a possible association of the recently discovered very high-energy -ray source HESS J1825--137 with the pulsar wind nebula (commonly referred to as G 18.0--0.7) of…
Discovery of very high energy gamma-rays associated with an X-ray binary
H. E. S. S. Collaboration, :, F. Aharonian
X-ray binaries are composed of a normal star in orbit around a neutron star or stellar-mass black hole. Radio and X-ray observations have led to the presumption that some X-ray bin…