6 papers · 1 filter
H2 molecules and cold clouds in cooling flow clusters
L. Grenacher, Ph. Jetzer, D. Puy
We investigated the cooling mechanism due to H2 and HD molecules in order to determine the minimum temperature achievable by cold H2-HD clouds in cooling flow clusters.
Molecular clouds in cooling flow cluster of galaxies
L. Grenacher, Ph. Jetzer, D. Puy
In many clusters of galaxies there is evidence for cooling flow in the central regions. A possibility is that a fraction of the gas forms cold molecular clouds. We investigate the…
Cold clouds in cooling flows
L. Grenacher, Ph. Jetzer, D. Puy
In many clusters of galaxies there is evidence for cooling flows which deposit large quantities of cool gas in the central regions. A fraction of this gas might accumulate as dense…
Microlensing towards different Galactic targets
Lukas Grenacher, Philippe Jetzer, Marcus Strässle +1
We calculate the optical depth and the number of events due to gravitational microlensing towards the Galactic bulge, the spiral arm directions Scutum, Scutum, Normae,…
Dark Matter in the Dwarf Galaxy NGC 247
M. Straessle, M. Huser, Ph. Jetzer +1
Dwarf galaxies are dominated by dark matter even in the innermost regions and, therefore, provide excellent probes for the investigation of dark halos. To that purpose, we analyse…
Gamma ray emission from a baryonic dark halo
F. De Paolis, G. Ingrosso, Ph. Jetzer +1
A recent re-analysis of EGRET data by Dixon et al. has led to the discovery of a statistically significant diffuse -ray emission from the galactic halo. We show that this emissi…