7 papers
Unveiling Dark Matter with HI and Halpha Data - Observational Problems
G. Gentile, D. Vergani, P. Salucci +2
We present combined Halpha+HI rotation curves for a sample of spiral galaxies. Most of the velocity profiles (spectra at single points) in these galaxies are asymmetric, preventing…
The head-tail structure of high-velocity clouds - A survey of the northern sky
C. Bruens, J. Kerp, P. M. W. Kalberla +1
We present new observational results on high-velocity clouds (HVCs) based on an analysis of the Leiden/Dwingeloo HI survey. We cataloged all HVCs with NHI > 1 10^19 cm^-2 and found…
H2 dark matter in the galactic halo from EGRET
P. M. W. Kalberla, Yu. A. Shchekinov, R. -J. Dettmar
We present a model for the interpretation of the gamma-ray background emission from the Galactic halo, which we attribute to interaction of high-energy cosmic rays with dense molec…
Hydrostatics of the Galactic Halo
P. M. W. Kalberla, J. Kerp
We investigated a hydrostatic equilibrium model of the Milky Way following Parker (1966), to constrain the large scale properties of the interstellar medium. In our approach we fou…
The gaseous Milky Way Halo
P. M. W. Kalberla, J. Kerp
In 1998 several papers claim the detection of an ubiquitous gaseous phase within the Galactic halo. Here we like to focus on the detections of X-ray emitting gas within the Galacti…
Soft X-rays from High-Velocity Clouds
J. Kerp, P. M. W. Kalberla, M. J. Freyberg +2
The ROSAT mission gave us the unique possibility to study the galactic interstellar medium by ``shadowing'' observations on arcmin angular resolution level. The high sensitivity of…