Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- University of TurinIT1.2k papers
- University of ManchesterGB1.1k papers
- University of FerraraIT1.1k papers
- Budker Institute of Nuclear PhysicsRU1.1k papers
- Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di FrascatiIT1k papers
- Centre National de la Recherche ScientifiqueFR1k papers
- Johannes Gutenberg University MainzDE1k papers
- University of PerugiaIT1k papers
- Uppsala UniversitySE912 papers
- Istituto Nazionale di Fisica Nucleare, Sezione di FerraraIT903 papers
- University of GroningenNL898 papers
- Commissariat à l'Énergie Atomique et aux Énergies AlternativesFR888 papers
23 papers · 2 filters
Neutrinos from active galactic nuclei as a diagnostic tool
C. Schuster, M. Pohl, R. Schlickeiser
Active galactic nuclei (AGN) are known as sources of high energy gamma-rays. The emission probably results from non-thermal radiation of relativistic jets belonging to the AGN. Ear…
Channeled blast wave behavior based on longitudinal instabilities
M. Pohl, I. Lerche, R. Schlickeiser
To address the important issue of how kinetic energy of collimated blast waves is converted into radiation, Pohl & Schlickeiser (2000) have recently investigated the relativistic t…
CN and HNC Line Emission in IR Luminous Galaxies
S. Aalto, A. G. Polatidis, S. Huttemeister +1
We have observed HNC 1-0, CN 1-0 and 2-1 line emission in a sample of 13 IR luminous (LIRGs, L_IR > 10E11 Lo) starburst and Seyfert galaxies. HNC 1-0 is detected in 9, CN 1-0 is de…
A search for radio supernovae and supernova remnants in the region of NGC1569's super star clusters
A. Greve, A. Tarchi, S. Huettemeister +4
We have used MERLIN, at 1.4 and 5 GHz, to search for radio supernovae (RSNe) and supernova remnants (SNRs) in the unobscured irregular dwarf galaxy NGC1569, and in particular in th…
Spectroscopy of faint emission line nebulae
Ralf-Juergen Dettmar
Based on results obtained with FORS1 in long-slit mode we demonstrate the power of the VLT for the spectroscopy of faint emission line nebulae such as the gaseous halos of diffuse…
The cataclysmic variable CW 1045+525: a secondary-dominated dwarf nova?
C. Tappert, J. R. Thorstensen, W. H. Fenton +3
We present spectroscopic and photometric observations of the cataclysmic variable CW 1045+525. Both the optical spectrum and the photometric lightcurve show a strong contribution o…
Infrared to millimetre photometry of ultra-luminous IR galaxies: new evidence favouring a 3-stage dust model
U. Klaas, M. Haas, S. A. H. Mueller +7
Infrared to millimetre spectral energy distributions have been obtained for 41 bright ultra-luminous infrared galaxies. The observations were carried out with ISOPHOT between 10 an…
NGC 5775: anatomy of a disk-halo interface
S. -W. Lee, J. A. Irwin, R. -J. Dettmar +3
We present the first high-resolution study of the disk-halo interface in an edge-on galaxy (NGC 5775) in which every component of the interstellar medium is represented and resolve…
Radiation from collision-dominated relativistic pair fireballs
M. Boettcher, R. Schlickeiser, A. Marra
It is generally accepted that gamma-ray bursts (GRBs) are initiated by a relativistic pair fireball, converting its internal energy into kinetic energy of a relativistically moving…
LogN-LogS Studies of EGRET Sources
O. Reimer, D. L. Bertsch
A comprehensive investigation of logN-logS distributions of gamma-ray sources discovered by EGRET has been performed for subsequent use in population studies. Existing models expla…
Spectral cutoffs in EGRET gamma-ray sources
O. Reimer, D. L. Bertsch
The EGRET instrument has measured detailed photon spectra between 30 MeV and 10 GeV, which are represented by means of single power-law fits for sources in the 3EG catalog. However…
Excess GeV radiation and cosmic ray origin
I. Büsching, M. Pohl, R. Schlickeiser
Recent EGRET observations of the diffuse Galactic gamma-ray emission reveal a spectrum which is incompatible with the assumption that the cosmic ray spectra measured locally hold t…
Gas properties in the Medusa minor merger - comparing with ULIRGs
S. Aalto, S. Huttemeister, F. Walter
High resolution observations of CO and 13CO 1--0 in the Medusa (NGC4194) minor merger show the CO/13CO 1--0 intensity ratio (R) increasing from normal values (5-10) in the outer pa…
Gas Properties in the Starburst Centers of Barred Galaxies
S. Huettemeister, S. Aalto
The physical properties of molecular gas can be deduced from the analysis of line intensity ratios, most commonly of the CO isotopomers 12CO and 13CO. Barred galaxies, especially t…
Conversion Problems: How (Not) to Determine Molecular Masses in Dwarf Galaxies
S. Huettemeister
The determination of molecular gas masses in star forming dwarf irregular galaxies is crucial to assess the star formation process in these objects. But the derivation of the molec…
Properties of tidally-triggered vertical disk perturbations
U. Schwarzkopf, R. -J. Dettmar
We present a detailed analysis of the properties of warps and tidally-triggered perturbations perpendicular to the plane of 47 interacting/merging edge-on spiral galaxies. The deri…
The Influence of the Gravitational Acceleration on the Supernova-Driven P arker Instability
A. Steinacker, Yu. A. Shchekinov
Within a framework of 2D MHD simulations, we explore the dynamical regimes initi ated by a supernova explosion in a magnetized stratified ISM. We concentrate on the formation of la…
Warm and Hot Diffuse Gas in Dwarf Galaxies
Dominik J. Bomans
Dwarf galaxies provide a special environment due to their low mass, small size and generally low metal content. These attributes make them perfect laboratories for the interaction…
A Molecular Tidal Tail in the Medusa Minor Merger
S. Aalto, S. Huettemeister, A. G. Polatidis
We have detected CO 1-0 emission along the tidal tail of the NGC 4194 (the Medusa) merger. It is the first CO detection in the optical tail of a minor merger. Emission is detected…
Incompatibility of a comoving Ly-alpha forest with supernova-Ia luminosity distances
Jens Thomas, Hartmut Schulz
Recently Perlmutter et al. suggested a positive value of Einstein's cosmological constant Lambda on the basis of luminosity distances from type-Ia supernovae. However, Lambda world…
Dust emission from 3C radio galaxies and quasars: New ISO observations favour the unified scheme
K. Meisenheimer, M. Haas, S. A. H. Müller +3
In order to test the unified scheme for luminous radio galaxies and quasars we observed 10 galaxy/quasar pairs from the 3CR catalogue with ISOPHOT at infrared wavelengths between 5…
Bubbles in galactic haloes
Yu. A. Shchekinov, R. -J. Dettmar, A. Schroeer +1
We briefly discuss a possible interconnection of vertical HI structures observed in the Milky Way Galaxy with large scale blow-outs caused by the explosions of multiple clustered S…
Comment on the first-order Fermi acceleration at ultra-relativistic shocks
M. Ostrowski, J. Bednarz
The first-order Fermi acceleration process at an ultra-relativistic shock wave is expected to create a particle spectrum with the unique asymptotic spectral index sigma_{gamma >> 1…