Zobrazeno 1 - 10
of 54
pro vyhledávání: '"Birk, G. T."'
Aims: The aim of this work is to verify whether turbulent magnetic reconnection can provide the additional energy input required to explain the up to now only poorly understood ionization mechanism of the diffuse ionized gas (DIG) in galaxies and its
Externí odkaz:
http://arxiv.org/abs/1206.0394
Publikováno v:
Astron.Astrophys. 423 (2004) 13-19
Plerionic supernova remnants exhibit radio emission with remarkably flat spectral indices ranging from $\alpha=0.0$ to $\alpha=-0.3$. The origin of very hard particle energy distributions still awaits an explanation, since shock waves generate partic
Externí odkaz:
http://arxiv.org/abs/astro-ph/0405251
Publikováno v:
Astron.Astrophys. 420 (2004) L15-L18
The Earth is a planet with a dipolar magnetic field which is agitated by a magnetized plasma wind streaming from the Sun. The magnetic field shields the Earth's surface from penetrating high energy solar wind particles, as well as interstellar cosmic
Externí odkaz:
http://arxiv.org/abs/astro-ph/0404580
Publikováno v:
Astron.Astrophys. 419 (2004) 161-166
For the nonthermal radio emission of the Galactic Center Arc in situ electron acceleration is imperative. The observed radio spectrum can be modeled by a transport equation for the relativistic electrons which includes particle acceleration by electr
Externí odkaz:
http://arxiv.org/abs/astro-ph/0402595
The remanent magnetisation of meteorite material in the solar system indicates that magnetic fields of several Gauss are present in the protoplanetary disk. It is shown that such relativelystrong magnetic fields can be generated in dusty protoplaneta
Externí odkaz:
http://arxiv.org/abs/astro-ph/0301348
HI observations of high-velocity clouds (HVCs) indicate, that they are interacting with their ambient medium. Even clouds located in the very outer Galactic halo or the intergalactic space seem to interact with their ambient medium. In this paper, we
Externí odkaz:
http://arxiv.org/abs/astro-ph/0207425
Extremely flat and inverted radio spectra as observed in galactic nuclei and BL Lac sources are still a challenge for fast particle acceleration models. Continuous acceleration by electric fields in reconnection regions can result in almost constant
Externí odkaz:
http://arxiv.org/abs/astro-ph/0106565
Observations show significant H\alpha-emissions in the Galactic halo near the edges of cold gas clouds of the Magellanic Stream. The source for the ionization of the cold gas is still a widely open question. In our paper we discuss the critical veloc
Externí odkaz:
http://arxiv.org/abs/astro-ph/0010164
Publikováno v:
Astron.Astrophys.335:26-32,1998
Magnetic field-aligned electric fields are characteristic features of magnetic reconnection processes operating in externally agitated magnetized plasmas. An especially interesting environment for such a process are the coronae of accretion disks in
Externí odkaz:
http://arxiv.org/abs/astro-ph/9803329
Publikováno v:
Monthly Notices of Royal Astronomical Society 296, 165-172 (1998)
Many observations indicate the occurrence of ionised gas in the distant halos of galaxies (including our own). Since photoionisation by stars (mainly O stars, young or evolved low-mass stars depending on the kind of galaxy) does not seem to be exclus
Externí odkaz:
http://arxiv.org/abs/astro-ph/9712156