Zobrazeno 1 - 10
of 60
pro vyhledávání: '"Geppert, Ulrich"'
Autor:
Sznajder, Maciej, Geppert, Ulrich
The heating of the real polar cap surface of radio pulsars by the bombardment of ultra-relativistic charges is studied. The real polar cap is a significantly smaller area within or close by the conventional polar cap which is encircled by the last op
Externí odkaz:
http://arxiv.org/abs/2002.08593
Autor:
Geppert, Ulrich
Publikováno v:
2017JApA...38...46G
The magnetic and thermal evolution of neutron stars is a very complex process with many nonlinear interactions. For a decent understanding of neutron star physics, these evolutions cannot be considered isolated. A brief overview is presented, which d
Externí odkaz:
http://arxiv.org/abs/1709.08005
Autor:
Mignani, Roberto P., Paladino, Rosita, Rudak, Bronek, Zajczyk, Anna, Corongiu, Alessandro, de Luca, Andrea, Hummel, Wolfgang, Possenti, Andrea, Geppert, Ulrich, Burgay, Marta, Marconi, Gianni
Pulsars are neutron stars, stellar corpses left over after supernova explosions of stars about ten times as massive as our Sun, with densities comparable to the atomic nucleus', spinning with periods from few milliseconds up to few seconds, and endow
Externí odkaz:
http://arxiv.org/abs/1708.02828
Autor:
Szary, Andrzej, Gil, Janusz, Zhang, Bing, Haberl, Frank, Melikidze, George I., Geppert, Ulrich, Mitra, Dipanjan, Xu, Ren-Xin
We constrain the X-ray properties of the nearby $(360\,{\rm pc})$, old ($5\,{\rm Myr}$) pulsar B1133+16 with $\sim 100\,{\rm ks}$ effective exposure time by {\it XMM-Newton}. The observed pulsar flux in the 0.2-3 keV energy range is $\sim 10^{-14} \,
Externí odkaz:
http://arxiv.org/abs/1701.02554
A precondition for the radio emission of pulsars is the existence of strong, small-scale magnetic field structures (`magnetic spots') in the polar cap region. Their creation can proceed via crustal Hall drift out of two qualitatively and quantitative
Externí odkaz:
http://arxiv.org/abs/1604.04305
Publikováno v:
Advances in Space Research, Volume 56, Issue 1, pp. 71-84, 2015
The widespread use of metallic structures in space technology brings risk of degradation which occurs under space conditions. New types of materials dedicated for space applications, that have been developed in the last decade, are in majority not we
Externí odkaz:
http://arxiv.org/abs/1506.01790
Publikováno v:
Journal of Materials Science and Engineering A4(1),(2014),1-9
All material exposed to interplanetary space conditions are subject to degradation processes. For obvious reasons there is a great interest to study these processes for materials that are used in satellite construction. However, also the influence of
Externí odkaz:
http://arxiv.org/abs/1407.6238
Publikováno v:
Advances in Space Research 52, 1993-2005, 2013
This paper describes the construction and performance of a VUV-simulator that has been designed to study degradation of materials under space conditions. It is part of the Complex Irradiation Facility at DLR in Bremen, Germany, that has been built fo
Externí odkaz:
http://arxiv.org/abs/1406.1607
Autor:
Sznajder, Maciej, Geppert, Ulrich
Metals are the most common materials used in space technology. Metal structures, while used in space, are subjected to the full spectrum of the electromagnetic radiation together with particle irradiation. Hence, they undergo degradation. Future spac
Externí odkaz:
http://arxiv.org/abs/1405.7186
Publikováno v:
Astronomy & Astrophysics, 547 (2012) A9
(Abridged) The rotational evolution of isolated neutron stars is dominated by the magnetic field anchored to the solid crust of the star. Assuming that the core field evolves on much longer timescales, the crustal field evolves mainly though Ohmic di
Externí odkaz:
http://arxiv.org/abs/1209.2273