Zobrazeno 1 - 10
of 179
pro vyhledávání: '"Dorch, S. B. F."'
Autor:
Ellegaard, O., Dorch, S. B. F.
Publikováno v:
Journal of Astronomical History and Heritage (2022), 25(1), 91
For decades, perhaps even centuries, the exchange of publications between observatories was the most important source of information on new astronomical results, either in the form of observational data or new scientific theories. In particular, smal
Externí odkaz:
http://arxiv.org/abs/2205.08386
Autor:
Dorch, S. B. F., Petersen, J. O.
Publikováno v:
Journal of Astronomical History and Heritage (2021), 24(4), 1090
About fifty years after the work that astronomer Tycho Brahe carried out while living on the island of Hven had made him world famous, King Christian IV of Denmark built the Trinity Buildings in Copenhagen. The Tower observatory was opened in 1642, a
Externí odkaz:
http://arxiv.org/abs/2201.01054
Autor:
Ellegaard, O., Dorch, S. B. F.
Publikováno v:
Proceedings of the International Astronomical Union, 2021, vol. 15(S367), p. 487-488
Observatory publications comprise the work of local astronomers from observatories around the world and are traditionally exchanged between observatories through libraries. However, large collections of observatory publications seem to be rare; or at
Externí odkaz:
http://arxiv.org/abs/2104.12838
We present here evidence for the existence of a citation advantage within astrophysics for papers that link to data. Using simple measures based on publication data from NASA Astrophysics Data System we find a citation advantage for papers with links
Externí odkaz:
http://arxiv.org/abs/1511.02512
Autor:
Dorch, S. B. F.
Publikováno v:
A&A 461, 325-330 (2007)
Context: The context of this paper is buoyant toroidal magnetic flux ropes, which is a part of flux tube dynamo theory and the framework of solar-like magnetic activity. Aims: The aim is to investigate how twisted magnetic flux ropes interact with a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0609630
Magnetic activity in M-dwarfs present enigmatic questions: On the one hand they have higher field strengths and larger filling factors than the magnetic field on the Sun, on the other hand, they are fully convective and their atmospheres are more neu
Externí odkaz:
http://arxiv.org/abs/astro-ph/0409219
Autor:
Dorch, S. B. F.
Recent numerical MHD simulations suggest that magnetic activity may occur in late-type giants. A entire red supergiant with stellar parameters equal to Betelgeuse was modelled in 3d with the high-order "Pencil Code". Linear kinematic and non-linear s
Externí odkaz:
http://arxiv.org/abs/astro-ph/0409192
Autor:
Dorch, S. B. F., Archontis, V. D.
Publikováno v:
Solar Physics, October 2004, Volume 224, Issue 1, pp 171-178
In the context of astrophysical dynamos we illustrate that the no-cosines flow, with zero mean helicity, can drive fast dynamo action and study the dynamo's mode of operation during both the linear and non-linear saturation regime: It turns out that
Externí odkaz:
http://arxiv.org/abs/astro-ph/0409193
Autor:
Dorch, S. B. F.
Publikováno v:
Astron.Astrophys. 423 (2004) 1101-1107
Evidence is presented from numerical magneto-hydrodynamical simulations for the existence of magnetic activity in late-type giant stars. A red supergiant with stellar parameters similar to that of Betelgeuse (alpha Orionis) is modeled as a "star-in-a
Externí odkaz:
http://arxiv.org/abs/astro-ph/0403321
Autor:
Dorch, S. B. F.
Betelgeuse is an example of a cool super-giant displaying brightness fluctuations and irregular surface structures. Simulations by Freytag et al. (2002) of the convective envelope of the star have shown that the fluctuations in the star's luminosity
Externí odkaz:
http://arxiv.org/abs/astro-ph/0310279