Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Fuchs, Burkhard"'
Autor:
Klement, Rainer J., Bailer-Jones, Coryn A. L., Fuchs, Burkhard, Rix, Hans-Walter, Smith, Kester W.
An efficient separation between dwarfs and giants in surveys of bright stars is important, especially for studies in which distances are estimated through photometric parallax relations. We use the available spectroscopic log g estimates from the sec
Externí odkaz:
http://arxiv.org/abs/1010.3697
Autor:
Wang, Hsiang-Hsu, Klessen, Ralf S., Dullemond, Cornelis P., Bosch, Frank C. van den, Fuchs, Burkhard
We present a new systematic way of setting up galactic gas disks based on the assumption of detailed hydrodynamic equilibrium. To do this, we need to specify the density distribution and the velocity field which supports the disk. We first show that
Externí odkaz:
http://arxiv.org/abs/1004.5593
Autor:
Lisker, Thorsten, Fuchs, Burkhard
Various early-type dwarf galaxies with disk features were identified in the Virgo cluster, including objects that display weak grand-design spiral arms despite being devoid of gas. Are these still related to the classical dEs, or are they a continuat
Externí odkaz:
http://arxiv.org/abs/0903.2474
Publikováno v:
Astrophys.J.685:261-271,2008
We searched for and detected stellar streams or moving groups in the solar neighbourhood, using the data provided by the 1st RAVE public data release. This analysis is based on distances to RAVE stars estimated from a color-magnitude relation that wa
Externí odkaz:
http://arxiv.org/abs/0805.2954
Galactic dark matter is modelled by a scalar field in order to effectively modify Kepler's law without changing standard Newtonian gravity. In particular, a solvable toy model with a self-interaction U(Phi) borrowed from non-topological solitons prod
Externí odkaz:
http://arxiv.org/abs/astro-ph/0608526
Publikováno v:
Mon.Not.Roy.Astron.Soc.372:1149-1160,2006
We measure the volume luminosity density and surface luminosity density generated by the Galactic disc, using accurate data on the local luminosity function and the disc's vertical structure. From the well measured volume mass density and surface mas
Externí odkaz:
http://arxiv.org/abs/astro-ph/0608193
Autor:
Fuchs, Burkhard, Phleps, Stefanie
Publikováno v:
New Astron. 11 (2006) 608-610
The general relativistic model of Cooperstock & Tieu, which attempts to fit rotation curves of spiral galaxies without invoking dark matter, is tested empirically using observations of the Milky Way. In particular, predictions for the mass density in
Externí odkaz:
http://arxiv.org/abs/astro-ph/0604022
Autor:
Fuchs, Burkhard
I discuss the dynamical interaction of galactic disks with the surrounding dark matter halos. In particular it is demonstrated that if the self-gravitating shearing sheet, a model of a patch of a galactic disk, is embedded in a live dark halo, this h
Externí odkaz:
http://arxiv.org/abs/astro-ph/0501050
Publikováno v:
Astron.Astrophys. 427 (2004) 95-100
We present decompositions of the rotation curves of three spiral galaxies at redshifts z~0.7 and 1 into contributions by their bulges, disks, and dark halos, respectively. In order to set constraints on the degeneracy of the decompositions we interpr
Externí odkaz:
http://arxiv.org/abs/astro-ph/0408072
Autor:
Demleitner, Markus, Fuchs, Burkhard
We examine the modes admitted by the Mestel disk, a disk with a globally flat rotation curve. In contrast to previous analyses of this problem by Zang (\cite{1976PhDT........26Z}) and Evans & Read (\cite{1998MNRAS.300...83E}, \cite{1998MNRAS.300..106
Externí odkaz:
http://arxiv.org/abs/astro-ph/0103091