Zobrazeno 1 - 10
of 361
pro vyhledávání: '"Dehnen W"'
Autor:
Read, J. I., Mamon, G. A., Vasiliev, E., Watkins, L. L., Walker, M. G., Penarrubia, J., Wilkinson, M., Dehnen, W., Das, P.
We apply four different mass modelling methods to a suite of publicly available mock data for spherical stellar systems. We focus on the recovery of the density and velocity anisotropy as a function of radius, using either line-of-sight velocity data
Externí odkaz:
http://arxiv.org/abs/2011.09493
Publikováno v:
EPJ Web of Conferences, Vol 19, p 07002 (2012)
Disc non-axisymmetric components, such as spirals and central bars, are nowadays known to play an important role in shaping galactic discs. Here we use Tree-SPH N-body simulations to examine the effect of these perturbers on two aspects: the occurren
Externí odkaz:
https://doaj.org/article/c7f1c59712a64213abb24561ad4e3c79
Autor:
Torrealba, G., Belokurov, V., Koposov, S. E., Li, T. S., Walker, M. G., Sanders, J. L., Geringer-Sameth, A., Zucker, D. B., Kuehn, K., Evans, N. W., Dehnen, W.
We report the discovery of a Milky Way satellite in the constellation of Antlia. The Antlia 2 dwarf galaxy is located behind the Galactic disc at a latitude of $b\sim 11^{\circ}$ and spans $1.26$ degrees, which corresponds to $\sim2.9$ kpc at its dis
Externí odkaz:
http://arxiv.org/abs/1811.04082
Akademický článek
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We show that, provided the principal axes of the second velocity moment tensor of a stellar population are generally unequal and are oriented perpendicular to a set of orthogonal surfaces at each point, then those surfaces must be confocal quadric su
Externí odkaz:
http://arxiv.org/abs/1509.08794
The Kepler mission has recently discovered a number of exoplanetary systems, such as Kepler-11 and Kepler-32, in which ensembles of several planets are found in very closely packed orbits (often within a few percent of an AU of one another). These co
Externí odkaz:
http://arxiv.org/abs/1409.0532
Autor:
Antoja, T., Helmi, A., Dehnen, W., Bienayme, O., Bland-Hawthorn, J., Famaey, B., Freeman, K., Gibson, B. K., Gilmore, G., Grebel, E. K., Kordopatis, G., Kunder, A., Minchev, I., Munari, U., Navarro, J., Parker, Q., Reid, W. A., Seabroke, G., Siebert, A., Steinmetz, M., Watson, F., Wyse, R. F. G., Zwitter, T.
Non-axisymmetries in the Galactic potential (spiral arms and bar) induce kinematic groups such as the Hercules stream. Assuming that Hercules is caused by the effects of the Outer Lindblad Resonance of the Galactic bar, we model analytically its prop
Externí odkaz:
http://arxiv.org/abs/1309.4272
Non-axisymmetric components, such as spirals and central bars, play a major role in shaping galactic discs. An important aspect of the disc secular evolution driven by these perturbers is the radial migration of stars. It has been suggested recently
Externí odkaz:
http://arxiv.org/abs/1205.6475
The chemodynamical evolution of spherical multi-component self-gravitating models for isolated dwarf galaxies is studied. We compare their evolution with and without feedback effects from star formation processes. We find that initially cuspy dark ma
Externí odkaz:
http://arxiv.org/abs/1002.1085
We re-examine the stellar kinematics of the Solar neighbourhood in terms of the velocity of the Sun with respect to the local standard of rest. We show that the classical determination of its component V_sun in the direction of Galactic rotation via
Externí odkaz:
http://arxiv.org/abs/0912.3693