Zobrazeno 1 - 10
of 48
pro vyhledávání: '"Goerdt, Tobias"'
Publikováno v:
Mon. Not. Roy. Astron. Soc. 454 (2015) 637 - 648
We study the accretion along streams from the cosmic web into high-redshift massive galaxies using three sets of AMR hydro-cosmological simulations. We find that the streams keep a roughly constant accretion rate as they penetrate into the halo centr
Externí odkaz:
http://arxiv.org/abs/1505.01486
Autor:
Goerdt, Tobias, Ceverino, Daniel
Publikováno v:
Mon. Not. Roy. Astron. Soc. 450 (2015) 3359 - 3370
We study the velocities of the accretion along streams from the cosmic web into massive galaxies at high redshift with the help of three different suites of AMR hydrodynamical cosmological simulations. The results are compared to free-fall velocities
Externí odkaz:
http://arxiv.org/abs/1501.06913
Recent observations have shown that the majority of the Andromeda galaxy's satellites are aligned in a thin plane. On the theoretical side it has been proposed that galaxies acquire their gas via cold streams. In addition, numerical simulations show
Externí odkaz:
http://arxiv.org/abs/1307.2102
Publikováno v:
Mon. Not. Roy. Astron. Soc. 424 (2012) 2292 - 2315
Cold gas streaming along the dark-matter filaments of the cosmic web is predicted to be the major provider of resources for disc buildup, violent disk instability and star formation in massive galaxies in the early universe. We study to what extent t
Externí odkaz:
http://arxiv.org/abs/1205.2021
Publikováno v:
Mon.Not.Roy.Astron.Soc.407:613-631,2010
We use high-resolution cosmological hydrodynamical AMR simulations to predict the characteristics of La emission from the cold gas streams that fed galaxies in massive haloes at high redshift. The La luminosity in our simulations is powered by the re
Externí odkaz:
http://arxiv.org/abs/0911.5566
Publikováno v:
Astrophys.J.725:1707-1716,2010
We perform a detailed investigation into the disruption of central cusps via the transfer of energy from sinking massive objects. Constant density inner regions form at the radius where the enclosed mass approximately matches the mass of the infallin
Externí odkaz:
http://arxiv.org/abs/0806.1951
Autor:
Goerdt, Tobias, Moore, Ben, Kazantzidis, Stelios, Kaufmann, Tobias, Macciò, Andrea V., Stadel, Joachim
Publikováno v:
Mon.Not.Roy.Astron.Soc. 385 (2008) 2136-2142
Ultra compact dwarf galaxies (UCDs) have similar properties as massive globular clusters or the nuclei of nucleated galaxies. Recent observations suggesting a high dark matter content and a steep spatial distribution within groups and clusters provid
Externí odkaz:
http://arxiv.org/abs/0711.1162
Publikováno v:
Mon.Not.Roy.Astron.Soc.375:191-198,2007
If the dark matter particle is a neutralino then the first structures to form are cuspy cold dark matter (CDM) haloes collapsing after redshifts z ~ 100 in the mass range 10^{-6} - 10^{-3} Msun. We carry out a detailed study of the survival of these
Externí odkaz:
http://arxiv.org/abs/astro-ph/0608495
Publikováno v:
Mon.Not.Roy.Astron.Soc.373:1451-1460,2006
Using analytic calculations and N-body simulations we show that in constant density (harmonic) cores, sinking satellites undergo an initial phase of very rapid (super-Chandrasekhar) dynamical friction, after which they experience no dynamical frictio
Externí odkaz:
http://arxiv.org/abs/astro-ph/0606636
Publikováno v:
Mon.Not.Roy.Astron.Soc.368:1073-1077,2006
The dark matter dominated Fornax dwarf spheroidal has five globular clusters orbiting at ~1 kpc from its centre. In a cuspy CDM halo the globulars would sink to the centre from their current positions within a few Gyrs, presenting a puzzle as to why
Externí odkaz:
http://arxiv.org/abs/astro-ph/0601404