Zobrazeno 1 - 10
of 66
pro vyhledávání: '"Oser, Ludwig"'
Autor:
Núñez, Alejandro, Ostriker, Jeremiah P., Naab, Thorsten, Oser, Ludwig, Hu, Chia-Yu, Choi, Ena
Various heuristic approaches to model unresolved supernova (SN) feedback in galaxy formation simulations exist to reproduce the formation of spiral galaxies and the overall inefficient conversion of gas into stars. Some models, however, require resol
Externí odkaz:
http://arxiv.org/abs/1701.01082
Autor:
Choi, Ena, Ostriker, Jeremiah P., Naab, Thorsten, Somerville, Rachel S., Hirschmann, Michaela, Núñez, Alejandro, Hu, Chia-Yu, Oser, Ludwig
We ask how the inclusion of various physical heating processes due to the metal content of gas affect the evolution of massive galaxies and compute a suite of cosmological hydrodynamical simulations that follow these systems and their supermassive bl
Externí odkaz:
http://arxiv.org/abs/1610.09389
Autor:
Hirschmann, Michaela, Naab, Thorsten, Ostriker, Jeremiah P., Forbes, Duncan A., Duc, Pierre-Alain, Davé, Romeel, Oser, Ludwig, Karabal, Emin
We investigate the evolution of stellar population gradients from $z=2$ to $z=0$ in massive galaxies at large radii ($r > 2R_{\mathrm{eff}}$) using ten cosmological zoom simulations of halos with $6 \times 10^{12} M_{\odot} < M_{\mathrm{halo}} < 2 \t
Externí odkaz:
http://arxiv.org/abs/1410.2244
Publikováno v:
2014MNRAS.445.1065R
We analyze orbits of stars and dark matter out to three effective radii for 42 galaxies formed in cosmological zoom simulations. Box orbits always dominate at the centers and $z$-tubes become important at larger radii. We connect the orbital structur
Externí odkaz:
http://arxiv.org/abs/1406.6696
Autor:
Übler, Hannah, Naab, Thorsten, Oser, Ludwig, Aumer, Michael, Sales, Laura V., White, Simon D. M.
We study how feedback influences baryon infall onto galaxies using cosmological, zoom-in simulations of haloes with present mass $M_{vir}=6.9\times10^{11} M_{\odot}$ to $1.7\times10^{12} M_{\odot}$. Starting at z=4 from identical initial conditions,
Externí odkaz:
http://arxiv.org/abs/1403.6124
We employ cosmological hydrodynamical simulations to investigate the effects of AGN feedback on the formation of massive galaxies with present-day stellar masses of $M_{stel} = 8.8 \times 10^{10} - 6.0 \times 10^{11} M_{sun}$. Using smoothed particle
Externí odkaz:
http://arxiv.org/abs/1403.1257
We present the smoothed-particle hydrodynamics implementation SPHGal, which combines some recently proposed improvements in GADGET. This includes a pressure-entropy formulation with a Wendland kernel, a higher order estimate of velocity gradients, a
Externí odkaz:
http://arxiv.org/abs/1402.1788
Autor:
Serra, Paolo, Oser, Ludwig, Krajnovic, Davor, Naab, Thorsten, Oosterloo, Tom, Morganti, Raffaella, Cappellari, Michele, Emsellem, Eric, Young, Lisa M., Blitz, Leo, Davis, Timothy A., Duc, Pierre-Alain, Hirschmann, Michaela, Weijmans, Anne-Marie, Alatalo, Katherine, Bayet, Estelle, Bois, Maxime, Bournaud, Frederic, Bureau, Martin, Davies, Roger L., de Zeeuw, P. T., Khochfar, Sadegh, Kuntschner, Harald, Lablanche, Pierre-Yves, McDermid, Richard M., Sarzi, Marc, Scott, Nicholas
One quarter of all nearby early-type galaxies (ETGs) outside Virgo host a disc/ring of HI with size from a few to tens of kpc and mass up to ~1e+9 solar masses. Here we investigate whether this HI is related to the presence of a stellar disc within t
Externí odkaz:
http://arxiv.org/abs/1401.3180
Autor:
Hirschmann, Michaela, Naab, Thorsten, Dave, Romeel, Oppenheimer, Benjamin D., Ostriker, Jeremiah P., Somerville, Rachel S., Oser, Ludwig, Genzel, Reinhard, Tacconi, Linda J., Foerster-Schreiber, Natascha M., Burkert, Andreas, Genel, Shy
We investigate the differential effects of metal cooling and galactic stellar winds on the cosmological formation of individual galaxies with three sets of cosmological, hydrodynamical zoom simulations of 45 halos in the mass range 10^11
Externí odkaz:
http://arxiv.org/abs/1309.2946
Autor:
Remus, Rhea-Silvia, Burkert, Andreas, Dolag, Klaus, Johansson, Peter H., Naab, Thorsten, Oser, Ludwig, Thomas, Jens
Publikováno v:
ApJ 766, 71 (2013)
Dynamical modeling and strong lensing data indicate that the total density profiles of early-type galaxies are close to isothermal, i.e., rho_tot ~ r^gamma with gamma approx -2. To understand the origin of this universal slope we study a set of simul
Externí odkaz:
http://arxiv.org/abs/1211.3420