Zobrazeno 1 - 10
of 62
pro vyhledávání: '"Aumer, Michael"'
We analyse disc heating and radial migration in N-body models of growing disc galaxies with thick and thin discs. Similar to thin-disc-only models, galaxies with appropriate non-axisymmetric structures reproduce observational constraints on radial di
Externí odkaz:
http://arxiv.org/abs/1706.04042
Autor:
Aumer, Michael, Binney, James
We perform controlled N-body simulations of disc galaxies growing within live dark matter (DM) haloes to present-day galaxies that contain both thin and thick discs. We consider two types of models: a) thick-disc initial conditions to which stars on
Externí odkaz:
http://arxiv.org/abs/1705.09240
Autor:
Schönrich, Ralph, Aumer, Michael
We apply the statistical methods by Schoenrich, Binney & Asplund to assess the quality of distances and kinematics in the RAVE-TGAS and LAMOST-TGAS samples of Solar neighbourhood stars. These methods yield a nominal distance accuracy of 1-2%. Other t
Externí odkaz:
http://arxiv.org/abs/1704.01333
We analyse the heating of stellar discs by non axisymmetric structures and giant molecular clouds (GMCs) in N-body simulations of growing disc galaxies. The analysis resolves long-standing discrepancies between models and data by demonstrating the im
Externí odkaz:
http://arxiv.org/abs/1607.01972
We perform a series of controlled N-body simulations of growing disc galaxies within non-growing, live dark matter haloes of varying mass and concentration. Our initial conditions include either a low-mass disc or a compact bulge. New stellar particl
Externí odkaz:
http://arxiv.org/abs/1604.00191
We report the detection of the Galactic nuclear disc in line-of-sight kinematics of stars, measured with infrared spectroscopy from APOGEE. This stellar component of the nuclear disc has an extent and rotation velocity V ~ 120kms comparable to the ga
Externí odkaz:
http://arxiv.org/abs/1507.02695
Autor:
Aumer, Michael, Schönrich, Ralph
We analyse a controlled N-body + smoothed particle hydrodynamics simulation of a growing disc galaxy within a non-growing, live dark halo. The disc is continuously fed with gas and star particles on near-circular orbits and develops a bar comparable
Externí odkaz:
http://arxiv.org/abs/1507.00907
We analyze the formation histories of 19 galaxies from cosmological smoothed particle hydrodynamics zoom-in resimulations. We construct mock three-colour images and show that the models reproduce observed trends in the evolution of galaxy colours and
Externí odkaz:
http://arxiv.org/abs/1404.6926
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
Autor:
Wang, Jing, Fu, Jian, Aumer, Michael, Kauffmann, Guinevere, Józsa, Gyula I. G., Serra, Paolo, Huang, Mei-ling, Brinchmann, Jarle, van der Hulst, Thijs, Bigiel, Frank
We analyze the radial distribution of HI gas for 23 disk galaxies with unusually high HI content from the Bluedisk sample, along with a similar-sized sample of "normal" galaxies. We propose an empirical model to fit the radial profile of the HI surfa
Externí odkaz:
http://arxiv.org/abs/1401.8164