Articles by Thomas Marquart

• Levine et al.
• http://arxiv.org/abs/0711.3478
• Simulation with high dynamic range (1E7) down to 0.1pc, i.e. to the accretion disk of a SMBH.
• Global instabilities make things quasi-stable locally due to turbulence.
• An exponential density profile for the gas in a disk arises naturally due to this.

• Kampakoglou et al.
• http://arxiv.org/abs/0709.1104
• Statistical model to predict/fit the star formation history of the universe. Hierarchical formation through merging seems to be favoured but not enough to exclude the monolithic scenario. Outflow models and dust are critical.

My impression is that the two priciple modes of galaxy formation seem to be subject to fashion among astronomers. While monolithic has been favoured in the early days of extragalacitc astronomy, the hierarchical formation was preferred until lately when it was realised that the former probably also plays a role.

• de Mello et al.
• http://arxiv.org/abs/0711.2685
• They found both old and young stars in the region between the two galaxies and conclude that the former were flung out of either of the two while the latter have formed in the tidal tail.
• Overall, there seems to be quite little going on there compared to other tidal tails (e.g. of mergers) where active star formation is often seen.

• Puech et al.
• http://arxiv.org/abs/0711.2881
• Conference proceeding on how the MW is special in the sense that it forms little stars and therefore cannot have undergone a merger for a long time.

• Dijkstra et al.
• http://arxiv.org/abs/0711.2312
• numerical study of how LyA photons scatter and become polarizes
• difference for infall and outflow of gas
• polarimetric measurements proposed

• Yang et al.
• http://arxiv.org/abs/0711.2305
• large project with the IFU-mode of FLAMES at the VLT.
• z=1 galaxies show more frequently “strange” kinematics than locally.

Here and here. Funny as usual.