Quasars

Recent Articles

• Resolving Gas Dynamics in the Circumnuclear Region of a Disk Galaxy in a Cosmological Simulation

  December 3, 2007 in General

  • 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…

• Monolithic or hierarchical star formation? A new statistical analysis

  December 3, 2007 in Paper

  • 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…

• Star-formation in the HI bridge between M81 and M82

  November 20, 2007 in Paper

  • 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…

• The MW is an exceptionnally quiet galaxy: implications for spiral formation

  November 20, 2007 in Paper

  • 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.

• The Polarization of Scattered Lyman Alpha Radiation Around High-Redshift Galaxies

  November 20, 2007 in Paper

  • 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