http://apparentbrightness.net astronomy and stuff Mon, 03 Dec 2007 16:07:54 +0000 en hourly 1 http://wordpress.org/?v=3.0.1 http://apparentbrightness.net/2007/12/03/resolving-gas-dynamics-in-the-circumnuclear-region-of-a-disk-galaxy-in-a-cosmological-simulation/ http://apparentbrightness.net/2007/12/03/resolving-gas-dynamics-in-the-circumnuclear-region-of-a-disk-galaxy-in-a-cosmological-simulation/#comments Mon, 03 Dec 2007 16:07:54 +0000 Thomas http://apparentbrightness.net/2007/12/03/resolving-gas-dynamics-in-the-circumnuclear-region-of-a-disk-galaxy-in-a-cosmological-simulation/

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.

]]> http://apparentbrightness.net/2007/12/03/resolving-gas-dynamics-in-the-circumnuclear-region-of-a-disk-galaxy-in-a-cosmological-simulation/feed/ 0 http://apparentbrightness.net/2007/11/13/wide-field-survey-of-globular-clusters-in-m31-ii-kinematics-of-the-globular-cluster-system/ http://apparentbrightness.net/2007/11/13/wide-field-survey-of-globular-clusters-in-m31-ii-kinematics-of-the-globular-cluster-system/#comments Tue, 13 Nov 2007 08:33:25 +0000 Thomas http://apparentbrightness.net/2007/11/13/wide-field-survey-of-globular-clusters-in-m31-ii-kinematics-of-the-globular-cluster-system/

Lee at al.

http://arxiv.org/abs/0711.1232

The GCs around Andromeda rotate.

• GCs can be “friendless”, meaning they have no neighbors with similar kinematics. In addition they look at various subsamples depending e.g. on metallicity and brightness.

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