Mathematics – Logic
Scientific paper
Jun 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aipc.1240..199c&link_type=abstract
HUNTING FOR THE DARK: THE HIDDEN SIDE OF GALAXY FORMATION. Edited by Victor P. Debattista and Cristina C. Popescu AIP Conferen
Mathematics
Logic
Red Shift, Star Formation, Gravitation, Dark Matter, Stellar Mass, Distances, Redshifts, Radial Velocities, Spatial Distribution Of Galaxies, Star Formation, Relativity And Gravitation, Dark Matter, Masses
Scientific paper
We present cosmological simulations that recover the fragmentation of high-redshift galactic discs driven by cold streams. The fragmentation is recovered owing to an AMR resolution better than 70 pc with cooling below 104 K. We study three typical star-forming galaxies in haloes of ~5×1011 Msolar at z~=2.3. The steady gas supply by cold streams leads to gravitationally unstable, turbulent discs, which fragment into giant clumps and transient features on a dynamical timescale. Clump migration and angular-momentum transfer on an orbital timescale help the growth of a central bulge with a mass comparable to the disc. The continuous gas input keeps the system of clumpy disc and bulge in a near steady state for several Gyr. The simulated galaxies resemble in many ways the observed star-forming galaxies at high redshift.
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