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Assessing the Standard Cosmological Model

Assessing the Standard Cosmological Model

by jsureshcfa | Apr 11, 2011 | Daily Paper Summaries

The standard model of cosmology is simple, elegant, and very successful. How do we tell that whether our model is doing well? And what phenomena does it still have trouble explaining?

Supermassive Black Holes and Galaxy Mergers

Supermassive Black Holes and Galaxy Mergers

by jsureshcfa | Mar 28, 2011 | Daily Paper Summaries

When galaxies merge, the super-massive black holes at their center can merge as well. General relativity predicts that the newly merged black hole can, in forming, be kicked with a large velocity out of the galactic center!

Planet Formation at Wide Orbits through Gravitational Instability

Planet Formation at Wide Orbits through Gravitational Instability

by jsureshcfa | Feb 28, 2011 | Daily Paper Summaries

Gravity can induce global instabilities in disks around stars, which then collapse to form planets at different radii.

Stellar Black Holes at the Dawn of the Universe

Stellar Black Holes at the Dawn of the Universe

by jsureshcfa | Feb 15, 2011 | Daily Paper Summaries

Today’s authors propose that, in addition to the first stars, the first stellar black holes might have contributed significantly to the period of cosmic reionization.

Magnetic Fields and Gravitational Collapse

Magnetic Fields and Gravitational Collapse

by jsureshcfa | Feb 7, 2011 | Daily Paper Summaries

Magnetic fields can get hugely amplified when gas clouds gravitationally collapse. The authors of this paper explore gravitational collapse using MHD simulations and argue for a new resolution requirement in order to properly resolve magnetic dynamo action on small scales.

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