Astrophysics Seminars

Observations of high-redshift 21cm brightness temperature fluctuations are challenging but can potentially provide unprecedented information about the early universe. In particular, they are the only direct probe of large-scale structure during the...

I will review recent advances in the modeling of galaxy bias in the context of galaxy evolution. The connection between galaxies and dark matter halos contains significant information for understanding how galaxies form and evolve. I will focus on...

Accurate measurements of H0 - the current expansion rate of the Universe, provide critical independent constraints on dark energy, spatial curvature of the Universe, neutrino physics, and validity of general relativity. The recent Planck results...

Construction and commissioning of the cubic-kilometer IceCube neutrino detector and its low energy extension DeepCore have been completed. The instrument detects neutrinos over a wide energy range: from 10 GeV atmospheric neutrinos to 1010 GeV...

ABSTRACT: A hierarchy of atmospheric models of increasing complexity is essential to attempts at understanding the Earth's climate and future climate change. Some examples of elements of this hierarchy and examples of their use will be provided...

ABSTRACT: Magnetic reconnection is a phenomenon of nature in which magnetic field lines change their topology in plasma and convert magnetic energy to particles by acceleration and heating. It is one of the most fundamental processes at work in...

ABSTRACT: Neutral atomic hydrogen is by far the most abundant element in galaxies. Although reasonably complete images of the HI sky exist out to redshifts of 0.08, we know surprisingly little about the HI properties of galaxies at larger...

ABSTRACT: Recent lessons learned from exploring bulk compositions and atmospheres of solid planets and the prospects to connect them to experiments in alternative biochemistries.