Astrophysics Seminars

The Atacama Cosmology Telescope (ACT) has mapped the microwave sky to arcminute scales. Efficient map-making and spectrum-estimation techniques allow us to probe the acoustic peaks deep into the damping tail, and allow for confirmation of the...

ABSTRACT: Clusters of Galaxies are the largest gravitationally-bound objects in the Universe. They form via mergers with energetics that are only rivaled by the Big Bang. The study of these objects and collisions can reveal the complex processes...

ABSTRACT: Large scale magnetic fields are found everywhere in the universe, from the scales of planets to galactic disks (or larger). Understanding their generation and maintenance has proven to be unexpectedly difficult. I will discuss topological...

The properties of the Supernovae discovered in coincidence with long-duration Gamma-ray Bursts will be reviewed, and compared to those of Supernovae for which GRBs are not observed. The SNe associated with GRBs are of Type Ic. They are brighter than...

ABSTRACT: Echelle observations can be used as an independent means of probing the dust extinction of SNe Ia. I show that the extinction of the objects where the diffuse interstellar band at 5780 Angstroms is detected is consistent with the visual...

ABSTRACT: Wide area surveys in mm/submm-wave (SPT, Herschel, ACT, Planck) have discovered a large population of strongly lensed, dusty, star-forming galaxies (DSFGs) at very high redshifts (2

ABSTRACT: Quasicrystals are exotic materials that have symmetries that were once thought to be impossible for matter. The first known examples were synthesized in the laboratory 30 years ago, but could Nature have beaten us to the punch? This talk...

One century after the pioneering discovery of cosmic rays by V. Hess, the present generation of X- and gamma-ray telescopes is finally unravelling the origin of extraterrestrial particles with energies up to 10^8 GeV, which are thought to be...