Astrophysics Seminars

I will give a tour through a variety of results on how precision cosmological data can test for the consequences of a light scalar in the early universe, such as an axion or a curvaton. Observable consequences could include altered CMB peak...

While observations of extra-solar protoplanetary disks have been improving by leaps and bounds, they still cannot probe the early stages of planet formation. The best data we have for the sub-micron to cm phase of the planet formation process, which...

Internal stellar magnetic fields are inaccessible to direct observations and little is known about their amplitude, geometry and evolution. I will discuss how strong magnetic fields in the cores of red giant stars can be identified with...

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TITLE & ABSTRACT ADDED - Numerical simulations have played a crucial role in the development of modern cosmology and in the establishment of LCDM. In this talk, I will review the main results and the fundamental assumptions behind dark matter...

The membrane paradigm gives an alternate description of black hole physics, in which the black hole is replaced by a fluid membrane living on the horizon. In asymptotically flat spacetimes, the boundary at null infinity also has a membrane...

Neutron stars live interesting and mysterious lives: from the moment they are created in core-collapse supernovae, to the moment some of them collapse to black-holes. In this talk, I will cover some aspects of their lives. I will discuss their birth...