Astrophysics Seminars

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...

I will discuss several problems in (exo)planetary dynamics, all involving somewhat surprising behaviors of vectors tugging one another. (1) Binary-disk-star interaction leading to the formation of misaligned protoplanetary disks; (2) Gentle...

This talk explains the formation of galaxies of different morphological types (aka the Hubble Sequence): spirals vs ellipticals, disks vs spheroids. The talk includes theory, observation, and simulation, and is aimed at a general astrophysics...

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