Department Events


The Era of Large-Scale Cosmological Simulations

Mon, May 4, 2015 at 12:00 pm

131A Campbell Hall

Mark Vogelsberger (MIT)

Progress in our understanding of galaxy formation, improved numerical algorithms, and increased computing power have recently lead to a number of impressive large-scale hydrodynamical simulations, which are able to reproduce key observables of the local and higher redshift Universe. These simulations allow us, for the first time, to study the interplay between large-scale structure and galaxy …

More about The Era of Large-Scale Cosmological Simulations

Black Holes in Low Mass Galaxies

Mon, May 11, 2015 at 12:00 pm

131A Campbell Hall

Anil Seth (University of Utah)

Supermassive black holes are ubiquitous in massive galaxies, but it remains unclear how many sub-Milky Way mass galaxies host black holes.  The demographics of black holes in lower mass galaxies provide the only currently observable test of how supermassive black hole form in the early universe.  I will discuss my work to find and measure the mass of black holes in lower mass …

More about Black Holes in Low Mass Galaxies

Giant Planets: Hulks and Banners

Thu, Apr 30, 2015 at 4:00 pm

1 LeConte Hall

Ruth Murray-Clay (UC Santa Barbara)

Giant planets form the dynamical backbones of planetary systems, muscling aside their lower-mass neighbors while advertising their systems’ formation histories.  Recent discoveries of super-Earths on short period orbits and giant planets at wide separations have turned several classic questions of planet formation on their heads.  Instead of merely asking how giants planets …

More about Giant Planets: Hulks and Banners

Department Lunch 4/30

Thu, Apr 30, 2015 at 12:30 pm

131 Campbell Hall

Dyas Utomo (UC Berkeley)
Davide Martizzi (UC Berkeley)
Ruth Murray-Clay (UCSB; colloq. speaker)

Dyas Utomo (UC Berkeley) "EDGE: a CARMA Extragalactic Legacy Survey" Davide Martizzi (UC Berkeley) “Is the formation of galaxy clusters in cosmological simulations a solved problem?" Ruth Murray-Clay (UCSB; colloq. speaker) "A unified procedure for calculating thermal atmospheric escape."

More about Department Lunch 4/30

Magnetic Fields at Low Temperatures: Cool Stars, Brown Dwarfs, and (Eventually) Exoplanets

Wed, Apr 29, 2015 at 1:10 pm

131B Campbell Hall

Peter Williams (Harvard CfA)

The magnetic field of Earth protects its surface from cosmic rays and the solar wind, while that of Jupiter enables powerful aurorae that can be brighter than the Sun at long radio wavelengths. What are the magnetic fields of extrasolar planets like? While direct observational probes are not yet feasible, the groundwork for answering this question is being laid, with …

More about Magnetic Fields at Low Temperatures: Cool Stars, Brown Dwarfs, and (Eventually) Exoplanets

Galaxy evolution along the Cosmic Web

Tue, Apr 28, 2015 at 1:00 pm

131A Campbell Hall

Mehmet Alpaslan (Ames)

No galaxy is an island, and the evolutionary fate of these systems is often inextricably linked to their environment. This relationship is well understood at local scales; but what role do cosmic filaments play in the assembly of mass? Do galaxies in voids evolve differently to galaxies in clusters? These fundamental questions require not only detailed observations, but also thorough …

More about Galaxy evolution along the Cosmic Web

What Can Tidal Disruption Events Teach Us About Black Hole Accretion?

Mon, Apr 27, 2015 at 12:00 pm

131A Campbell Hall

Mitch Begelman (Colorado)

For a year or more after a star is tidally disrupted by a black hole, debris can fall back at a rate that greatly exceeds the Eddington limit.   Both observations and theoretical arguments indicate that mass loss is unable to regulate the rate at which matter is actually swallowed by the hole, leading to black hole growth rates and energy outputs that can exceed the Eddington limit …

More about What Can Tidal Disruption Events Teach Us About Black Hole Accretion?

View Archive