Skip to main content
title

Past Colloquia

The Connection between Binarity and Large-Scale Magnetic Fields in Hot, Massive Stars

Cody Hall

Jason Grunhut (Dunlap Institute)

October 28, 2016
14:00 - 15:00

Ordered magnetic fields are found in a variety of astrophysical objects, ranging from planets to Galaxies and beyond. While the details are not fully understood, magnetic fields in most objects are the result of dynamo processes that convert bulk mechanical motion into magnetic energy. Unlike…

Read More »

Science Prospects with the Current and Future Network of Gravitational Wave Detectors

Cody Hall

Frédérique Marion (Laboratoire d'Annecy-le-Vieux de physique des particules (LAPP), CNRS)

October 21, 2016
14:00 - 15:00

As the second generation of ground-based gravitational wave interferometric detectors has come live and observed the first signals from binary black hole mergers, future observing runs will keep collecting data at unprecedented sensitivities, with an expanding network of detectors. The talk will discuss the plans…

Read More »

Peculiar Transients as Probes of Stellar Evolution and Mass Loss

Cody Hall

Maria Drout (The Carnegie Observatories/Dunlap Institute)

October 14, 2016
14:00 - 15:00

The recent advent of wide-field time-domain surveys has launched an upheaval in field of stellar evolution. These surveys are uncovering new types of astronomical transients that not only challenge existing models for supernova explosions but also our understanding of what physical processes can occur during…

Read More »

Gravitational Wave Observations: Status and Future Planning

Cody Hall

Sheila Rowan (University of Glasgow)

October 07, 2016
14:00 - 15:00

In September 2015 the twin ‘Advanced LIGO’ observatories allowed the first direct detection of gravitational waves from astrophysical sources. The waves detected originated from the collision and merger of two black holes 1.3 billion light years from earth. This detection marked the start of new…

Read More »

Exoplanets Hidden by Stellar Activity

Cody Hall

Elodie Hebrard (York University)

September 30, 2016
14:00 - 15:00

The detection extra-solar planets through radial-velocity searches is likely limited by the intrinsic magnetic activity of the host stars. The correlated « noise » that arises from their natural radial-velocity variability (jitter) can easily mimic and hide the orbital signals of super-Earth and Earth-mass exoplanets,…

Read More »

Mapping Hot Gas in the Universe using the Sunyaev-Zeldovich effect

Cody Hall

Eiichiro Komatsu (Max-Planck-Institut für Astrophysik, Germany)

September 23, 2016
14:00 - 15:00

Hot, thermal electrons in galaxy clusters up-scatter the cosmic microwave background photons, making clusters visible in the microwave sky. This effect, known as the Sunyaev-Zeldovich effect, has been detected routinely toward individual galaxy clusters. Since the SZ effect is proportional to a projected thermal pressure…

Read More »

A UV to Far-IR Spectroscopic view of Shocks and Turbulence in Dense Galaxy Environments: From Stephan’s Quintet to Proto-clouds at z = 10

Cody Hall

Dr. Phil Appleton, NASA Herschel Science Center, IPAC, Caltech

June 24, 2016
14:00 - 15:00

Abstract: One interesting result from the cryogenic mission of the Spitzer Space telescope was the discovery of a class of extragalactic sources that exhibited powerful warm molecular hydrogen lines that are likely caused by powerful shocks and turbulence.  One example is the massive group-wide warm H2…

Read More »

Juno: Revealing Jupiter’s Interior” – NASA’s Juno Mission to Jupiter: What’s Inside the Giant Planet?

Cody Hall

Fran Bagenal (University of Colorado) Keynote Lecturer

June 17, 2016
14:00 - 15:00

Juno’s principal goal is to understand the origin and evolution of Jupiter. Underneath its dense cloud cover, Jupiter safeguards secrets to the fundamental processes and conditions that governed our solar system during its formation. As our primary example of a giant planet, Jupiter can also provide critical knowledge for…

Read More »

Early Reionization Science from 21 cm Experiments and the Path Towards a New Cosmological Probe

Cody Hall

Jonathan Pober (Brown University)

June 10, 2016
14:00 - 15:00

Abstract: 21 cm cosmology — the concept of using radio telescopes to observe the highly redshifted 21 cm line of neutral hydrogen on cosmological scales — is a field on the verge of a breakthrough.   The technique is faced with the significant challenge of recovering…

Read More »

The Impact of Stellar Feedback on Molecular Clouds

Cody Hall

Stella Offner (University of Massachusetts)

June 03, 2016
14:00 - 15:00

Low-mass stars influence their surroundings through a variety of feedback processes. However, because they are less energetic than high-mass stars, their contributions are often ignored. In this talk, I will discuss numerical simulations including protostellar outflows and winds from main sequence B-type stars. I will…

Read More »