Colloquia Schedule Fall 2014

Colloquia are on Tuesdays (unless otherwise indicated) at 3:30 pm in RLM 15.216B

Sep. 2

"Hot Chromospheres and Flares on Cool and Ultracool Dwarfs"


Sarah Jane Schmidt

Ohio State University

host: Adam Kraus

Sep. 9

"Let it Collide: An Epic Saga of Star Wars Planets, Planetesimals, and Super Planet Crashes"


Stefano Meschiari

University of Texas at Austin

host: Adam Kraus

Sep. 16

"The Complex Interplay between Star Formation and Galaxy Evolution from z~0-6"


Desika Narayanan

Haverford College

host: Steve Finkelstein

Sep. 23

"Compact Galaxies and Super-Massive Black Holes"


Remco van den Bosch

Max Planck Institute for Astronomy (MPIA), Heidelberg

host: Karl Gebhardt

Sep. 30

"The Architecture and Timing of Planetary Systems"


Daniel Fabrycky

University of Chicago

host: TBD

Oct. 7

"Who's Afraid of the Big Bad Supermassive Black Hole?"


Jonathan Trump

Pennsylvania State University

host: Steve Finkelstein

Oct. 14

"Puzzles in the Structure of Disk Galaxies"


Stephane Courteau

Queen's University, Kingston, Ontario, Canada

host: Karl Gebhardt

Oct. 21

"Galaxy Build-up in the First Gyr: Insights from ultra-deep HST and Spitzer Observations"

The observational frontier of galaxy build-up now lies at only ~450 Myr after the Big Bang, at redshifts z~10-12. While only a handful of galaxies are identified at these early cosmic times so far, I will show how the powerful combination of the Hubble and Spitzer Space Telescopes allows us to probe the assembly of galaxies over 96% of cosmic history. In particular, in this talk I will review the remarkable progress we made over the last few years in studying galaxies within the reionization epoch at z>6. Thanks to the combination of various surveys with the WFC3/IR camera on the HST, it became possible to identify an unprecedented sample of >800 galaxies at z~7-8, and we are now building up the sample sizes at z~9-12. These detections allow us to directly track the evolution of the UV luminosity function and the cosmic star-formation rate density in the first 1 Gyr of cosmic time. At the same time, deep observations with Spitzer/IRAC probe the rest-frame optical light of these galaxies, leading to the first measurement of the stellar mass density out to z~10 and to constraints on the epoch of first star-formation in these systems. I will put these results in the context of cosmic reionization by galaxies and end my talk with a future perspective of the JWST era and beyond.


Pascal Oesch

Yale University

host: Steve Finkelstein

Oct. 28

"Forming Earths and Mercuries: Solids Less Volatile than Ice"


Alexander Hubbard

American Museum of Natural History, New York

host: Joel Green

Nov. 4

"Shedding Lyman Alpha Light on Cosmological Reionization"


James Rhoads

Arizona State University

host: Steve Finkelstein

Nov. 11

"Title: TBA"


Andrea Isella

Rice University

host: Adam Kraus

Nov. 18

"Title: TBA"


Rebecca Bernstein

Giant Magellan Telescope Observatory

host: Taft Armandroff

Nov. 25

"Title: TBA"


Speaker: TBD

Affiliation: TBD

host: TBD

Dec. 2

DeVaucouleurs Medalist

DeVaucouleurs Lecture: "The Growth of Supermassive Black Holes and Galaxy Evolution"


C. Megan Urry

Yale University

host: Shardha Jogee

Dec. 3
ECJ 1.202

DeVaucouleurs Medalist

Public Lecture: "Black Holes, Galaxies and the Evolution of the Universe: An Observer's View"


C. Megan Urry

Yale University

host: Shardha Jogee

Dec. 9

"Brown Dwarfs as Exoplanet Analogs"


Katelyn Allers

Bucknell University, Lewisburg PA

host: Adam Kraus

Visitors to the Department of Astronomy can find detailed information and maps on our Visiting Austin Page.

Please report omissions/corrections to: G. Orris at


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