Colloquia Schedule Spring 2016

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

 
Jan. 19

"Spirals, Gaps, and Cavities: Signposts of Planets in Protoplanetary Disks?"

We are about to enter a golden age in the field of planet formation and circumstellar disks, thanks to a fleet of new instruments with unprecedented resolving power. In the past few years, technological advances in adaptive optics and the use of differential imaging techniques have enabled us to achieve angular resolutions of 0.05 arcsec and inner working angles of 0.1 arcsec. At mm wavelengths, ALMA has brought us over one order of magnitude improvements over existing facilities in both resolution and sensitivity. Now for the first time it is possible to directly see planets forming in nearby disks. Recent observations using Subaru/HiCIAO, VLT/SPHERE, Gemini/GPI, and ALMA have revealed astonishing fine structures in gaseous protoplanetary disks, such as the rings and gaps in HL Tau and TW Hya, the giant spiral arms in MWC 758, SAO 206462, HD 100453, and FU Ori, and the central cavities in many transitional disks. These structures have been widely speculated to be related to ongoing planet formation activities, though it is not well understood exactly how. In my talk I will review major discoveries of fine structures in disks made in the past few years, and discuss their possible origins; particularly, whether they are induced by embedded planets invisible to us at the moment.

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Robin (Ruobing) Dong

LBNL/Berkeley

host: Adam Kraus

Jan. 26

"The Key Influence of AGB Stars on the Evolution and Global Properties of Galaxies"

abstract

Martha L. Boyer

NASA Goddard

host: Kristen McQuinn

Feb. 2

"CAMPARE and Cal-Bridge: Two Synergistic Programs Forming a Successful New Model for Promoting Participation of Women and Underrepresented Minority Students in Astronomy"

abstract

Alexander L. Rudolph

California State Polytechnic University, Pomona

host: William Cochran

Feb. 9

"Exoplanet Atmospheres in High Resolution"

abstract

Jayne L. Birkby

Harvard-Smithsonian Center for Astrophysics

host: Daniel Jaffe

Feb. 16

"The Dynamical Evolution of Young Stellar Complexes in the Milky Way"

abstract

Alison I. Sills

McMaster University, Hamilton, ON

host: Natalie Gosnell

Feb. 23

"The Evolution of Galaxy Structural Properties"

abstract

Rachel Somerville

Rutgers University, Downsbrough Chair in Astrophysics

host: Shardha Jogee

Mar. 1

"A PHAT New Measurement of the High-Mass Stellar IMF"

abstract

Daniel Weisz

UC Berkeley/University of Washington

host: Michael Boylan-Kolchin

Mar. 8

"The Role of Dwarf-Dwarf Galaxy Interactions in Galaxy Assembly"

abstract

Sabrina Stierwalt

NRAO/University of Virginia

host: Kristen McQuinn

Mar. 15

No colloquium scheduled. (Spring Break)

Mar. 22

"Title: TBA"

Khee-Gan Lee

UC Berkeley/LBNL

host: Caitlin Casey

Mar. 29

"Title: TBA"

Hai Fu

University of Iowa

host: Caitlin Casey

Apr. 5

"Title: TBA"

Matthew Benacquista

University of Texas Rio Grande Valley

host: J. Craig Wheeler

Apr. 12

"Title: TBA"

William F. Bottke (Planetary Tinsley Scholar)

Southwest Research Instutite, Boulder, Colorado

host: Mike Endl/Judit Ries

Apr. 19

"Title: TBA"

Tiantian Yuan (Exgal Tinsley Scholar)

Australia National University

host: Chao-Ling Hung

Apr. 26

"Title: TBA"

Michael Cushing

University of Toledo

host: Brendan Bowler

May 3

"Title: TBA"

Kaitlin M. Kratter (ISM Tinsley Scholar)

Steward Observatory, University of Arizona

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 argus@astro.as.utexas.edu.

5 February 2016
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