Date

Speaker

Title

Aug 30

Neal Evans

University of Texas at Austin

Organizational meeting.

Sep 6

Joel Green

University of Texas at Austin

"Episodic Accretion in Young Stars"

abstract

Sep 13

Charles "Chat" Hull

University of California, Berkeley

"From Clouds to Cores to Envelopes to Disks: A Multi-scale View of Magnetized Star Formation" (host: Joel Green)

abstract

Sep 20

Mike Pavel

University of Texas at Austin

"Polarimetric Tomography of the Galactic Magnetic Field"

Sep 27

Adam Kraus, Joel Green, Michael Gully-Santiago, Neal Evans

University of Texas at Austin

"Highlights from the Protostars & Planets VI Conference (Heidelberg, Germany: 15-20 July 2013)"

Oct 4

Vanessa Bailey

University of Arizona

(host: Neal Evans) "Hole-y Debris Disks, Batman! (Giant planets sculpting disks and the technology we need to image them)"

The handful of known wide-separation planet-mass companions are already challenging planet formation theories, so each addition to the set of directly imaged (DI) companions is valuable for understanding formation mechanisms. DI surveys are resource-intensive, and giant planets at large orbital separations are rare. Thus, there is a strong incentive to find so-called "signposts" for planets. Directly imaged planets like HR 8799 bcde sculpt the debris disks surrounding their host stars and suggest a tantalizing option: target systems with gapped ("hole-y") debris disks. We are conducting a thermal IR imaging survey of young systems with IR SEDs indicative of gapped debris disks. Such observations require world-class adaptive optics systems, and the University of Arizona has pioneered the use of adaptive secondary mirror + pyramid wavefront sensor technology. The UofA's Large Binocular Telescope Interferometer AO and Magellan AO systems have excellent performance as well as the flexibility needed to work from Vega down to 15th magnitude guide stars, and will provide the knowledge basis for the GMT AO system.

close

Oct 11

No talk scheduled, to avoid conflict with the Bashfest 2013 Symposium (on 7-8 October).

Oct 18

Megan Reiter

University of Arizona

"Jets from Intermediate-mass Protostars as a Fossil Record of Accretion"

abstract

Oct 18

Johanna Teske

University of Arizona

"Diamonds in the Rough: A Cautionary Tale of C/O Ratios in Exoplanet Host Stars"

abstract

Oct 25

Yao-Lun Yang

University of Texas at Austin

"Molecular Hydrogen in the Diffuse Medium of the Large Magellanic Cloud"

Nov 1

"NRAO Community Day: NRAO Data Analysis Workshop (8 AM - 6 PM: POB 2.302 Avaya Auditorium)

Nov 8

Jeong-Eun Lee

Kyung Hee University, South Korea

"Detailed Analysis of DIGIT Embedded Protostars"

abstract

Nov 15

Presentations by Manuel Merello and Emma Yu have been rescheduled to next week (22 November).

Nov 22

Manuel Merello

University of Texas at Austin

"Physical Characterization of Galactic Star-forming Clumps using (Sub)millimeter Continuum Surveys"

Nov 22

Emma Yu

University of Texas at Austin

"Probing the Protoplanetary Disks with ALMA - a CO Perspective"

Nov 29

Day after Thanksgiving Day: Staff Holiday. University Closed: No classes or seminars held today.

Dec 6

Harriet Dinerstein

University of Texas at Austin

"Kappa Distributions: A Possible Solution to the Nebular Abundance Problem"

Dec 6

Amanda Turbyfill

University of Texas at Austin

"Application of Kappa Distributions to Planetary Nebulae Spectra"