Past Events

Sep 29, 2014 2:30 pm - Ferah Munshi

The title is: Impact of star formation history on the measurement of star formation rates

Sep 22, 2014 2:30 pm - Beth Stetzler, Tim Miller

"Constraints on the Progenitor System and the Environs of SN 2014J From Deep Radio Observations" by M.A. Perez-Torres et al.

The Emerging Planetary Nebula CRL 618 and its Unsettled Central Star(s)


Sep 15, 2014 2:30 pm - Evan Rich, Mike Malatesta

Surface Geometry of Protoplanetary Disks Inferred From Near-Infrared Imaging Polarimetry by Takami et al.

Characterization of a photon counting EMCCD for space-based high contrast imaging spectroscopy of extrasolar planets


Sep 08, 2014 2:30 pm - Brian Friesen

TITLE: "Near-infrared Line Identification in Type Ia Supernovae during
the Transitional Phase"

AUTHORS: Friesen, Brian ; Baron, E. ; Wisniewski, John P. ; Parrent,
Jerod T. ; Thomas, R. C. ; Miller, Timothy R. ; Marion, G. H.

ABSTRACT: We present near-infrared synthetic spectra of a
delayed-detonation hydrodynamical model and compare them to observed
spectra of four normal Type Ia supernovae ranging from day +56.5 to day
+85. This is the epoch during which supernovae are believed to be
undergoing the transition from the photospheric phase, where spectra are
characterized by line scattering above an optically thick photosphere,
to the nebular phase, where spectra consist of optically thin emission
from forbidden lines. We find that most spectral features in the
near-infrared can be accounted for by permitted lines of Fe II and Co
II. In addition, we find that [Ni II] fits the emission feature near
1.98 μm, suggesting that a substantial mass of 58Ni exists near the
center of the ejecta in these objects, arising from nuclear burning at
high density.


Aug 25, 2014 2:30 pm - Sara Barber, John Wisniewski

Massive White Dwarfs with Infrared Excesses

"How to Give a Scientific Talk" and "How to Read a Scientific Paper"

May 06, 2014 12:30 pm - Sara Barber

Dusty Disks Around Central Stars of Planetary Nebulae

Apr 29, 2014 12:30 pm - Jamie Lomax
Apr 22, 2014 12:30 pm - Ferah Munshi
I'll be doing a bit of an non-traditional journal club on Tuesday:  I'd like to address the issue of implicit (unconscious) bias in STEM in my talk.  Implicit bias has large scale ramifications in the academic career path for women (especially as you proceed higher in the pipeline), and is often considered one of the largest obstacles these women face today.  In particular, here are a few studies that I'll be drawing information from:

and if folks are interested in a little game before attending the talk, they can test themselves for implicit bias here:

Apr 15, 2014 12:30 pm - Steven Silverberg

"Prospecting in Ultracool Dwarfs: Measuring the Metallicities of Mid- and Late-M Dwarfs," by Mann, et al.

Apr 08, 2014 12:30 pm - Paul Canton

The first introduces some semirecent observations of R Coronae Boreallis, the prototype of a class of luminous variables:  'The Circumstellar Environment of R Coronae Borealis: White Dwarf Merger or Final-helium-shell Flash?'

The second is a popular paper which addresses the question of where these stars may come from, and how they fit in the grand picture of stellar evolution: 'Very Large Excesses of 18O in Hydrogen-deficient Carbon and R Coronae Borealis Stars: Evidence for White Dwarf Mergers'

Apr 01, 2014 12:30 pm - Brian Friesen


Mar 25, 2014 12:30 pm - Rhiannon Griffin
Photometric studies of Abell 1664: The subtle effect a
minor merger has on cluster galaxies
Mar 11, 2014 12:30 pm - Erin Cooper

Line-driven Disk Winds in Active Galactic Nuclei: The Critical Importance of Ionization and Radiative Transfer
Mar 04, 2014 12:30 pm - Beth Stetzler, Alex Gianninas
"Producing type Iax supernovae from a specific class of helium-ignited WD explosions?"
"Detection of White Dwarf Companions to Blue Stragglers in the Open Cluster NGC 188: Direct Evidence for Recent Mass Transfer"
Gosnell et al. (2014), ApJ, 783, L8

Feb 25, 2014 12:30 pm - Evan Rich, Malia Jenks
“The Architecture of the LkCa 15 transitional disk revealed by high-contrast imaging”

Upper limits on the luminosity of the progenitor of type Ia supernova SN2014J
Feb 18, 2014 12:30 pm - Jeremy Lusk

Title: Mass-loss histories of Type IIn supernova progenitors
within decades before their explosion


Feb 11, 2014 12:30 pm - Jenna Nugent


Feb 04, 2014 12:30 pm - Adrian Lucy, Mi Dai
For my half of journal club on Tuesday, I'll be discussing my ALMA/EVLA/IRAM work on the Kleinmann-Low star-forming nebula, from my summer at NRAO, which I presented at AAS. I'll keep it self-contained, but if anyone's very eager to get a head start, a relevant reference that significantly overlaps with our work might be: Neill et al. 2013,
I will discuss this paper:
Systematic Uncertainties Associated with the Cosmological Analysis of the First Pan-STARRS1 Type Ia Supernova Sample (

Jan 28, 2014 12:30 pm - Tim Miller

The post-common-envelope, binary central star of the planetary nebula Hen 2-11

The Morpho-kinematics of Planetary Nebulae with Binary Central Stars

Jan 17, 2014 12:30 pm - Texas, AAS meeting participants

Disseminate Texas and AAS meeting results.

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Postcards from the Universe

Jul 19, 2018 7:00 pm

Sam Noble Museum of Natural History - Dr. Nate Kaib
The Solar System's Adolescent Years

Postcards from the Universe

Aug 16, 2018 7:00 pm

Sam Noble Museum of Natural History - Dr. John Wisniewski
The Search for Habitable Planets


Sep 06, 2018 4:00 pm

Nielsen Hall 170 - Aida Wofford