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Poster Presentations
Non-axisymmetric Instabilities in Core Collapse Supernovae
Shizuka Akiyama, University of Texas at Austin
abstract
The H II Region of the First Star
Marcelo A. Alvarez, University of Texas at Austin
abstract
Dwarf Galaxies over the last 2 Gyr
Fabio D. Barazza, University of Texas at Austin
abstract
TEXES Observations of Molecular Hydrogen Emission from AB Aur
Martin A. Bitner, University of Texas at Austin
abstract
Low Resolution Phase Resolved Spectra of Polars
Ryan K. Campbell, New Mexico State University
abstract
Weak-line T Tauri Star Disks in the Spitzer c2d Survey of Molecular Clouds: New Constraint on the Timescale for Terrestrial Planet Building
Lucas A. Cieza, University of Texas at Austin
abstract
The Mass Assembly History of Galaxies
Niv Drory, University of Texas at Austin
abstract
Is Sersic Index a Good Pseudobulge Diagnostic?
David B. Fisher, University of Texas at Austin
abstract
The Dark Halo in NGC 821
Amy D. Forestell, University of Texas at Austin
abstract
The study of elliptical galaxy dark halos at large radii is important because it is the region
where dark matter is thought to dominate the galaxy mass and can therefore provide the best
constraints on observed dark halo properties. We present axisymmetric orbit-superposition models
of dark halo in the elliptical galaxy NGC 821 using line-of-sight velocity distributions obtained to
~100 arcsec (over 2 effective radii) with long-slit spectroscopy from the Hobby-Eberly Telescope.
We fit models with a range of dark halo density profiles and find that a power-law dark halo with
a constant density of 0.0105 Msun/pc3 is the best-fitting model ruling out both the no dark halo
and the NFW models at a greater than 3 sigma confidence level. We show the internal moments
σr, σtheta and
σphi and find that the model with no dark halo is radially anisotropic at small radii
and tangentially anisotropic at large radii while the best-fit halo models are slightly radially anisotropic
at all radii. The dark halo we find is inconsistent with previous claims of little to no dark matter halo in
this galaxy from planetary nebula measurements.
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Mid-IR Spectroscopy of Red 2MASS AGN
Lei Hao, Cornell University
abstract
White Dwarfs and Stellar Evolution
Jason S. Kalirai, University of California at Santa Cruz
abstract
Cosmological Implications of a Solid Upper Mass Limit Placed on DFSZ Axions Thanks To Pulsating White Dwarfs
Agnes B. Kim, University of Texas at Austin
abstract
Ice Absorption toward Background Stars
Claudia Knez, University of Texas at Austin
abstract
Hi-Resolution Spectroscopy of a Volume-Limited Hipparcos Sample within 100 pc
Pey Lian Lim, New Mexico State University
abstract
Low Carbon limits in Type Ia Supernovae
Howie Marion, University of Texas at Austin
abstract
Modeling Swift GRB Prompt Gamma-ray Emissions
Erin M. McMahon, University of Texas at Austin
abstract
Solving the Riddle of Convection with Pulsating White Dwarfs
Michael H. Montgomery, University of Texas at Austin
abstract
Stellar Populations in Bulges of Spiral Galaxies
Bhasker K. Moorthy, New Mexico State University
abstract
Searching for Planets around Pulsating White Dwarf Stars
Fergal Mullally, University of Texas at Austin
abstract
Evidence for a Black Hole in the center of Omega-Cen
Eva Noyola, University of Texas at Austin
abstract
Texas Supernova Search: A Wide Field Search for Nearby Supernovae
Robert M. Quimby, University of Texas at Austin
abstract
Photometry of Near Earth Asteroids at McDonald Observatory
Judit Györgyey Ries, University of Texas at Austin
abstract
The Black Hole-Bulge Relationship for QSOs in the SDSS DR3
Sarah B. Salviander, University of Texas at Austin
abstract
Double-Barred Galaxies in N-body Simulations
Juntai Shen, University of Texas at Austin
abstract
The Extended Structure of the Leo II dSph Galaxy
Michael H. Siegel, University of Texas at Austin
abstract
White Dwarf Mode Identifications and Line Shape Variations
Susan E. Thompson, Colorado College
abstract
Modeling Star Formation with Dust
Andrea Urban, University of Texas at Austin
abstract
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