Texas Cosmology Center

Calendar

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2011

September-December


Mon, Dec 5
3:30 P.M.
RLM 15.216B

TCC Presentation / Theoretical Astrophysics Seminar

Hydrogen and Helium Reionization [abstract]

Adam Lidz, University of Pennsylvania


Fri, Dec 2
2:00 P.M.
RLM 5.104

Special Astronomy/Physics Joint Colloquium

Cosmic Information: IT from BIT, from BITs in IT [abstract]

J. Richard Bond, Canadian Institute for Theoretical Astrophysics (CITA)


Wed, Nov 30
3:00 P.M.
RLM 15.216B

TCC Presentation / Cosmos Seminar

Giant Gamma-ray Bubbles in the Inner Galaxy: AGN Activity or Bipolar Galactic Wind? [abstract]

Douglas Finkbeiner, Harvard University


Mon, Nov 21
3:30 P.M.
RLM 15.216B

PhD Defense Presentation / Theoretical Astrophysics Seminar

Toward an Understanding of the Large Scale Structure of the Universe with Galaxy Surveys [abstract]

Masatoshi Shoji, University of Texas at Austin


Mon, Nov 14
3:30 P.M.
RLM 15.216B

TCC Presentation / Theoretical Astrophysics Seminar

The Plasma Physics and Cosmological Implications of TeV Blazars [abstract]

Philip Chang, University of Wisconsin, Milwaukee (formerly of CITA-ICAT)


Wed, Nov 9
3:00 P.M.
RLM 15.216B

TCC Presentation / Cosmos Seminar

Cosmology without Cosmic Variance [abstract]

Gary Bernstein, University of Pennsylvania


Wed, Nov 2
3:00 P.M.
RLM 15.216B

TCC Presentation / Cosmos Seminar

The Mass Assembly History of Black Holes in the Universe [abstract]

Priya Natarajan, Yale University


Wed, Oct 26
3:00 P.M.
RLM 15.216B

TCC Presentation / Cosmos Seminar

New Results from the South Pole Telescope [abstract]

Ryan Keisler, University of Chicago (South Pole Telescope)


Mon, Oct 24
3:30 P.M.
RLM 15.216B

TCC Presentation / Theoretical Astrophysics Seminar

From OWLS to FiBY: Numerical Simulations of Galaxy Formation and Evolution [abstract]

Claudio Dalla Vecchia, Max Planck Institute for Extraterrestrial Physics


Mon, Oct 17
3:30 P.M.
RLM 15.216B

TCC Presentation / Theoretical Astrophysics Seminar

Lyman-alpha in Three Dimensions [abstract]

Anze Slosar, Brookhaven National Laboratory


Thurs, Sep 29
3:30 P.M.
RLM 15.216B

TCC Presentation / Extragalactic Seminar

Galaxy Mergers through Cosmic Time [abstract]

Jennifer Lotz, Space Telescope Science Institute


Thurs, Sep 8
3:30 P.M.
RLM 15.216B

TCC Presentation / Extragalactic Seminar

Galaxy Formation and Evolution through Metals [abstract]

Lisa Kewley, University of Hawaii, Institute for Astronomy


January-May


Mon, May 23
3:30 P.M.
RLM 15.216B

TCC Presentation / Special Seminar

Galaxy-Galaxy Weak Lensing as a Tool to Correct Finger-of-God Effects in Redshift Power Spectrum Measurements [abstract]

Luminous red galaxies (LRGs) are useful tracers of halo distributions with mass larger than ~10^13Msolar. One of the major systematic error comes from the non-linear redshift distortion known as the Finger-of-God (FoG) effect because the internal motion of LRGs within their host halos is less known. We develop a method of correcting FoG effect by using LRG-galaxy weak lensing, or cross-correlation between foreground LRGs and background galaxy image distortion. We estimate the velocity dispersion of LRGs using their off-centering effect which suppresses the lensing signals at small angular scales. Employing observationally motivated off-centering models, we find that the FoG effect suppresses the LRG power spectrum by 10 (30)% level at scales k = 0.1(0.2)h/Mpc. LRG lensing spectrum expected from the joint analysis of upcoming imaging and spectroscopic surveys allow us to measure the velocity dispersion of LRGs within a few % statistical uncertainty. As a consequence, the error of the growth rate of cosmological perturbations decreases by a factor of 2 over a wide range of redshifts compared to the case that the velocity dispersion is unknown. The errors of the dark energy equation-of-state parameter and the neutrino energy fraction also decreases by 5-20%. The relation between off-centering profile and velocity dispersion generally provides a useful information to understanding the dynamical history of LRGs.

Chiaki Hikage, Princeton University


Thurs, May 12
3:00 P.M.
RLM 15.216B

TCC Presentation / Special Seminar

Host vs. Subhalo-2D Density Profile Measured from Galaxy-Galaxy Lensing [abstract]

Wentao Luo, University of Massachusetts, Amherst


Fri, May 6
9:45 A.M.
RLM 15.216B

TCC Presentation / Special Seminar

Velocity Probe on Cosmology [abstract]

Tsz Yan Lam, IPMU, Tokyo, Japan


Thurs, May 5
3:30 P.M.
RLM 15.216B

TCC Presentation / Extragalactic Seminar

The Dark Matter Halo - Galaxy Connection in the Local Universe and Local Group [abstract]

Michael Boylan-Kolchin, University of California, Irvine


Thurs, Apr 28
3:30 P.M.
RLM 15.216B

TCC Presentation / Extragalactic Seminar

Understanding the Global Course of Galaxy Evolution at z < 1 [abstract]

Michael C. Cooper, University of California, Irvine


Fri, Apr 22
3:00 P.M.
RLM 15.216B

TCC Presentation / Special Seminar

Obscured Quasars at High Redshift [abstract]

Daniel K. Stern, Jet Propulsion Laboratory, Caltech


Tue, Apr 12
2:00 P.M.
RLM 7.104

TCC Presentation / Weinberg Theory Seminar

Screening Dark Energy [abstract]

Justin Khoury, University of Pennsylvania


Wed, Mar 30
3:00 P.M.
RLM 15.216B

TCC Presentation / Cosmos Seminar

The Influence of Structure Formation on the Interpretation of Dark Matter Experiments [abstract]

Savvas Koushiappas, Brown University


Tues, Mar 8
3:30 P.M.
RLM 15.216B

TCC Presentation / Astronomy Colloquium

DEEP2 and Beyond: Studying Galaxy Evolution and Large-Scale Structure with Deep Surveys [abstract]

Jeffery A. Newman, University of Pittsburgh


Tue, Feb 15
3:30 P.M.
RLM 15.216B

TCC Presentation / Astronomy Colloquium

Is Inhomogeneity Important in Cosmology? [abstract]

George F. R. Ellis, University of Cape Town


Wed, Feb 9
3:00 P.M.
RLM 15.216B

TCC Presentation / Cosmos Seminar

High Resolution Imaging of the Sunyaev-Zel'dovich Effect in Galaxy Clusters [abstract]

Brian S. Mason, National Radio Astronomy Observatory (NRAO)


Wed, Feb 9
12:00 Noon
RLM 15.216B

TCC Presentation / Stellar Seminar

Observational Constraints on Dark Matter Heating in White Dwarf Stars [abstract]

Michael Montgomery, University of Texas at Austin


Mon, Jan 31
3:30 P.M.
RLM 15.216B

TCC Special Colloquium / Theoretical Astrophysics Seminar

Dark Matter [abstract]

Katherine Freese, University of Michigan


Wed, Jan 26
1:30 P.M.
RLM 15.216B

TCC Presentation

The Matching of the Cosmic Star Formation Rate and the Cosmic Supernova Rate [abstract]

Shunsaku Horiuchi, Ohio State University: CCAPP


Wed, Jan 19
3:00 P.M.
RLM 15.216B

TCC / Cosmos Seminar

Cosmological Imprints of f(R) Gravity [abstract]

Hayato Motohashi, Tokyo University: RESCEU


Tue, Jan 18
3:30 P.M.
RLM 15.216B

TCC / Colloquium (Tinsley Scholar)

Dust in the Early Universe [abstract]

Raffaella Schneider, INAF/Osservatorio Astronomico di Roma