Calendar
2010
September-December
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Wed, Nov 24 |
TCC / Cosmos Seminar The Atacama Cosmology Telescope: The Present and the Future [abstract] |
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Mon, Nov 22 |
TCC / Astro Theory Seminar Self-regulated Evolution of Galaxies and Supermassive Black Holes [abstract] |
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Thurs, Nov 18 |
TCC / Exgal Seminar Exploring the Dark Universe with Gravitational Lensing [abstract] Strong gravitational lens systems provide a tool for measuring
cosmological parameters and for probing galaxy mass distributions. In
the first part of my talk, I will show how strong lens systems with
measured time delays between the multiple images can be used to
measure the "time-delay distance" to the lens, and thus the Hubble
constant. In particular, I will present a Bayesian analysis of the
strong gravitational lens system B1608+656, incorporating (i) new,
deep HST observations, (ii) a new velocity dispersion measurement of
the primary lens galaxy, (iii) an updated study of the lens
environment, and (iv) time-delay measurements. By modeling the
primary lens galaxy stellar dynamics and the density environment of
the lens, we break the mass-sheet degeneracy present in the lensing
analysis and measure cosmological parameters through the time-delay
distance. I will present the resulting constraints on cosmological
parameters, particularly the Hubble constant and the dark energy
equation of state, from the combination of B1608+656 and the Wilkinson
Microwave Anisotropy Probe data. In the second part of my talk, I
will focus on using gravitational lensing to probe the properties of
the dark matter halos of galaxies, independent of their light
profiles. In particular, I will present a measurement of the dark
matter halo size of the satellite galaxy in the massive elliptical
lens SL2S J08544-0121. |
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Thu, Nov 11 |
Special TCC Seminar A Weak Lensing Study of the Coma Cluster, and a Higher-Order Moment Approach to Weak Lensing [abstract] |
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Mon, Nov 8 |
TCC / Astro Theory Seminar Measuring the Universe: Recent Developments in Baryon Acoustic Oscillations [abstract] |
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Mon, Oct 18 |
TCC / Astro Theory Seminar Looking for WIMPs with the Cryogenic Dark Matter Search (CDMS) [abstract] |
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Wed, Oct 6 |
TCC / Stellar Seminar The Square Kilometre Array [abstract] |
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Tue, Oct 5 |
TCC / Colloquium Equivalence Principle and Cosmic Acceleration [abstract] |
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Mon, Oct 4 |
TCC / Astro Theory Seminar Dynamics of Bubble Collisions: A New Mechanism for Creating Bubbles in the Early Universe [abstract] |
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Wed, Sep 8 |
TCC / Cosmos Seminar Optimizing a ground-based CMB polarization experiment [abstract] |
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Wed, Sep 1 |
TCC / Cosmos Seminar Cosmic Rays and the Quest for New Physics [abstract] |
March-August
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Fri, Mar 12 |
TCC / Special Seminar The Formation of the First Stars: Simulations on a Moving Mesh [abstract] Thomas Greif, Max Planck Institut for Astrophysics, Garching, Germany |
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Mon, Mar 1 |
TCC / Special Supernova Seminar Diversities of the Type Ia Supernova Light Curves from the Ejecta Velocity: Evidence for Systematics in SN Ia distances [abstract] Xiaofeng Wang, Texas A&M University |
January-February
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Mon, Feb 22 |
TCC / Theoretical Astrophysics Seminar The 7-year WMAP Observations: Cosmological Interpretation [abstract] |
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Sat, Feb 6 |
Eighteenth Annual Great Lecture in Astronomy Walk Softly When Exploring the Dark Side of the Universe: Black Holes, Dark Matter and Dark Energy [abstract] |
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Mon, Feb 1 |
TCC / Theoretical Astrophysics Seminar Cosmic Voids as a Cosmological Probe [abstract] |