Friday, May 1, 2015
12:00 pm in HSCI-224
Fig: Sunyaev Zel'Dovich decrement in the Coma Cluster. (Planck Collaboration).
The thermal Sunyaev-Zel’dovich (SZ) effect provides a redshift- independent means of measuring gas properties in galaxy clusters, especially in the outskirts where traditional X-ray studies are least sensitive. This allows a better characterization of cluster physics and tighter constraints on cosmological parameters. Bolocam, a mm-wave imaging camera operated from the Caltech Submillimeter Observatory (CSO), was used to study the SZ effect in a sample of clusters with previous X-ray observations. Gas density and temperature profiles are recovered from a joint fitting method combining thermal SZ maps and X-ray surface brightness profiles. The clusters are modeled using smooth analytical profiles and non-parametric onion-skin structures. A single joint likelihood function is maximized through a Monte Carlo Markov Chain (MCMC) approach.
See the colloquium schedule and its archive of previous talks
Colloquia are scheduled to start Mondays at 11:15am sharp in Peterson Hall 2, Room 110 (PH2-110, map). Refreshments are served from 10:45am to 11:05am in Room HSCI-224 (next to the department office) and everyone is invited to mingle with faculty and students!
We acknowledge with gratitude donations and support from the following present sponsors:
We also acknowledge with gratitude our past donors: The Forty-Niner Shops, Inc., The Northrop Grumman Foundation, Sandra Dana, Anonymous.
If you wish to support the Colloquium, please contact the colloquium coordinator or the department chair. Thank you!
|Date||Title||Speaker and Affiliation|
|February 2,2015||Rapid Sequencing of Individual DNA Molecules with Graphene Nanogaps||Henk Postma, CSUN|
|February 9, 2015||Probing and Controlling Ultrafast Electron Motion with Attosecond Transient Absorption Spectroscopy||Michael Chini, UCF|
|February 11, 2015||Transparent Conducting Oxide Active Plasmonics and Metasurfaces: Ultrasmall and Ultrathin Optics||Howard Lee, Caltech|
|February 16, 2015||Nuclear Magnetic Resonance in Condensed Matter Physics: Unconventional Superconductivity, Quantum Magnetism, and Other Magnificent Tales||Georgios Koutroulakis, UCLA|
|February 18, 2015||Few-body Physics in Ultracold Atoms: Observation of Geometric Scaling Symmetry in Li-Cs-Cs Efimov States||Shih-Kuang Tung, NU|
|February 23, 2015||Molding Light with Flat Optics||Myoung Hwan Kim, Columbia U.|
|February 25, 2015||Quantum Phenomena and Layered Heterostructures||Claudia Ojeda-Aristizabal, UCB|
|March 9, 2015||What is a Sagnac interferometer and what can it do?||Jing Xia, UC Irvine.|
|March 16, 2015||Local Probes of the Early Universe: Using Nearby Brown Dwarfs to Measure Lithium Production in Big Bang Nucleosynthesis||Adam Burgasser, UCSD|
|March 23, 2015||The Cosmos seen through the Planck Satellite's Eyes||Elena Pierpaoli, USC|
|April 6, 2015||The Role Of Quantum Geometry In Topological Phases||Rahul Roy, UCLA|
|April 13, 2015||When Spin meets Momentum?||Vivek Aji,UCR|
|April 20, 2015||Cosmic Light||Asantha Cooray, UCI|
|April 27, 2015||Metamorphosis of Superconducting Correlations in a Magnetic Material||Andreas Bill, CSULB|