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Department News and Colloquium

Physics & Astronomy Colloquium at CSU Long Beach


Thermodynamic Profiles of Galaxy Clusters

Jennifer Shitanishi
University of Southern California

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!


For information and suggestions about the colloquium please contact the colloquium coordinator:
Prof. Prashanth Jaikumar, Phone: 562-985-5592, Email:

Directions to Campus

  • Access to Campus
  • Campus Maps
  • Parking on campus: contact the coordinator of the colloquium. If not reachable, call the department office (562) 985-7925. If none of these are available at the time you need information, call (562) 985-4146 or go to the drive-through information booth at the main campus entrance (on Beach Drive, near the crossing to Bellflower).
  • Walk (or ask for a ride on an on-campus shuttle) to the department office: Hall of Sciences, Room 220 (HSCI-220). The coordinator will provide the necessary informations.
  • Any question or problem: call the colloquium coordinator or the department office (562) 985-7925.

Colloquia Sponsors:

We acknowledge with gratitude donations and support from the following present sponsors:

  • H.E. and H.B. Miller
  • Benjamin Carter
  • The American Physical Society
  • Anonymous

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!

Academic Year 2014-2015

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

Colloquia Schedule