Despite remarkable success at modeling the evolution of massive galaxies over cosmic time, modern hydrodynamic and semi-analytic models of galaxy formation fail to reproduce the properties of low-mass galaxies. This shortcoming in our theoretical picture is largely driven by an inability to understand the physical mechanisms by which star formation is suppressed (or “quenched”) in satellite galaxies. Using observations of galaxy groups identified in the Sloan Digital Sky Survey as well as detailed studies of dwarfs in the Local Volume, I will present recent work to constrain the satellite quenching timescale measured relative to group infall. By bringing together data across a broad range in satellite and host mass, our analysis has established a coherent physical picture of satellite quenching that address the most glaring deficiencies of current galaxy formation models. As time allows, I will conclude by discussing ongoing work to study the spatial anisotropy in satellite distributions as a test of the Lambda-CDM paradigm.
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 126 (PH2-126). 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|
|August 31||Meet & Mix CSULB Faculty and Staff||Faculty and Staff|
|September 14||Light Nuclei, the Universe, and Everything||Kenneth Nollett, Department of Physics, San Diego State University|
|September 21||Looking for unconventional quantum states in layered materials & heterostructures||Claudia Ojeda-Aristizabal, CSULB|
|September 28||Magnetoresistance Measurements on SmB6 – Cornering the Parameter Space of an Illusive Correlated Topological Insulator||Cagliyan Kurdak, University of Michigan|
|October 5||The Role of Physics in Medicine: Examples from X-Ray Computed Tomography||M. McNitt-Gray, UCLA Radiology|
|October 12||Searching for the dark universe with matter wave interferometry||P. Hamilton, UCLA|
|October 19||From Physics to Data Science||D. Benveniste, EMC Corporation|
|October 26||Heating up Quantum Mechanics||S. Parameswaran, UC Irvine|
|October 29-31||Annual Meeting of the APS Far West Section||Conference Webpage|
The Unpredictable, the Predetermined, and the Postdetermined Unfold Together
|R.G. James, UC Davis|
|November 9||Quadratic Magneto Optical Kerr Effect and Chirality of Magnetization Reversal in Py/SmFe/Py Exchange Springs||Jiyeong Gu, CSULB|
|November 16||Magnetic Force Microscopy of Magnets with Competing Interactions||Yeong-Ah Soh|
Confining Energetic Ions in Magnetic Fusion Experiments
Dept. of Physics & Astronomy,
|December 2||Student Presentations I||CSULB students|
|December 7||Student Presentations II||CSULB students|
|December 9||Student Presentations III||CSULB students|
|January 25||Time Fluctuations in Quantum Systems Out-of-Equilibrium||Lorenzo Campos Venuti, USC|
|February 1||Functionalizing Graphene for Spintronics and Quantum Information Applications: Density Functional Studies||Ruqian Wu, UCI|
|February 8||Anyonics: Designing Exotic Circuitry with Non-Abelian Anyons||Kirill Shtengel, UCR|