Colloquia and Events

The Department hosts a regular weekly colloquium series featuring speakers from academia and industry.  During Spring 2018, the colloquia will take place on Thursdays at 3 pm in BIOS 335.  Refreshments are served first and talks will begin at 3:15 pm.

This week's colloquium

“The Birth of Planets: Signatures in Circumstellar Disks”
Prof. Wladimir Lyra, CSU Northridge

Feb. 1, 3 pm, BIOS 335

During the first million years of evolution, nascent planetary systems are embedded in dense disk-shaped clouds of gas. These circumstellar disks are home to a myriad of hydrodynamical processes, which bring about turbulence and the emergence of viscous-like behavior, enabling accretion of gas onto the protostar. Meanwhile, micron-sized dust grains embedded in the disk are growing through coagulation onto pebbles and rocks. Turbulence has a positive effect on these small solids, concentrating them into transient high pressure regions for long enough to achieve gravitational collapse through pebble accretion into km-sized bodies, forming the first planetesimals. Giant storm systems in the disk, similar to Jupiter's Great Red Spot, may exist in quiescent zones of the disk. These are even more prone to collecting solid material, producing the first terrestrial planets and cores of giant planets. In this talk I will discuss the state of the art and recent advances in the field of planet formation, as well as pressing problems such as the structure observed in high resolution sub-millimeter images of circumstellar disks, and how to interpret them.


Future colloquia

February 8
Pizza party and on-campus research opportunities

More coming soon...

Past colloquia

September 7
"Observation of Multipoles in the Solid State by Means of Ultrasound"
Prof. Tatsuya Yanagisawa, Hokkaido University

September 14
"Setting the Initial Conditions for Planets: The Young Circumstellar Disk"
Prof. Leslie Looney, University of Illinois

September 21
"The 100 Year Odyssey from Einstein to Gravitational Waves"
Prof. Emeritus Barry C. Barish, Caltech

September 28
"Supermassive Black Hole Formation"
Dr. Christine Corbett Moran, Caltech

October 5
"Innovative Approaches in mm-Wavelength Cosmology"
Dr. Abigail Crites, Caltech

October 12
"Observations of the Diffuse Universe"
Dr. Erika Hamden, Caltech

October 19
"Astrophysics Learned from the Detection of Gravitational Waves"
Dr. Riccardo DeSalvo, Cal State LA

October 26
"Competing Orders in the 112 Fe pnictide Superconducting Family"
Prof. Ni Ni, UCLA

November 9
“Exploring Novel Relativistic Mott Insulators in the 2-dimensional Limit”
Prof. Claudia Ojeda-Aristizabal, Cal State Long Beach

November 16
“Sculpting Crystals with Light – Optical Blasting Deforms Colloidal Crystal Grains”
Prof. Sharon Gerbode, Harvey Mudd College