Lunch talk

This is a talk given at lunch time, usually in the conference room at noon.

The high-energy environment and atmospheric escape of small exoplanets

Friday, October 2, 2020 - 10:00am to 11:00am
Leonardo dos Santos (University of Geneva)

Similarly to stars, planets also lose mass with time, even our own Earth. In particular, hot extrasolar planets orbiting close to their host stars are subject to large mass loss rates due to heating by high-energy irradiation and subsequent atmospheric escape.

Searching for Wide Planetary-Mass and Substellar Companions with Circum(sub)stellar Disks through PSF-Fitting of Spitzer/IRAC Archival Images

Friday, October 30, 2020 - 2:00pm to 3:00pm
Raquel Martinez (UT Austin)

The last decade has seen the discovery of a growing population of planetary-mass and substellar companions (~<20 MJup) to young stars which are often still in the star-forming regions where they formed.

Decipher the ubiquitous bursty phase in high-redshift galaxy formation

Friday, November 20, 2020 - 12:15pm to 1:00pm
Xiancheng Ma (Berkeley)

Galaxy formation is an essential research area in astronomy. High-resolution cosmological zoom-in simulations with realistic multi-phase ISM, star formation, and feedback models have significantly advanced our understanding of galaxy formation theory in recent years.

The evolution (or not) of the star formation efficiency, dust content, and duty cycle of high-z galaxies

Friday, November 6, 2020 - 12:15pm to 1:00pm
Jordan Mirocha (McGill)

A relatively simple model has emerged in recent years that can explain the bulk properties of high redshift galaxies: star formation is fueled by the inflow of pristine material from the intergalactic medium, and proceeds with an efficiency that depends strongly on the mass of a galaxy's parent d

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