Microlensing Parallax Observations with Spitzer and Kepler

Gravitational microlensing is a very unique technique in detecting faint and/or dark objects in our Milky Way. This technique is very sensitive to the alignment among observer, lens, and source star, such that space-based telescopes such as Spitzer and/or Kepler, which are separated from Earth by only ~1 AU, see substantially different light curves of the same microlensing event compared to what the ground-based telescopes see. In this talk, I will present the recent results from the ongoing Spitzer microlensing program (2014-2018), in particular of detecting and characterizing exoplanets in the Milky Way, and also present the preliminary result from the Kepler (K2) microlensing campaign (2016) on searching for free-floating planets.

Speaker: 
Dr. Wei Zhu (Ohio state university)
Location: 
KIAA First floor meeting room
Time: 
Fri, 2017-07-14 12:00 to 13:00