Wei Zhu(祝伟)
I'm now an Assistant Professor in the Department of Astronomy at Tsinghua University in Beijing.
Wei Zhu (祝伟)
Canadian Institute for Theoretical Astrophysics
Microlensing 23, NYC
(Based on Madsen & Zhu, arXiv:1901.04495)
Sabrina Madsen
Gaudi (2012)
Skowron et al. (2011); Yee et al. (2016)
(OGLE-2006-BLG-109, Gaudi et al. 2008, Bennett et al. 2010;
OGLE-2016-BLG-1190, Ryu et al. 2018;
Gaia16aye, Wyrzykowski et al. 2019)
Fabrycky & Murray-Clay (2010)
(see also Wang et al. 2018)
b
c
d
Marois et al. (2008)
planet 2
planet 1
Han et al. (2013)
(see Beaulieu et al. 2016 for AO observations)
Both planets inside Einstein ring
Both planets outside Einstein ring
Madsen & Zhu (arXiv:1901.04495)
Face-on Edge-on
planet 2
planet 1
Madsen & Zhu (arXiv:1901.04495)
planet 2
planet 1
Pluto & Neptune
Mean-motion resonances
Madsen & Zhu (arXiv:1901.04495)
Eccentric orbits & in MMRs
Nearly circular orbits & out of MMRs
Madsen & Zhu (arXiv:1901.04495)
Lee & Peale (2002)
Evolution of GJ 876 system
planet 2
planet 1
HATNet
Keck
Hot Jupiters
(~1%)
Cold Jupiters
(~10%)
Cold Neptunes
(?)
Super Earths
(30%)
(Zhu et al. 2018)
Hot Jupiters have distant companions
(Knutson et al. 2014)
Hot Jupiters are lonely (Steffen et al. 2010)
Super Earths & cold Jupiters tend to co-exist
(Zhu & Wu 2018)
Data from NASA Exoplanet Archive
planet 2
planet 1
Einstein ring
planet 2
planet 1
Probability distribution
Madsen & Zhu (arXiv:1901.04495)
Madsen & Zhu (arXiv:1901.04495)
Face-on Edge-on
Pollack et al. (1996)
Beaulieu et al. (2016)
OGLE-2006-BLG-109: A Jupiter/Saturn analog
Gaudi et al. (2008); Bennett et al. (2010)
Ryu (incl. Zhu) et al. (2018)
OGLE-2016-BLG-1190
By Wei Zhu(祝伟)
Talk at the 23rd microlensing conference in NYC
I'm now an Assistant Professor in the Department of Astronomy at Tsinghua University in Beijing.