The Mass-Radius Relation for 65
Exoplanets Smaller than Neptune
Dynamics
Evolution of
Lauren and
M. Weiss
NSF Graduate
Research
Fellow
Earth-Size
Planets
UC Berkeley
Sunday, September 14, 14
Sub-Neptunes are common...what are
they made of?
(Kepler Team 2014)
Sunday, September 14, 14
Do Sub-Neptunes
have water/ice?
POSSIBLE
SUB-NEPTUNE
Core (rock, iron)
Atmosphere (hydrogen,
helium)
/ POSSIBLE SUB-NEPTUNE
Sunday, September 14, 14
Measure stellar radial
velocity
determine msini
Sunday, September 14, 14
Measure transits,
transit timing variations
Sunday, September 14, 14
determine Rp/Rs, m x e
Mass determinations and upper limits of 65
exoplanets smaller than 4 Earth radii from RVs, TTVs
Marcy et al. 2014
40 RV-determined masses and upper limits
Literature
12 TTV-determined masses
Literature
13 RV-determined masses
Sunday, September 14, 14
65 Masses of Exoplanets Smaller than 4 Earth radii
(40 from Marcy+ 2014)
Sunday, September 14, 14
65 Masses of Exoplanets Smaller than 4 Earth radii
(40 from Marcy+ 2014)
Sunday, September 14, 14
The Mass-Radius Relation for 65
Exoplanets Smaller than Neptune
(Weiss & Marcy 2014, ApJL)
Sunday, September 14, 14
The Mass-Radius Relation for 65
Exoplanets Smaller than Neptune
(Weiss & Marcy 2014, ApJL)
Sunday, September 14, 14