Kepler + Keck: Planet Masses and Densities Kepler + Keck: Planet Masses and Densities Geoff Marcy UC Berkeley + Preliminary Results Howard Isaacson, Jason Rowe, Andrew Howard, John Johnson Acknowledgements Acknowledgements William Borucki David Koch Stephen Bryson Jason Rowe David Charbonneau Guillermo Torres Francois Fressin Jean-Michel Dsert Lars Buchhave Sam Quinn Dan Fabrycky Debra Fischer Natalie Batalha Thomas Gautier Steve Howell Charlie Sobeck David Latham Ron Gilliland Eric Ford Elliott Horsch Tom Barclay Jessie Christiansen Jack Lissauer Dimitar Sasselov Sara Seager Jon Jenkins Mike Haas Doug Caldwell Jeff Van Cleve David Ciardi Jeff Smith Martin Still Martin Stumpe Peter Tenebaum Lucianne Walkowicz Bill Cochran Mike Endl Leslie Rogers Special Thanks to: Howard Isaacson, Jason Rowe, Andrew Howard, John Johnson Special Thanks to: Acknowledgements Acknowledgements William Borucki David Koch Stephen Bryson Jason Rowe David Charbonneau Guillermo Torres Francois Fressin Jean-Michel Dsert Lars Buchhave Sam Quinn Dan Fabrycky Debra Fischer Natalie Batalha Thomas Gautier Steve Howell Charlie Sobeck David Latham Ron Gilliland Eric Ford Elliott Horsch Tom Barclay Jessie Christiansen Jack Lissauer Dimitar Sasselov Sara Seager Jon Jenkins Mike Haas Doug Caldwell Jeff Van Cleve David Ciardi Jeff Smith Martin Still Martin Stumpe Peter Tenebaum Lucianne Walkowicz Bill Cochran Mike Endl Leslie Rogers Keplers Heavy Lifters 4 Mass-Radius Diagram 5 Value of planet masses: - Fraction Rocky vs. R PL - Interior Structure - Formation Physics 10-meter Keck Telescope HiRES Spectrometer Doppler Work at Vmag = 13.9 Challenges: Moonlight, Sky lines, Cosmic rays Kepler-8: (45 min, Full moon) Red CCD Middle CCD Blue CCD 8000 A 3600 A Kepler-8 V = 13.5 mag Keck- HiRES Spectrometer Doppler Precision: