Radiation Processing in the Kuiper Belt Mike Brown Caltech.

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Presentation transcript:

Radiation Processing in the Kuiper Belt Mike Brown Caltech

Spectrum of pluto Pluto

CH4 N2

C2H2 C2H4 C2H6

(Brown et al 2007) Pluto 2005 FY9

CH4

2005 FY9

C2H6

2005 FY9 C2H6+C2H4

2005 FY9 C2H6+C2H4

2005 FY9 C2H6+C2H4+C2H2

2005 FY9 CH4

2005 FY9 CH4

C2H2 C2H4 C2H6

Schaller & Brown ApJL (2007a) Temperature (K) Diameter (km)

` Schaller & Brown ApJL (2007a) Temperature (K) Diameter (km)

Schaller & Brown ApJL (2007a) Temperature (K) Diameter (km)

Schaller & Brown ApJL (2007a) Diameter (km)

Schaller & Brown ApJL (2007a) Diameter (km)

Brown et al Eris

No N micron feature detected No CO micron feature detected Alpha N2 Beta N2

Schaller & Brown ApJL (2007a) Diameter (km)

Quaoar - Water ice spectrum (Jewitt & Luu 2004)

Quaoar Spectrum Schaller & Brown ApJL (2007b)

Quaoar Spectrum 40% crystalline water ice w/ 10 micron grains Schaller & Brown ApJL (2007b)

Quaoar with water ice + methane model Water ice Water ice+methane Schaller & Brown ApJL (2007b)

Quaoar C2H6 Schaller & Brown ApJL (2007b) Normalized Reflectance

Quaoar with full spectral model 35% crystalline water ice, 6% methane, 4% ethane, 55% dark continuum methane ethane Schaller & Brown ApJL (2007b)

2005 FY9 Quaoar Eris Pluto