From Stars to Planets Gainesville 14 April 2007 Short-lived radioisotopes: A cosmochemical connection between star and planet formation Eric Gaidos 1,3 Jonathan Williams 2,3 Nick Moskovitz 2 Daniel Rogerrs 4 1 Department of Geology & Geophysics 2 Institute for Astronomy 3 NASA Astrobiology Institute 4 Department of Physics & Astronomy University of Hawaii at Manoa Launch of COROT

From Stars to Planets Gainesville 14 April 2007 Armstrong et al. (1984) Evidence for live 26 Al in the early Solar System

From Stars to Planets Gainesville 14 April 2007 Markowski et al. (2006) Early (<2 Myr) differentiation of some meteorite parent bodies

From Stars to Planets Gainesville 14 April 2007 Evidence for the homogeneity of 26 Al Thrane et al. (2006)

From Stars to Planets Gainesville 14 April 2007 Bizzarro et al. (2006) Absence of 60 Fe in iron meteorite parent bodies?

From Stars to Planets Gainesville 14 April 2007 Contribution to 26 Al by Wolf-Rayet winds

From Stars to Planets Gainesville 14 April 2007 Meynet & Maeder (2005) 26 Al 60 Fe

From Stars to Planets Gainesville 14 April 2007 Overlapping time scales Half life of 26 Al0.72 Myr Massive star lifetime>3 Myr Protostar and disk lifetime1-5 Myr Cluster dispersal time1-10 Myr Accretion time scale1-10 Myr

From Stars to Planets Gainesville 14 April 2007 N-body simulations of a 9000-star cluster containing a 60 solar-mass (O3) star and ~270 solar mass ( ) stars t = 0 t = 3 Myr

From Stars to Planets Gainesville 14 April 2007 Williams & Gaidos, in prep. N = 9000

From Stars to Planets Gainesville 14 April 2007

Cumulative distribution of relative 26 Al inventories 0.1X 10X 1X

From Stars to Planets Gainesville 14 April 2007 Thermal histories of 3-km planetesimals with Solar, 0.1X, and 10X 26 Al

From Stars to Planets Gainesville 14 April 2007

Leger et al. (2004) Less dehydration: Ocean worlds?

From Stars to Planets Gainesville 14 April 2007 Disk injection scenario Single O3 (60 solar-mass star) in 500 star cluster Plummer sphere with specified core radius and virial parameter ≥0.5 reflecting gas loss (Bastian & Goodwin 2006) Simulation stopped at 3.8 Myr Yield of 26 Al in wind from Limongi & Chieffi (2006) Injection efficiency of 100%; no decay during time of flight Mass fraction of 26 Al calculated according to Looney et al. (2006): time of flight of ejecta injection efficiency mass of isotope in ejecta distance from SS to progenitor surface density of SS solar system value; 26 Al/ 27 Al = 5.85 × 10 -5

From Stars to Planets Gainesville 14 April 2007 g = 0.5 g = 0.9

From Stars to Planets Gainesville 14 April 2007 Denizens of a low 26 Al world....