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Radiation Sources for Reionization Tom Abel KIPAC/Stanford Sources First Stars Second generation stars Mini-quasars Early super-massive black holes 3D RT techniques Tom Abel Collaborators Greg Bryan (Columbia) Mike Norman, Brian O’Shea & Dan Whalen (UCSD) Matt Turk & John Wise (KIPAC/Stanford) Miroslav Micic & Steinn Sigurdsson (PSU) Naoki Yoshida (Nagoya) Emanuele Ripamonti (Groningen) Tom Abel First Structure Formation cosmological initial conditions Follow the rest self-consistently: Gravity, Hydro, Chemistry and radiative processes Leads to stars and black holes -> Feedback ... Tom Abel First Light 2x288^3 SPH particles Adaptive ray tracing a la 1/100 of Milky Way (600 kpc box) Abel & Wandelt 2002, MNRAS ~ 13.5 billion years ago 100 such cubes will eventually make up Milky Way Yoshida, Abel, Hernquist & Sugiyama 2003 ApJ; Yoshida, Abel, Hernquist in prep. Tom Abel 21cm observations at arcsecond scales ... First Stars movie Simulation: Tom Abel (KIPAC/Stanford), Greg Bryan (Columbia), Mike Norman (UCSD) Viz: Ralf Kähler (AEI, ZIB), Bob Patterson, Stuart Levy, Donna Cox (NCSA), Tom Abel (KIPAC/Stanford) Tom Abel © “The Unfolding Universe” Discovery Channel 2002 1D implicit adaptive radiation hydrodynamics Ripamonti & Abel 04, unpublished Tom Abel Even in spherical symmetry no predictive theory Omukai & Palla 2003, Tan & McKee 03 Tom Abel Accretion unsolved Stellar masses may be in 30 to 300 solar masses Error bar; not a range! Could be peaked at one value if accretion processes pick out a scale. upper limit: mass supply lower limit: Kelvin Helmholtz ~ accretion time -> Excellent UV emitters Tom Abel HII dynamics Tom Abel also Kiteyama, Yoshida, Susa & Umemura 2004
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