Kathryn Johnston

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Methods - Sanity Checks - 11 satellites of Milky Way (similar number for M31) => how many baryons to assign to each dark satellite (via “squelching” of low end of luminosity function due to re-ionization - see Bullock, Kravtsov & Weinberg, 2000) - field dwarfs have significant gas content (e.g. Grebel et al , 2003) => how fast to turn baryons into stars (i.e. long timescale for star formation, consistent with earlier talks...) - field dwarfs follow well defined correlations in luminosity and core radius (e.g. Mateo, 1998) => how to embed stars within halos In addition, the model fits: (i) stellar halo luminosity; (ii) Hernquist profile; (iii) distribution of satellite structural properties.
Model for Formation of a Halo Color bar 34-24 mag/arcsec 2 Luminosity-weighted dark matter Embedded King models
Page 1 and 2: Stellar Halos and Satellite Systems
Page 3: Dark matter modeled via merger tree
Page 7 and 8: Features brighter than 30 mag/ arcs
Page 9 and 10: Model for Formation of a Halo - Hal
Page 11 and 12: Abundance Patterns in Satellites vs
Page 17 and 18: ... only stars with [alpha/ Fe]

Kathryn Johnston

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