The First Galaxies and the Likely Discovery of Their Fossils in the Local Group

Table 1

Number of observed satellites versus number of dark halos with 𝑣_max(𝑡)>20 km s−1 (i.e., non pre-reionization fossils) for the Milky Way.

Distance from center	Luminous dwarfs	Dark halos with 𝑣max(𝑡)>20 km s−1 via
		Lactea I sim.		Aquarius sim.
		Today	Any time	Today	Any time
<200 kpc	176 to 330	14	36±8	34	91±20
<417 kpc	304 to 576	28	73±16	69	182±40