A cutout of the map of M81’s stellar halo in resolved RGB stars (Smercina et al. 2017, in preparation). The colors correspond to the metallicity bins defined on the CMD in the top left figure. The known galaxies in the field are labeled. d1005+68 is located at the bottom left of the map, indicated by a black arrow. It appears as a significant overdensity of blue (metal-poor) RGB stars, very near to the dwarf spheroidal, BK5N. Credit: Smercina et al., 2017.
Astronomers have detected a new faint dwarf spheroidal galaxy using Japan’s Subaru Telescope located in Hawaii. The newly found dwarf, designated d1005+68, belongs to a nearby galaxy group known as the M81 Group. Dwarf galaxies are small galaxies composed of about 100 million up to several billion stars...
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