Leo IV

Bandcamp Leo IV : Wikipedia

Leo IV (2013)
dedicated to Elijah Quetin

Synthesis Engine: Ableton Live
Duration: 21 minutes

Leo IV is a dwarf spheroidal galaxy situated in the Leo constellation and discovered in 2006 in the data obtained by Sloan Digital Sky Survey. The galaxy is located at the distance of about 160 kpc from the Sun and moves away from the Sun with the velocity of about 130 km/s. It is classified as a dwarf spheroidal galaxy (dSph) meaning that it has an approximately round shape with the half-light radius of about 130 pc.

Leo IV is one of the smallest and faintest satellites of the Milky Way—its integrated luminosity is about 15,000 times that of the Sun (absolute visible magnitude of −5.5 ± 0.3), which is much lower than the luminosity of a typical globular cluster. However, its mass is about 1.5 million solar masses, which means that Leo’s mass to light ratio is around 150. A high mass to light ratio implies that Leo IV is dominated by the dark matter.