Leo T
Dwarf spheroidal Galaxy in the constellation Leo / From Wikipedia, the free encyclopedia
Leo T is a dwarf galaxy situated in the Leo constellation and discovered in 2006 in the data obtained by Sloan Digital Sky Survey.[2] The galaxy is located at the distance of about 420 kpc from the Sun and moves away from the Sun with the velocity of about 35 km/s.[2][3] The velocity with respect to the Milky Way is around −60 km/s implying a slow infall onto the Milky Way.[3] Leo T is classified as a transitional object ('T' in the name) between dwarf spheroidal galaxies (dSph) and dwarf irregular galaxies (dIrr). Its half-light radius is about 180 pc.[2]
Leo T Dwarf Galaxy[1] | |
---|---|
Observation data (J2000 epoch) | |
Constellation | Leo |
Right ascension | 09h 34m 53.4s[1] |
Declination | +17° 03′ 05″[1] |
Distance | 1,365 kly (420 kpc)[2] |
Apparent magnitude (V) | 16[2] |
Characteristics | |
Type | dSph/dIrr |
Apparent size (V) | 2.8′[2] |
Other designations | |
Leo T,[1] PGC 4713564 |
Leo T is one of the smallest and faintest galaxies in the Local Group—its integrated luminosity is about 40,000 times that of the Sun (absolute visible magnitude of about −7.1).[note 1][2] However, its mass is about 8 million solar masses, which means that Leo's mass to light ratio is around 140. A high mass to light ratio implies that Leo T is dominated by dark matter.[3]