Leo V (dwarf galaxy)
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Lua error in Module:Infobox at line 235: malformed pattern (missing ']'). Leo V is a dwarf spheroidal galaxy situated in the Leo constellation and discovered in 2007 in the data obtained by the Sloan Digital Sky Survey.[2] The galaxy is located at the distance of about 180 kpc from the Sun and moves away from the Sun with the velocity of about 173 km/s.[2] It is classified as a dwarf spheroidal galaxy (dSph) meaning that it has an approximately spherical shape with the half-light radius of about 130 pc.[3][note 1]
Leo V is one of the smallest and faintest satellites of the Milky Way—its integrated luminosity is about 10,000 times that of the Sun (absolute visible magnitude of about −5.2 ± 0.4),[note 1] which is much lower than the luminosity of a typical globular cluster.[3] However, its mass is about 330 thousands solar masses, which means that Leo's V mass to light ratio is around 75. A relatively high mass to light ratio implies that Leo V is dominated by dark matter.[4] The stellar population of Leo V consists mainly of old stars formed more than 12 billion years ago.[2] The metallicity of these stars is also very low at [Fe/H] ≈ −2.0 ± 0.2, which means that they contain 100 times less heavy elements than the Sun.[4]
The galaxy is located only 3 degrees away from another Milky Way's satellite, Leo IV. The latter is also closer to the Sun by 20 kpc. These two galaxies may be physically associated with each other.[2] There is evidence that they are connected by a star bridge.[3]
Notes
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<references />, or <references group="..." />References
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<references />, or <references group="..." />| Location |
Milky Way → Milky Way subgroup → Local Group → Virgo Supercluster → Laniakea Supercluster → Observable universe → Universe
Each arrow (→) may be read as "within" or "part of". |
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| Galactic core | |||||||||
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- ↑ 4.0 4.1 Lua error in package.lua at line 80: module 'strict' not found.
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