Journal
ASTROPHYSICAL JOURNAL LETTERS
Volume 742, Issue 1, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/2041-8205/742/1/L14
Keywords
galaxies: dwarf; galaxies: individual (And XXVIII); Local Group
Categories
Funding
- NSF [AST 1008342]
- German Research Foundation (DFG) [SFB 881, A3]
- Alfred P. Sloan Foundation
- National Science Foundation
- U.S. Department of Energy
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1008342] Funding Source: National Science Foundation
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We report the discovery of a new dwarf galaxy, Andromeda XXVIII, using data from the recently released Sloan Digital Sky Survey Data Release 8. The galaxy is a likely satellite of Andromeda, and, at a separation of 365(-1)(+17) kpc, would be one of the most distant of Andromeda's satellites. Its heliocentric distance is 650(-80)(+150) kpc, and analysis of its structure and luminosity shows that it has an absolute magnitude of M-V = -8.5(-1.0)(+0.4) and half-light radius of r(h) = 210(-50)(+60) pc, similar to many other faint Local Group dwarfs. With presently available imaging we are unable to determine whether there is ongoing or recent star formation, which prevents us from classifying it as a dwarf spheroidal or a dwarf irregular.
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