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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



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ID: 693580.0, MPI für Astronomie / Publikationen_mpia
Perseus I: A distant satellite dwarf galaxy of Andromeda
Authors:Martin, Nicolas F.; Schlafly, Edward F.; Slater, Colin T.; Bernard, Edouard J.; Rix, Hans-Walter; Bell, Eric F.; Ferguson, Annette M. N.; Finkbeiner, Douglas P.; Laevens, Benjamin P. M.; Burgett, William S.; Chambers, Kenneth C.; Draper, Peter W.; Hodapp, Klaus W.; Kaiser, Nicholas; Kudritzki, Rolf-Peter; Magnier, Eugene A.; Metcalfe, Nigel; Morgan, Jeffrey S.; Price, Paul A.; Tonry, John L.; Wainscoat, Richard J.; Waters, Christopher
Language:English
Date of Publication (YYYY-MM-DD):2013
Title of Journal:The Astrophysical Journal Letters
Volume:779
Issue / Number:1
Start Page:id. L10 (5 pp)
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:We present the discovery of a new dwarf galaxy, Perseus I/Andromeda XXXIII, found in the vicinity of Andromeda (M31) in stacked imaging data from the Pan-STARRS1 3π survey. Located 27.°9 away from M31, Perseus I has a heliocentric distance of 785 ± 65 kpc, compatible with it being a satellite of M31 at 374^{+14}_{-10}\\\\,kpc from its host. The properties of Perseus I are typical for a reasonably bright dwarf galaxy (MV = –10.3 ± 0.7), with an exponential half-light radius of rh = 1.7 ± 0.4 arcmin or r_h = 400^{+105}_{-85}\\\\,pc at this distance, and a moderate ellipticity (\\\\epsilon = 0.43^{+0.15}_{-0.17}). The late discovery of Perseus I is due to its fairly low surface brightness (\\\\mu _0=25.7^{+1.0}_{-0.9} mag arcsec–2), and to the previous lack of deep, high quality photometric data in this region. If confirmed to be a companion of M31, the location of Perseus I, far east from its host, could place interesting constraints on the bulk motion of the satellite system of M31.
Free Keywords:galaxies: individual: Perseus I Andromeda XXXIII; Local Group
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:ISSN:0004-637X [ID No:1]
URL:http://cdsads.u-strasbg.fr/abs/2013ApJ...779L..10M [ID No:2]
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