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Date and Time of the Query: 2019-08-17 T16:38:54 PDT
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For refcode 2013ApJ...779L..10M:
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2013ApJ...779L..10M Perseus I: A Distant Satellite Dwarf Galaxy of Andromeda 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 Abstract. 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 3pi survey. Located 27.^degree^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 (M_V_ = -10.3 +/- 0.7), with an exponential half-light radius of r_h_ = 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. Key words: galaxies: individual: Perseus I Andromeda XXXIII, Local Group
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