%0 Journal Article
%@ 1538-4357
%A Li, TS
%A Balbinot, E
%A Mondrik, N
%A Marshall, JL
%A Yanny, B
%A Bechtol, K
%A Drlica-Wagner, A
%A Oscar, D
%A Santiago, B
%A Simon, JD
%A Vivas, AK
%A Walker, AR
%A Wang, MY
%A Abbott, TMC
%A Abdalla, FB
%A Benorr-Levy, A
%A Bernstein, GM
%A Bertin, E
%A Brooks, D
%A Burke, DL
%A Carnero Rosell, A
%A Kind, MC
%A Carretero, J
%A da Costa, LN
%A DePoy, DL
%A Desai, S
%A Diehl, HT
%A Doel, P
%A Estrada, J
%A Finley, DA
%A Flaugher, B
%A Frieman, J
%A Gruen, D
%A Gruendl, RA
%A Gutierrez, G
%A Honscheid, K
%A James, DJ
%A Kuehn, K
%A Kuropatkin, N
%A Lahav, O
%A Maia, MAG
%A March, M
%A Martini, P
%A Ogando, R
%A Plazas, AA
%A Reil, K
%A Romer, AK
%A Roodman, A
%A Sanchez, E
%A Scarpine, V
%A Schubnell, M
%A Sevilla-Noarbe, I
%A Smith, RC
%A Soares-Santos, M
%A Sobreira, F
%A Suchyta, E
%A Swanson, MEC
%A Tarle, G
%A Tucker, D
%A Zhang, Y
%D 2016
%F discovery:10055816
%I IOP PUBLISHING LTD
%J The Astrophysical Journal
%K galaxy: formation, galaxy: halo, galaxy: structure, local group, DIGITAL SKY SURVEY, EXPLORING HALO SUBSTRUCTURE, TRACING GALAXY FORMATION, HERCULES-AQUILA CLOUD, WAY GLOBULAR-CLUSTERS, MILKY-WAY, PISCES OVERDENSITY, DWARF GALAXY, TRIANGULUM-ANDROMEDA, SATELLITE GALAXIES
%N 2
%T Discovery of a stellar overdensity in eridanus–phoenix in the dark energy survey
%U https://discovery.ucl.ac.uk/id/eprint/10055816/
%V 817
%X We report the discovery of an excess of main sequence turn-off stars in the direction of the constellations  of Eridanus and Phoenix from the first year data of the Dark Energy Survey (DES). The  Eridanus-Phoenix (EriPhe) overdensity is centered around l ∼ 285◦ and b ∼ −60◦ and spans at least  30◦  in longitude and 10◦  in latitude. The Poisson significance of the detection is at least 9σ. The  stellar population in the overdense region is similar in brightness and color to that of the nearby globular  cluster NGC 1261, indicating that the heliocentric distance of EriPhe is about d ∼ 16 kpc. The  extent of EriPhe in projection is therefore at least ∼ 4 kpc by ∼ 3 kpc. On the sky, this overdensity  is located between NGC 1261 and a new stellar stream discovered by DES at a similar heliocentric  distance, the so-called Phoenix Stream. Given their similar distance and proximity to each other, it is  possible that these three structures may be kinematically associated. Alternatively, the EriPhe overdensity  is morphologically similar to the Virgo overdensity and the Hercules-Aquila cloud, which also  lie at a similar Galactocentric distance. These three overdensities lie along a polar plane separated by  ∼ 120◦ and may share a common origin. Spectroscopic follow-up observations of the stars in EriPhe  are required to fully understand the nature of this overdensity
%Z This version is the version of record. For information on re-use, please refer to the publisher’s terms and conditions.