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dc.contributor.authorMartin, Nicolas F.
dc.contributor.authorNidever, David L.
dc.contributor.authorBesla, Gurtina
dc.contributor.authorOlsen, Knut
dc.contributor.authorWalker, Alistair R.
dc.contributor.authorVivas, A. Katherina
dc.contributor.authorGruendl, Robert A.
dc.contributor.authorKaleida, Catherine C.
dc.contributor.authorMuñoz, Ricardo R.
dc.contributor.authorBlum, Robert D.
dc.contributor.authorSaha, Abhijit
dc.contributor.authorConn, Blair C.
dc.contributor.authorBell, Eric F.
dc.contributor.authorChu, You Hua
dc.contributor.authorCioni, M-R.L.
dc.contributor.authorDe Boer, Thomas J. L.
dc.contributor.authorGallart, Carme
dc.contributor.authorJin, Shoko
dc.contributor.authorKunder, Andrea
dc.contributor.authorMajewski, Steven R.
dc.contributor.authorMartinez-Delgado, David
dc.contributor.authorMonachesi, Antonela
dc.contributor.authorMonelli, Matteo
dc.contributor.authorMonteagudo, Lara
dc.contributor.authorNoël, Noelia E.D.
dc.contributor.authorOlszewski, Edward W.
dc.contributor.authorStringfellow, Guy S.
dc.contributor.authorVan Der Marel, Roeland P.
dc.contributor.authorZaritsky, Dennis
dc.date.accessioned2015-06-01T13:36:01Z
dc.date.available2015-06-01T13:36:01Z
dc.date.issued2015-05-01
dc.identifier.citationMartin , N F , Nidever , D L , Besla , G , Olsen , K , Walker , A R , Vivas , A K , Gruendl , R A , Kaleida , C C , Muñoz , R R , Blum , R D , Saha , A , Conn , B C , Bell , E F , Chu , Y H , Cioni , M-RL , De Boer , T J L , Gallart , C , Jin , S , Kunder , A , Majewski , S R , Martinez-Delgado , D , Monachesi , A , Monelli , M , Monteagudo , L , Noël , N E D , Olszewski , E W , Stringfellow , G S , Van Der Marel , R P & Zaritsky , D 2015 , ' Hydra II: a faint and compact milky way dwarf galaxy found in the survey of the magellanic stellar history ' , Astrophysical Journal Letters , vol. 804 , no. 1 , L5 . https://doi.org/10.1088/2041-8205/804/1/L5
dc.identifier.issn2041-8205
dc.identifier.urihttp://hdl.handle.net/2299/15966
dc.descriptionDate of Acceptance: 31/03/2015
dc.description.abstractWe present the discovery of a new dwarf galaxy, Hydra II, found serendipitously within the data from the ongoing Survey of the Magellanic Stellar History conducted with the Dark Energy Camera on the Blanco 4 m Telescope. The new satellite is compact (r_h = 68 ± 11 pc) and faint (M_V = -4.8 ± 0.3), but well within the realm of dwarf galaxies. The stellar distribution of Hydra II in the color-magnitude diagram is well-described by a metal-poor ([Fe/H] = -2.2) and old (13 Gyr) isochrone and shows a distinct blue horizontal branch, some possible red clump stars, and faint stars that are suggestive of blue stragglers. At a heliocentric distance of 134 ± 10 kpc, Hydra II is located in a region of the Galactic halo that models have suggested may host material from the leading arm of the Magellanic Stream. A comparison with N-body simulations hints that the new dwarf galaxy could be or could have been a satellite of the Magellanic Clouds.en
dc.format.extent714477
dc.language.isoeng
dc.relation.ispartofAstrophysical Journal Letters
dc.subjectgalaxies: individual (Hydra II)
dc.subjectLocal Group
dc.subjectMagellanic Clouds
dc.titleHydra II: a faint and compact milky way dwarf galaxy found in the survey of the magellanic stellar historyen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionScience & Technology Research Institute
dc.contributor.institutionCentre for Astrophysics Research (CAR)
dc.description.statusPeer reviewed
rioxxterms.versionofrecord10.1088/2041-8205/804/1/L5
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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