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On the genealogy of the Orphan Stream
dc.contributor.authorSales, Laura V.en_US
dc.contributor.authorHelmi, Aminaen_US
dc.contributor.authorStarkenburg, Elseen_US
dc.contributor.authorMorrison, Heather L.en_US
dc.contributor.authorEngle, Ethanen_US
dc.contributor.authorHarding, Paulen_US
dc.contributor.authorMateo, Marioen_US
dc.contributor.authorOlszewski, Edward W.en_US
dc.contributor.authorSivarani, Thirupathien_US
dc.date.accessioned2010-06-01T20:33:25Z
dc.date.available2010-06-01T20:33:25Z
dc.date.issued2008-09-21en_US
dc.identifier.citationSales, Laura V.; Helmi, Amina; Starkenburg, Else; Morrison, Heather L.; Engle, Ethan; Harding, Paul; Mateo, Mario; Olszewski, Edward W.; Sivarani, Thirupathi (2008). "On the genealogy of the Orphan Stream." Monthly Notices of the Royal Astronomical Society 389(3): 1391-1398. <http://hdl.handle.net/2027.42/73665>en_US
dc.identifier.issn0035-8711en_US
dc.identifier.issn1365-2966en_US
dc.identifier.urihttps://hdl.handle.net/2027.42/73665
dc.description.abstractWe use N -body simulations to explore the origin and a plausible orbit for the Orphan Stream, one of the faintest substructures discovered so far in the outer halo of our Galaxy. We are able to reproduce its position, velocity and distance measurements by appealing to a single wrap of a double-component satellite galaxy. We find that the progenitor of the Orphan Stream could have been an object similar to today's Milky Way dwarfs, such as Carina, Draco, Leo II or Sculptor; and unlikely to be connected to Complex A or Ursa Major II. Our models suggest that such progenitors, if accreted on orbits with apocentres smaller than ∼35 kpc, are likely to give rise to very low surface brightness streams, which may be hiding in the outer halo and remain largely undetected with current techniques. The systematic discovery of these ghostly substructures may well require wide field spectroscopic surveys of the Milky Way's outer stellar halo.en_US
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dc.format.extent3109 bytes
dc.format.mimetypeapplication/pdf
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dc.publisherBlackwell Publishing Ltden_US
dc.rightsJournal compilation © 2008 RASen_US
dc.subject.otherGalaxies: Evolutionen_US
dc.subject.otherGalaxies: Formationen_US
dc.subject.otherGalaxies: Haloesen_US
dc.subject.otherGalaxies: Kinematics and Dynamicsen_US
dc.titleOn the genealogy of the Orphan Streamen_US
dc.typeArticleen_US
dc.subject.hlbsecondlevelAstronomyen_US
dc.subject.hlbtoplevelScienceen_US
dc.description.peerreviewedPeer Revieweden_US
dc.contributor.affiliationumDepartment of Astronomy, University of Michigan, Ann Arbor, MI 48109, USAen_US
dc.contributor.affiliationumDepartment of Physics & Astronomy and JINA: Joint Institute for Nuclear Astrophysics, Michigan State University, MI, USAen_US
dc.contributor.affiliationotherKapteyn Astronomical Institute, University of Groningen, PO Box 800, 9700AV Groningen, the Netherlandsen_US
dc.contributor.affiliationotherDepartment of Astronomy, Case Western Reserve University, Cleveland, OH 44106-7215, USAen_US
dc.contributor.affiliationotherSteward Observatory, University of Arizona, Tucson, AZ 85721, USAen_US
dc.description.bitstreamurlhttp://deepblue.lib.umich.edu/bitstream/2027.42/73665/1/j.1365-2966.2008.13659.x.pdf
dc.identifier.doi10.1111/j.1365-2966.2008.13659.xen_US
dc.identifier.sourceMonthly Notices of the Royal Astronomical Societyen_US
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