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dc.contributor.authorErkal, Denisen
dc.contributor.authorBelokurov, Vasilyen
dc.date.accessioned2015-10-14T10:54:32Z
dc.date.available2015-10-14T10:54:32Z
dc.date.issued2015-10-20en
dc.identifier.citationMonthly Notices of the Royal Astronomical Society 2015, 454(4), 3542-3558. doi: 10.1093/mnras/stv2122en
dc.identifier.issn0035-8711
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/251453
dc.description.abstractCold or Warm, the Dark Matter substructure spectrum must extend to objects with masses as low as 10⁷M☉ , according to the most recent Lyman-α measurements. Around a Milky Waylike galaxy, more than a thousand of these subhaloes will not be able to form stars but are dense enough to survive even deep down in the potential well of their host. There, within the stellar halo, these dark pellets will bombard tidal streams as they travel around the Galaxy, causing small but recognizable damage to the stream density distribution. The detection and characterization of these stream ruptures will allow us to constrain the details of the subhalostream interaction. In this work, for the first time, we will demonstrate how the properties of a subhalo, most importantly its mass and size, can be reliably inferred from the gap it produces in a tidal stream. For a range of realistic observational setups, mimicking e.g. SDSS, DES, Gaia and LSST data, we find that it is possible to measure the complete set of properties (including the phase-space coordinates during the flyby) of dark perturbers with M > 10⁷M ☉, up to a 1d degeneracy between the mass and velocity.
dc.description.sponsorshipThe research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Programme (FP/2007- 2013)/ERC Grant Agreement no. 308024.
dc.languageEnglishen
dc.language.isoenen
dc.publisherOxford University Press
dc.subjectcosmology: theoryen
dc.subjectdark matteren
dc.subjectgalaxies: haloesen
dc.subjectgalaxies: kinematics and dynamicsen
dc.subjectgalaxies: structureen
dc.subjectastrometry, surveys, proper motionsen
dc.titleProperties of Dark Subhaloes from Gaps in Tidal Streamsen
dc.typeArticle
dc.description.versionThis is the author accepted manuscript. The final version is available from Oxford University Press via http://dx.doi.org/10.1093/mnras/stv2122en
prism.endingPage3558
prism.publicationDate2015en
prism.publicationNameMonthly Notices of the Royal Astronomical Societyen
prism.startingPage3542
prism.volume454en
dc.rioxxterms.funderERC
dc.rioxxterms.projectid308024
rioxxterms.versionofrecord10.1093/mnras/stv2122en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2015-10-20en
dc.contributor.orcidBelokurov, Vasily [0000-0002-0038-9584]
dc.identifier.eissn1365-2966
rioxxterms.typeJournal Article/Reviewen


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