A cold stellar stream in Pegasus

dc.contributorUniversidade Federal do Rio de Janeiro (UFRJ)
dc.contributorRensselaer Polytechnic Institute
dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2019-10-06T15:56:30Z
dc.date.accessioned2022-12-19T18:38:38Z
dc.date.available2019-10-06T15:56:30Z
dc.date.available2022-12-19T18:38:38Z
dc.date.created2019-10-06T15:56:30Z
dc.date.issued2019-01-01
dc.identifierMonthly Notices of the Royal Astronomical Society, v. 486, n. 1, p. 843-850, 2019.
dc.identifier1365-2966
dc.identifier0035-8711
dc.identifierhttp://hdl.handle.net/11449/188076
dc.identifier10.1093/mnras/stz869
dc.identifier2-s2.0-85072251081
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5369114
dc.description.abstractWe report the serendipitous discovery of a stellar stream in the constellation Pegasus in the south Galactic hemisphere. The stellar stream was detected using the SDSS Data Release 14 by means of a matched filter in the colour-magnitude diagram that is optimized for a stellar population that is 8 Gyr old with [Fe/H] = -0.46 dex, and located at heliocentric distance of 18 kpc. The candidate stream is faint (turn-off point at r0 ∼19.6), sparse and barely visible in SDSS photometry. It is also detected in the (shallower) Pan-STARRs data. The residual stellar density in the (u - g)0, (g - r)0 colour-colour diagram gives the same estimate for the age and [Fe/H] of this stellar population. The stream is located at a Galactic coordinates (l, b) = (79.4°, -24.6°) and extends over 9° (2.5 kpc), with a width of 112 pc. The narrow width suggests a globular cluster progenitor.
dc.languageeng
dc.relationMonthly Notices of the Royal Astronomical Society
dc.rightsAcesso aberto
dc.sourceScopus
dc.subjectGalaxy: halo
dc.subjectGalaxy: stellar content
dc.subjectGalaxy: structure
dc.titleA cold stellar stream in Pegasus
dc.typeArtículos de revistas


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