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dc.contributor.authorMonguió, Maria
dc.contributor.authorGrosbøl, Preben
dc.contributor.authorFigueras, Francesca
dc.date.accessioned2017-07-13T16:58:52Z
dc.date.available2017-07-13T16:58:52Z
dc.date.issued2015-03-20
dc.identifier.citationMonguió , M , Grosbøl , P & Figueras , F 2015 , ' First detection of the field star overdensity in the Perseus arm ' , Astronomy & Astrophysics , vol. 577 . https://doi.org/10.1051/0004-6361/201424896
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 9912768
dc.identifier.otherPURE UUID: b6220519-630d-4676-9aaa-d15b51272ba2
dc.identifier.otherArXiv: http://arxiv.org/abs/1503.04600v1
dc.identifier.otherScopus: 84930505621
dc.identifier.urihttp://hdl.handle.net/2299/18914
dc.descriptionM. Monguió, P. Grosbøl, and F. Figueras, “First detection of the field star overdensity in the Perseus arm”, Astronomy & Astrophysics, Vol. 577, May 2015. This version of record is available online at: https://doi.org/10.1051/0004-6361/201424896 Reproduced with Permission from Astronomy and Astrophysics, © ESO 2016.
dc.description.abstractAims. The main goal of this study is to detect the stellar overdensity associated with the Perseus arm in the anticenter direction. Methods. We used the physical parameters derived from Str\"omgren photometric data to compute the surface density distribution as a function of galactocentric distance for different samples of intermediate young stars. The radial distribution of the interstellar absorption has also been derived. Results. We detected the Perseus arm stellar overdensity at 1.6+-0.2 kpc from the Sun with a significance of 4-5{\sigma} and a surface density amplitude of around 10%, slightly depending on the sample used. Values for the radial scale length of the Galactic disk have been simultaneously fitted obtaining values in the range [2.9,3.5] kpc for the population of the B4-A1 stars. Moreover, the interstellar visual absorption distribution is congruent with a dust layer in front of the Perseus arm. Conclusions. This is the first time that the presence of the Perseus arm stellar overdensity has been detected through individual star counts, and its location matches a variation in the dust distribution. The offset between the dust lane and the overdensity indicates that the Perseus arm is placed inside the co-rotation radius of the Milky Way spiral pattern.en
dc.format.extent11
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysics
dc.rightsOpen
dc.subjectastro-ph.GA
dc.titleFirst detection of the field star overdensity in the Perseus armen
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.description.statusPeer reviewed
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Published version
dcterms.dateAccepted2015-03-20
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1051/0004-6361/201424896
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeOpen


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