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dc.contributor.authorBeccari, G.
dc.contributor.authorPetr-Gotzens, M.G.
dc.contributor.authorBoffin, H.M.J.
dc.contributor.authorRomaniello, M.
dc.contributor.authorFedele, D.
dc.contributor.authorCarraro, G.
dc.contributor.authorMarchi, G. De
dc.contributor.authorde Wit, W.J.
dc.contributor.authorDrew, J. E.
dc.contributor.authorKalari, V. M.
dc.contributor.authorManara, Carlo Felice
dc.contributor.authorMartin, Eduardo L.
dc.contributor.authorMieske, S.
dc.contributor.authorPanagia, N.
dc.contributor.authorTesti, L.
dc.contributor.authorVink, Jorick S.
dc.contributor.authorWalsh, J. R.
dc.contributor.authorWright, N. J.
dc.date.accessioned2018-08-16T00:13:44Z
dc.date.available2018-08-16T00:13:44Z
dc.date.issued2017-07-27
dc.identifier.citationBeccari , G , Petr-Gotzens , M G , Boffin , H M J , Romaniello , M , Fedele , D , Carraro , G , Marchi , G D , de Wit , W J , Drew , J E , Kalari , V M , Manara , C F , Martin , E L , Mieske , S , Panagia , N , Testi , L , Vink , J S , Walsh , J R & Wright , N J 2017 , ' A Tale of Three Cities : OmegaCAM discovers multiple sequences in the color-magnitude diagram of the Orion Nebula Cluster ' , Astronomy & Astrophysics , vol. 604 , no. A&A , A22 . https://doi.org/10.1051/0004-6361/201730432
dc.identifier.issn0004-6361
dc.identifier.otherPURE: 12322690
dc.identifier.otherPURE UUID: 404071a7-7f61-489f-bcd5-d28a80b2accf
dc.identifier.otherArXiv: http://arxiv.org/abs/1705.09496v1
dc.identifier.otherScopus: 85026517325
dc.identifier.urihttp://hdl.handle.net/2299/20394
dc.descriptionReproduced with permission from Astronomy & Astrophysics, © 2017 ESO. Published by EDP Sciences.
dc.description.abstractAs part of the Accretion Discs in H$\alpha$ with OmegaCAM (ADHOC) survey, we imaged in r, i and H-alpha a region of 12x8 square degrees around the Orion Nebula Cluster. Thanks to the high-quality photometry obtained, we discovered three well-separated pre-main sequences in the color-magnitude diagram. The populations are all concentrated towards the cluster's center. Although several explanations can be invoked to explain these sequences we are left with two competitive, but intriguing, scenarios: a population of unresolved binaries with an exotic mass ratio distribution or three populations with different ages. Independent high-resolution spectroscopy supports the presence of discrete episodes of star formation, each separated by about a million years. The stars from the two putative youngest populations rotate faster than the older ones, in agreement with the evolution of stellar rotation observed in pre-main sequence stars younger than 4 Myr in several star forming regions. Whatever the final explanation, our results prompt for a revised look at the formation mode and early evolution of stars in clusters.en
dc.format.extent8
dc.language.isoeng
dc.relation.ispartofAstronomy & Astrophysics
dc.subjectastro-ph.SR
dc.subjectastro-ph.GA
dc.titleA Tale of Three Cities : OmegaCAM discovers multiple sequences in the color-magnitude diagram of the Orion Nebula Clusteren
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionHertfordshire Business School
dc.description.statusPeer reviewed
rioxxterms.versionVoR
rioxxterms.versionofrecordhttps://doi.org/10.1051/0004-6361/201730432
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue


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