dc.contributor.author | Beccari, G. | |
dc.contributor.author | Petr-Gotzens, M.G. | |
dc.contributor.author | Boffin, H.M.J. | |
dc.contributor.author | Romaniello, M. | |
dc.contributor.author | Fedele, D. | |
dc.contributor.author | Carraro, G. | |
dc.contributor.author | Marchi, G. De | |
dc.contributor.author | de Wit, W.J. | |
dc.contributor.author | Drew, J. E. | |
dc.contributor.author | Kalari, V. M. | |
dc.contributor.author | Manara, Carlo Felice | |
dc.contributor.author | Martin, Eduardo L. | |
dc.contributor.author | Mieske, S. | |
dc.contributor.author | Panagia, N. | |
dc.contributor.author | Testi, L. | |
dc.contributor.author | Vink, Jorick S. | |
dc.contributor.author | Walsh, J. R. | |
dc.contributor.author | Wright, N. J. | |
dc.date.accessioned | 2018-08-16T00:13:44Z | |
dc.date.available | 2018-08-16T00:13:44Z | |
dc.date.issued | 2017-07-27 | |
dc.identifier.citation | Beccari , 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.issn | 0004-6361 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1705.09496v1 | |
dc.identifier.uri | http://hdl.handle.net/2299/20394 | |
dc.description | Reproduced with permission from Astronomy & Astrophysics, © 2017 ESO. Published by EDP Sciences. | |
dc.description.abstract | As 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.extent | 8 | |
dc.format.extent | 1738400 | |
dc.language.iso | eng | |
dc.relation.ispartof | Astronomy & Astrophysics | |
dc.subject | astro-ph.SR | |
dc.subject | astro-ph.GA | |
dc.title | A Tale of Three Cities : OmegaCAM discovers multiple sequences in the color-magnitude diagram of the Orion Nebula Cluster | en |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | Hertfordshire Business School | |
dc.description.status | Peer reviewed | |
rioxxterms.versionofrecord | 10.1051/0004-6361/201730432 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |