dc.contributor.author | Berlanas, S. R. | |
dc.contributor.author | Wright, N. | |
dc.contributor.author | Herrero, A. | |
dc.contributor.author | Drew, J. E. | |
dc.contributor.author | Lennon, D. J. | |
dc.date.accessioned | 2019-04-24T14:04:26Z | |
dc.date.available | 2019-04-24T14:04:26Z | |
dc.date.issued | 2019-04-01 | |
dc.identifier.citation | Berlanas , S R , Wright , N , Herrero , A , Drew , J E & Lennon , D J 2019 , ' Disentangling the spatial substructure of Cygnus OB2 from Gaia DR2 ' , Monthly Notices of the Royal Astronomical Society , vol. 484 , no. 2 , pp. 1838–1842 . https://doi.org/10.1093/mnras/stz117 | |
dc.identifier.issn | 0035-8711 | |
dc.identifier.other | ArXiv: http://arxiv.org/abs/1901.02959v1 | |
dc.identifier.uri | http://hdl.handle.net/2299/21297 | |
dc.description | © 2019 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society | |
dc.description.abstract | For the first time, we have explored the spatial substructure of the Cygnus OB2 association using parallaxes from the recent second Gaia data release. We find significant line-of-sight substructure within the association, which we quantify using a parametrized model that reproduces the observed parallax distribution. This inference approach is necessary due to the non-linearity of the parallax distance transformation and the asymmetry of the resulting probability distribution. Using a Markov Chain Monte Carlo ensemble sampler and an unbinned maximum likelihood test, we identify two different stellar groups superposed on the association. We find the main Cygnus OB2 group at ∼1760 pc, further away than recent estimates have envisaged, and a foreground group at ∼1350 pc. We also calculate individual membership probabilities and identify outliers as possible non-members of the association. | en |
dc.format.extent | 5 | |
dc.format.extent | 816988 | |
dc.language.iso | eng | |
dc.relation.ispartof | Monthly Notices of the Royal Astronomical Society | |
dc.subject | astro-ph.SR | |
dc.subject | astro-ph.GA | |
dc.subject | Stars: distances | |
dc.subject | Associations: individual: Cygnus OB2 | |
dc.subject | Stars: early-type | |
dc.subject | Stars: massive | |
dc.subject | Open clusters | |
dc.subject | Parallaxes | |
dc.subject | Astrometry | |
dc.subject | General Physics and Astronomy | |
dc.subject | Astronomy and Astrophysics | |
dc.subject | Space and Planetary Science | |
dc.title | Disentangling the spatial substructure of Cygnus OB2 from Gaia DR2 | en |
dc.contributor.institution | Centre for Astrophysics Research (CAR) | |
dc.contributor.institution | School of Physics, Astronomy and Mathematics | |
dc.description.status | Peer reviewed | |
dc.identifier.url | http://www.scopus.com/inward/record.url?scp=85063369906&partnerID=8YFLogxK | |
dc.identifier.url | https://arxiv.org/abs/1901.02959 | |
dc.identifier.url | https://academic.oup.com/mnras/article/484/2/1838/5289922 | |
rioxxterms.versionofrecord | 10.1093/mnras/stz117 | |
rioxxterms.type | Journal Article/Review | |
herts.preservation.rarelyaccessed | true | |