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Lupus DANCe

hal.structure.identifierM2A 2020
dc.contributor.authorGALLI, P. A. B.
hal.structure.identifierM2A 2020
dc.contributor.authorBOUY, H.
hal.structure.identifierM2A 2020
dc.contributor.authorOLIVARES, J.
hal.structure.identifierM2A 2020
dc.contributor.authorMIRET-ROIG, N.
hal.structure.identifierPontifícia Universidade Católica do Rio Grande do Sul [Brasil] = Pontifical Catholic University of Rio Grande do Sul [Brazil] = Université catholique pontificale de Rio Grande do Sul [Brésil] [PUC-RS]
dc.contributor.authorVIEIRA, R. G.
dc.contributor.authorSARRO, L. M.
hal.structure.identifierCentro de Astrobiologia [Madrid] [CAB]
dc.contributor.authorBARRADO, D.
dc.contributor.authorBERIHUETE, A.
hal.structure.identifierInstitut d'Astrophysique de Paris [IAP]
dc.contributor.authorBERTOUT, C.
dc.contributor.authorBERTIN, E.
hal.structure.identifierAstrophysique Interprétation Modélisation [AIM (UMR7158 / UMR_E_9005 / UM_112)]
dc.contributor.authorCUILLANDRE, J.-C.
dc.date.issued2020-11
dc.identifier.issn0004-6361
dc.description.abstractEnContext. Lupus is recognised as one of the closest star-forming regions, but the lack of trigonometric parallaxes in the pre-Gaia era hampered many studies on the kinematic properties of this region and led to incomplete censuses of its stellar population.Aims. We use the second data release of the Gaia space mission combined with published ancillary radial velocity data to revise the census of stars and investigate the 6D structure of the Lupus complex.Methods. We performed a new membership analysis of the Lupus association based on astrometric and photometric data over a field of 160 deg2 around the main molecular clouds of the complex and compared the properties of the various subgroups in this region.Results. We identified 137 high-probability members of the Lupus association of young stars, including 47 stars that had never been reported as members before. Many of the historically known stars associated with the Lupus region identified in previous studies are more likely to be field stars or members of the adjacent Scorpius-Centaurus association. Our new sample of members covers the magnitude and mass range from G ≃ 8 to G ≃ 18 mag and from 0.03 to 2.4 M⊙, respectively. We compared the kinematic properties of the stars projected towards the molecular clouds Lupus 1–6 and showed that these subgroups are located at roughly the same distance (about 160 pc) and move with the same spatial velocity. Our age estimates inferred from stellar models show that the Lupus subgroups are coeval (with median ages ranging from about 1 to 3 Myr). The Lupus association appears to be younger than the population of young stars in the Corona-Australis star-forming region recently investigated by our team using a similar methodology. The initial mass function of the Lupus association inferred from the distribution of spectral types shows little variation compared to other star-forming regions.Conclusions. In this paper, we provide an updated sample of cluster members based on Gaia data and construct the most complete picture of the 3D structure and 3D space motion of the Lupus complex.
dc.description.sponsorshipInitiative d'excellence de l'Université de Bordeaux - ANR-10-IDEX-0003
dc.language.isoen
dc.publisherEDP Sciences
dc.subject.enopen clusters and associations: individual: Lupus
dc.subject.enstars: formation
dc.subject.enstars: distances
dc.subject.enmethods: statistical
dc.subject.enparallaxes
dc.subject.enproper motions
dc.title.enLupus DANCe
dc.title.enCensus of stars and 6D structure with Gaia-DR2 data
dc.typeArticle de revue
dc.identifier.doi10.1051/0004-6361/202038717
dc.subject.halPhysique [physics]/Astrophysique [astro-ph]
bordeaux.journalAstronomy and Astrophysics - A&A
bordeaux.pageA148
bordeaux.volume643
bordeaux.peerReviewedoui
hal.identifierhal-03008649
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03008649v1
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