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Authordc.contributor.authorWright, Nicholas J. 
Authordc.contributor.authorJeffries, R. D. 
Authordc.contributor.authorJackson, R. J. 
Authordc.contributor.authorBayo, A. 
Authordc.contributor.authorBonito, R. 
Authordc.contributor.authorDamiani, F. 
Authordc.contributor.authorKalari, V. 
Authordc.contributor.authorLanzafame, A. C. 
Authordc.contributor.authorPancino, E. 
Authordc.contributor.authorParker, R. J. 
Authordc.contributor.authorPrisinzano, L. 
Authordc.contributor.authorRandich, S. 
Authordc.contributor.authorVink, J. S. 
Authordc.contributor.authorAlfaro, E. J. 
Authordc.contributor.authorBergemann, M. 
Authordc.contributor.authorFranciosini, E. 
Authordc.contributor.authorGilmore, G. 
Authordc.contributor.authorGonneau, A. 
Authordc.contributor.authorHourihane, 
Admission datedc.date.accessioned2019-10-30T15:28:57Z
Available datedc.date.available2019-10-30T15:28:57Z
Publication datedc.date.issued2019
Cita de ítemdc.identifier.citationMonthly Notices of the Royal Astronomical Society, Volumen 486, Issue 2, 2019, Pages 2477-2493
Identifierdc.identifier.issn13652966
Identifierdc.identifier.issn00358711
Identifierdc.identifier.other10.1093/mnras/stz870
Identifierdc.identifier.urihttps://repositorio.uchile.cl/handle/2250/172427
Abstractdc.description.abstractThe combination of precise radial velocities from multi-object spectroscopy and highly accurate proper motions from Gaia DR2 opens up the possibility for detailed 3D kinematic studies of young star-forming regions and clusters. Here, we perform such an analysis by combining Gaia-ESO Survey spectroscopy with Gaia astrometry for ∼900 members of the Lagoon Nebula cluster, NGC 6530. We measure the 3D velocity dispersion of the region to be 5.35+0.39 -0.34 km s-1, which is large enough to suggest the region is gravitationally unbound. The velocity ellipsoid is anisotropic, implying that the region is not sufficiently dynamically evolved to achieve isotropy, though the central part of NGC 6530 does exhibit velocity isotropy that suggests sufficient mixing has occurred in this denser part. We find strong evidence that the stellar population is expanding, though this is preferentially occurring in the declination direction and there is very little evidence for expansion in the right ascension direction. This argues against a simple radial expansion pattern, as predicted by models of residual gas expulsion. We discuss these findings in the context of cluster formation, evolution, and disruption theories.
Lenguagedc.language.isoen
Publisherdc.publisherOxford University Press
Type of licensedc.rightsAttribution-NonCommercial-NoDerivs 3.0 Chile
Link to Licensedc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/cl/
Sourcedc.sourceMonthly Notices of the Royal Astronomical Society
Keywordsdc.subjectopen clusters and associations: individual: Lagoon Nebula, NGC 6530, M8.
Keywordsdc.subjectstars: formation
Keywordsdc.subjectstars: kinematics and dynamics
Títulodc.titleThe Gaia-ESO Survey: Asymmetric expansion of the Lagoon Nebula cluster NGC 6530 from GES and Gaia DR2
Document typedc.typeArtículo de revista
dcterms.accessRightsdcterms.accessRightsAcceso Abierto
Catalogueruchile.catalogadorSCOPUS
Indexationuchile.indexArtículo de publicación SCOPUS
uchile.cosechauchile.cosechaSI


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Attribution-NonCommercial-NoDerivs 3.0 Chile
Except where otherwise noted, this item's license is described as Attribution-NonCommercial-NoDerivs 3.0 Chile