THE GAIA-ESO SURVEY: METAL-RICH BANANAS IN THE BULGE

Vista sencilla de ítem
dc.contributor.authorWilliams, Angus A.
dc.contributor.authorEvans, N. W.
dc.contributor.authorMolloy, Matthew
dc.contributor.authorKordopatis, Georges
dc.contributor.authorSmith, M. C.
dc.contributor.authorShen, J.
dc.contributor.authorGilmore, G.
dc.contributor.authorRandich, S.
dc.contributor.authorBensby, T.
dc.contributor.authorFrancois, P.
dc.contributor.authorKoposov, S.E.
dc.contributor.authorRecio-Blanco, A.
dc.contributor.authorBayo, A.
dc.contributor.authorCarraro, G.
dc.contributor.authorCasey, A.
dc.contributor.authorCostado, T.
dc.contributor.authorFranciosini, E.
dc.contributor.authorHourihane, A.
dc.contributor.authorde Laverny, P.
dc.contributor.authorLewis, J.
dc.contributor.authorLind, K.
dc.contributor.authorMagrini, L.
dc.contributor.authorMonaco, L.
dc.contributor.authorMorbidelli, L.
dc.contributor.authorSacco, G. G
dc.contributor.authorWorley, C.
dc.contributor.authorZaggia, S.
dc.contributor.authorMikolaitis, Š.
dc.date.accessioned2016-07-22T16:06:07Z
dc.date.available2016-07-22T16:06:07Z
dc.date.issued2016-06
dc.descriptionIndexación: Web of Sciencees
dc.description.abstractWe analyze the kinematics of similar to 2000 giant stars in the direction of the Galactic bulge, extracted from the Gaia-ESO survey in the region -10 degrees less than or similar to l less than or similar to 10 degrees and -11 degrees less than or similar to b less than or similar to -3 degrees. We find distinct kinematic trends in the metal-rich ([M/H] > 0) and metal-poor ([M/H] < 0) stars in the data. The velocity dispersion of the metal-rich stars drops steeply with latitude, compared to a flat profile in the metal-poor stars, as has been seen previously. We argue that the metal-rich stars in this region are mostly on orbits that support the boxy-peanut shape of the bulge, which naturally explains the drop in their velocity dispersion profile with latitude. The metal-rich stars also exhibit peaky features in their line of sight velocity histograms, particularly along the minor axis of the bulge. We propose that these features are due to stars on resonant orbits supporting the boxy-peanut bulge. This conjecture is strengthened through the comparison of the minor axis data with the velocity histograms of resonant orbits generated in simulations of buckled bars. The "banana" or 2: 1: 2 orbits provide strongly bimodal histograms with narrow velocity peaks that resemble the Gaia-ESO metal-rich data.es
dc.description.urihttp://iopscience.iop.org/article/10.3847/2041-8205/824/2/L29/meta;jsessionid=F562F79C7E819078F53AAC2B886C44D5.c1.iopscience.cld.iop.org
dc.identifier.citationThe Astrophysical Journal Letters, Volume 824, Number 2es
dc.identifier.issn2041-8205
dc.identifier.other10.3847/2041-8205/824/2/L29
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/1140
dc.language.isoenes
dc.publisherIOP PUBLISHINGes
dc.subjectGALAXIES: GENERALes
dc.subjectGalaxies: kinematics and dynamicses
dc.subjectGalaxy: bulgees
dc.subjectMILKY-WAY BULGEes
dc.subjectHIGH-VELOCITY PEAKSes
dc.subjectSPLIT RED CLUMPes
dc.subjectGALACTIC BULGEes
dc.subjectKINEMATICSes
dc.subjectDISKes
dc.titleTHE GAIA-ESO SURVEY: METAL-RICH BANANAS IN THE BULGEes
dc.typeArtículoes
Archivos
Bloque original
Mostrando 1 - 1 de 1
Miniatura
Nombre:
Williams_The_GAIA_ESO_Survey.pdf
Tamaño:
913.87 KB
Formato:
Adobe Portable Document Format
Descripción:
TEXTO COMPLETO INGLES
Descargar
Bloque de licencias
Mostrando 1 - 1 de 1
No hay miniatura disponible
Nombre:
license.txt
Tamaño:
1.71 KB
Formato:
Item-specific license agreed upon to submission
Descripción:
Descargar
Colecciones
FCE - Artículos de Revista