DISCOVERY OF RR LYRAE STARS IN THE NUCLEAR BULGE OF THE MILKY WAY

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dc.contributor.authorMinniti, D
dc.contributor.authorRamos, RC
dc.contributor.authorZoccali, M
dc.contributor.authorRejkuba, M
dc.contributor.authorGonzalez, OA
dc.contributor.authorValenti, E
dc.contributor.authorGran, F
dc.date.accessioned2017-03-09T20:01:56Z
dc.date.available2017-03-09T20:01:56Z
dc.date.issued2016-10
dc.descriptionIndexación: Web of Sciencees
dc.description.abstractGalactic nuclei, such as that of the Milky Way, are extreme regions with high stellar densities, and in most cases, the hosts of a supermassive black hole. One of the scenarios proposed for the formation of the Galactic nucleus is merging of primordial globular clusters. An implication of this model is that this region should host stars that are characteristically found in old Milky Way globular clusters. RR Lyrae stars are primary distance indicators, well known representatives of old and metal-poor stellar populations, and therefore are regularly found in globular clusters. Here we report the discovery of a dozen RR Lyrae type ab stars in the vicinity of the Galactic center, i.e., in the so-called nuclear stellar bulge of the Milky Way. This discovery provides the first direct observational evidence that the Galactic nuclear stellar bulge contains ancient stars (>10 Gyr old). Based on this we conclude that merging globular clusters likely contributed to the build-up of the high stellar density in the nuclear stellar bulge of the Milky Way.es
dc.description.urihttp://iopscience.iop.org/article/10.3847/2041-8205/830/1/L14/meta;jsessionid=2531FBFFF06C9ECBA4852FB9D1F89851.c1.iopscience.cld.iop.org
dc.identifier.citationThe Astrophysical Journal Letters, Volume 830, Number 1es
dc.identifier.issn2041-8205
dc.identifier.other10.3847/2041-8205/830/1/L14
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/3055
dc.language.isoenes
dc.publisherIOP PUBLISHINGes
dc.subjectGLOBULAR-CLUSTER SYSTEMSes
dc.subjectLARGE-MAGELLANIC-CLOUDes
dc.subjectMASSIVE BLACK-HOLESes
dc.subjectSPIRAL GALAXIESes
dc.subjectVVV SURVEYes
dc.subjectEXTINCTIONes
dc.subjectSIMULATIONSes
dc.subjectCOEVOLUTIONes
dc.subjectEVOLUTIONes
dc.subjectVARIABLESes
dc.titleDISCOVERY OF RR LYRAE STARS IN THE NUCLEAR BULGE OF THE MILKY WAYes
dc.typeArtículoes
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