Constraining dust extinction properties via the VVV survey

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dc.contributor.authorMajaess, D
dc.contributor.authorTurner, D
dc.contributor.authorDekany, I
dc.contributor.authorMinniti, D
dc.contributor.authorGieren, W
dc.date.accessioned2017-03-10T13:24:44Z
dc.date.available2017-03-10T13:24:44Z
dc.date.issued2016-09
dc.descriptionIndexación: Web of Sciencees
dc.description.abstractNear-infrared color-excess and extinction ratios are essential for establishing the cosmic distance scale and probing the Galaxy, particularly when analyzing targets attenuated by significant dust. A robust determination of those ratios followed from leveraging new infrared observations from the VVV survey, wherein numerous bulge RR Lyrae and Type II Cepheids were discovered, in addition to BVJHKs(3.4 -> 22) mu m data for classical Cepheids and O stars occupying the broader Galaxy. The apparent optical color-excess ratios vary significantly with Galactic longitude (l), whereas the near-infrared results are comparatively constant with l and Galactocentric distance (E(J-(3.5 mu m) over bar /E(J - K-s) = 1.28 +/- 0.03. The results derived imply that classical Cepheids and O stars display separate optical trends (R-V,R-BV) with l, which appear to disfavor theories advocating a strict and marked decrease in dust size with increasing Galactocentric distance. The classical Cepheid, Type II Cepheid, and RR Lyrae variables are characterized by (A(J)/E(J-K-s) = (R-J,R-JKs) = 1.49 +/- 0.05 ((A(Ks)/A(J)) = 0.33 +/- 0.02), whereas the O stars are expectedly impacted by emission beyond 3.6 mu m. The mean optical ratios characterizing classical Cepheids and O stars are approximately (R-V,R-BV) similar to 3.1 and (R-V,R-BV) similar to 3.3, respectively.es
dc.description.urihttp://www.aanda.org/articles/aa/abs/2016/09/aa28763-16/aa28763-16.html
dc.identifier.citationA&A 593, A124 (2016)es
dc.identifier.issn1432-0746
dc.identifier.otherhttps://doi.org/10.1051/0004-6361/201628763
dc.identifier.urihttp://repositorio.unab.cl/xmlui/handle/ria/3058
dc.language.isoenes
dc.publisherEDP SCIENCESes
dc.subjectLARGE-MAGELLANIC-CLOUDes
dc.subjectGRAVITATIONAL LENSING EXPERIMENTes
dc.subjectOGLE-III CATALOGes
dc.subjectRR LYRAE STARSes
dc.subjectMILKY-WAYes
dc.subjectCLASSICAL CEPHEIDSes
dc.subjectGALACTIC CEPHEIDSes
dc.subjectLEAVITT LAWes
dc.subjectDISTANCEes
dc.subjectCURVEes
dc.titleConstraining dust extinction properties via the VVV surveyes
dc.typeArtículoes
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