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dc.contributor.authorAlonso-García, Javier
dc.contributor.authorMinniti, Dante
dc.contributor.authorCatelan, Márcio
dc.contributor.authorRamos, Rodrigo Contreras
dc.contributor.authorGonzalez, Oscar A.
dc.contributor.authorHempel, Maren
dc.contributor.authorLucas, Philip W.
dc.contributor.authorSaito, Roberto K.
dc.contributor.authorValenti, Elena
dc.contributor.authorZoccali, Manuela
dc.date.accessioned2018-09-27T09:09:38Z
dc.date.available2018-09-27T09:09:38Z
dc.date.issued2017-11-01
dc.identifier.citationAlonso-García , J , Minniti , D , Catelan , M , Ramos , R C , Gonzalez , O A , Hempel , M , Lucas , P W , Saito , R K , Valenti , E & Zoccali , M 2017 , ' Extinction ratios in the inner Galaxy as revealed by the VVV survey ' , Astrophysical Journal Letters , vol. 849 , no. 1 , L13 . https://doi.org/10.3847/2041-8213/aa92c3
dc.identifier.issn2041-8205
dc.identifier.otherPURE: 13277851
dc.identifier.otherPURE UUID: 15117a80-7713-4f3a-962f-b19b0d28af11
dc.identifier.otherArXiv: http://arxiv.org/abs/1710.04854v1
dc.identifier.otherScopus: 85032735374
dc.identifier.otherORCID: /0000-0002-8872-4462/work/62748887
dc.identifier.urihttp://hdl.handle.net/2299/20654
dc.descriptionAccepted for publication in ApJ Letters, 10 pages, 3 Figures, 2 Tables © 2017 The American Astronomical Society. All rights reserved.
dc.description.abstractInterstellar extinction towards the Galactic Center is large and significantly differential. Its reddening and dimming effects in red clump stars in the Galactic Bulge can be exploited to better constrain the extinction law towards the innermost Galaxy. By virtue of a deep and complete catalog of more than 30 million objets at $|l|\le2.7\deg$ and $|b|\le1.55\deg$ obtained from VVV survey observations, we apply the red clump method to infer the selective-to-total extinction ratios in the $Z$, $Y$, $J$, $H$ and $K_s$ broadband near-infrared filters. The measured values are smaller than previously reported, and are not constant, with mean values, e.g., $A_{K_S}/E(J-K_s)=0.428\pm0.005\pm0.04$ and $A_{K_S}/E(H-K_s)=1.104\pm0.022\pm0.2$. We also obtain a ratio $A_Z$:$A_Y$:$A_J$:$A_H$:$A_{K_S}$ of 7.74:5.38:3.30:1.88:1.0, implying extinction towards the Galactic Center to follow a distribution as a function of wavelength steeper than previously reported, consistent with a power law $A_{\lambda}\propto{\lambda}^{-2.47}$ in the near-infrared.en
dc.language.isoeng
dc.relation.ispartofAstrophysical Journal Letters
dc.rightsEmbargoed
dc.subjectastro-ph.GA
dc.subjectastro-ph.SR
dc.titleExtinction ratios in the inner Galaxy as revealed by the VVV surveyen
dc.contributor.institutionCentre for Astrophysics Research
dc.contributor.institutionSchool of Physics, Astronomy and Mathematics
dc.description.statusPeer reviewed
dc.identifier.urlhttps://arxiv.org/abs/1710.04854
dc.relation.schoolSchool of Physics, Astronomy and Mathematics
dc.description.versiontypeFinal Accepted Version
dcterms.dateAccepted2017-11-01
rioxxterms.versionAM
rioxxterms.versionofrecordhttps://doi.org/10.3847/2041-8213/aa92c3
rioxxterms.licenseref.uriOther
rioxxterms.typeJournal Article/Review
herts.preservation.rarelyaccessedtrue
herts.rights.accesstypeEmbargoed


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