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dc.contributor.authorMatsuura, M.
dc.contributor.authorBernard-Salas, J.
dc.contributor.authorLloyd Evans, Thomas Harry Hope
dc.contributor.authorVolk, K.M.
dc.contributor.authorHrivnak, B.J.
dc.contributor.authorSloan, G.C.
dc.contributor.authorChu, Y.-H.
dc.contributor.authorGruendl, R.
dc.contributor.authorKraemer, K.E.
dc.contributor.authorPeeters, E.
dc.contributor.authorSzczerba, R.
dc.contributor.authorWood, P.R.
dc.contributor.authorZijlstra, A.A.
dc.contributor.authorHony, S.
dc.contributor.authorIta, Y.
dc.contributor.authorKamath, D.
dc.contributor.authorLagadec, E.
dc.contributor.authorParker, Q.A.
dc.contributor.authorReid, W.A.
dc.contributor.authorShimonishi, T.
dc.contributor.authorWinckel, H.V.
dc.contributor.authorWoods, P.M.
dc.contributor.authorKemper, F.
dc.contributor.authorMeixner, M.
dc.contributor.authorOtsuka, M.
dc.contributor.authorSahai, R.
dc.contributor.authorSargent, B.A.
dc.contributor.authorHora, J.L.
dc.contributor.authorMcDonald, I.
dc.date.accessioned2014-09-09T11:01:03Z
dc.date.available2014-09-09T11:01:03Z
dc.date.issued2014-04-01
dc.identifier.citationMatsuura , M , Bernard-Salas , J , Lloyd Evans , T H H , Volk , K M , Hrivnak , B J , Sloan , G C , Chu , Y-H , Gruendl , R , Kraemer , K E , Peeters , E , Szczerba , R , Wood , P R , Zijlstra , A A , Hony , S , Ita , Y , Kamath , D , Lagadec , E , Parker , Q A , Reid , W A , Shimonishi , T , Winckel , H V , Woods , P M , Kemper , F , Meixner , M , Otsuka , M , Sahai , R , Sargent , B A , Hora , J L & McDonald , I 2014 , ' Spitzer Space Telescope spectra of post-AGB stars in the large magellanic Cloud - polycyclic aromatic hydrocarbons at low metallicities ' , Monthly Notices of the Royal Astronomical Society , vol. 439 , no. 2 , pp. 1472-1493 . https://doi.org/10.1093/mnras/stt2495en
dc.identifier.issn0035-8711
dc.identifier.otherPURE: 146979831
dc.identifier.otherPURE UUID: 65522dca-7b6c-4b12-a090-e690e7f40124
dc.identifier.otherScopus: 84897087849
dc.identifier.otherWOS: 000334114000016
dc.identifier.urihttps://hdl.handle.net/10023/5388
dc.descriptionRSz acknowledges support from Marie Curie Actions IRSES (project No. 269193) of EU and from Polish NCN grant 2011/01/B/ST9/02031. FK acknowledges financial support from the National Science Council under grant number NSC100-2112-M-001-023-MY3.en
dc.description.abstractThis paper reports variations of polycyclic aromatic hydrocarbons (PAHs) features that were found in Spitzer Space Telescope spectra of carbon-rich post-asymptotic giant branch (post-AGB) stars in the Large Magellanic Cloud (LMC). The paper consists of two parts. The first part describes our Spitzer spectral observing programme of 24 stars including post-AGB candidates. The latter half of this paper presents the analysis of PAH features in 20 carbon-rich post-AGB stars in the LMC, assembled from the Spitzer archive as well as from our own programme.We found that five post-AGB stars showed a broad feature with a peak at 7.7 μm, that had not been classified before. Further, the 10-13 μm PAH spectra were classified into four classes, one of which has three broad peaks at 11.3, 12.3 and 13.3 μm rather than two distinct sharp peaks at 11.3 and 12.7 μm, as commonly found in HII regions. Our studies suggest that PAHs are gradually processed while the central stars evolve from post-AGB phase to planetary nebulae, changing their composition before PAHs are incorporated into the interstellar medium. Although some metallicity dependence of PAH spectra exists, the evolutionary state of an object is more significant than its metallicity in determining the spectral characteristics of PAHs for LMC and Galactic post-AGB stars.
dc.format.extent22
dc.language.isoeng
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rights© 2014 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Societyen
dc.subjectStars: AGB and post-AGBen
dc.subjectCircumstellar matteren
dc.subjectGalaxies: individual: Large Magellanic Clouden
dc.subjectInfrared: starsen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subject.lccQBen
dc.subject.lccQCen
dc.titleSpitzer Space Telescope spectra of post-AGB stars in the large magellanic Cloud - polycyclic aromatic hydrocarbons at low metallicitiesen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.identifier.doihttps://doi.org/10.1093/mnras/stt2495
dc.description.statusPeer revieweden


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