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dc.contributor.authorAguerri, J.A.L.
dc.contributor.authorMendez Abreu, Jairo
dc.contributor.authorFalcón-Barroso, J.
dc.contributor.authorAmorin, A.
dc.contributor.authorBarrera-Ballesteros, J.
dc.contributor.authorCid Fernandes, R.
dc.contributor.authorGarcía-Benito, R.
dc.contributor.authorGarcía-Lorenzo, B.
dc.contributor.authorGonzález Delgado, R.M.
dc.contributor.authorHusemann, B.
dc.contributor.authorKalinova, V.
dc.contributor.authorLyubenova, M.
dc.contributor.authorMarino, R.A.
dc.contributor.authorMárquez, I.
dc.contributor.authorMast, D.
dc.contributor.authorPérez, E.
dc.contributor.authorSánchez, S.F.
dc.contributor.authorVan De Ven, G.
dc.contributor.authorWalcher, C.J.
dc.contributor.authorBacksmann, N.
dc.contributor.authorCortijo-Ferrero, C.
dc.contributor.authorBland-Hawthorn, J.
dc.contributor.authorDel Olmo, A.
dc.contributor.authorIglesias-Páramo, J.
dc.contributor.authorPérez, I.
dc.contributor.authorSánchez-Blázquez, P.
dc.contributor.authorWisotzki, L.
dc.contributor.authorZiegler, B.
dc.identifier.citationAguerri , J A L , Mendez Abreu , J , Falcón-Barroso , J , Amorin , A , Barrera-Ballesteros , J , Cid Fernandes , R , García-Benito , R , García-Lorenzo , B , González Delgado , R M , Husemann , B , Kalinova , V , Lyubenova , M , Marino , R A , Márquez , I , Mast , D , Pérez , E , Sánchez , S F , Van De Ven , G , Walcher , C J , Backsmann , N , Cortijo-Ferrero , C , Bland-Hawthorn , J , Del Olmo , A , Iglesias-Páramo , J , Pérez , I , Sánchez-Blázquez , P , Wisotzki , L & Ziegler , B 2015 , ' Bar pattern speeds in CALIFA galaxies : I. Fast bars across the Hubble sequence ' , Astronomy & Astrophysics , vol. 576 , A102 .
dc.identifier.otherPURE: 190327178
dc.identifier.otherPURE UUID: 1c2fe8df-742f-43f8-8842-143a8240caf1
dc.identifier.otherScopus: 84928041705
dc.identifier.otherWOS: 000357274600037
dc.descriptionJ.M.A. acknowledges support from the European Research Council Starting Grant (SEDmorph; P.I. V. Wild). Date of Acceptance: 07/01/2015en
dc.description.abstractContext. The bar pattern speed (Ωb) is defined as the rotational frequency of the bar, and it determines the bar dynamics. Several methods have been proposed for measuring Ωb. The non-parametric method proposed by Tremaine & Weinberg (1984, ApJ, 282, L5; TW) and based on stellar kinematics is the most accurate. This method has been applied so far to 17 galaxies, most of them SB0 and SBa types. Aims. We have applied the TW method to a new sample of 15 strong and bright barred galaxies, spanning a wide range of morphological types from SB0 to SBbc. Combining our analysis with previous studies, we investigate 32 barred galaxies with their pattern speed measured by the TW method. The resulting total sample of barred galaxies allows us to study the dependence of Ωb on galaxy properties, such as the Hubble type. Methods. We measured Ωb using the TW method on the stellar velocity maps provided by the integral-field spectroscopy data from the CALIFA survey. Integral-field data solve the problems that long-slit data present when applying the TW method, resulting in the determination of more accurate Ωb. In addition, we have also derived the ratio ℜ of the corotation radius to the bar length of the galaxies. According to this parameter, bars can be classified as fast (ℜ <1.4) and slow (ℜ > 1.4). Results. For all the galaxies, ℜ is compatible within the errors with fast bars. We cannot rule out (at 95% level) the fast bar solution for any galaxy. We have not observed any significant trend between ℜ and the galaxy morphological type. Conclusions. Our results indicate that independent of the Hubble type, bars have been formed and then evolve as fast rotators. This observational result will constrain the scenarios of formation and evolution of bars proposed by numerical simulations.
dc.relation.ispartofAstronomy & Astrophysicsen
dc.rightsCopyright ESO 2015. Reproduced with permission from Astronomy & Astrophysics, © ESO. The final published version of this work is also available from the publisher:
dc.subjectGalaxies: kinematics and dynamicsen
dc.subjectGalaxies: structureen
dc.subjectGalaxies: photometryen
dc.subjectGalaxies: evolutionen
dc.subjectGalaxies: formationen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleBar pattern speeds in CALIFA galaxies : I. Fast bars across the Hubble sequenceen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.description.statusPeer revieweden

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