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dc.contributor.authorHolmes, L.
dc.contributor.authorSpekkens, K.
dc.contributor.authorSánchez, S.F.
dc.contributor.authorWalcher, C.J.
dc.contributor.authorGarcía-Benito, R.
dc.contributor.authorMast, D.
dc.contributor.authorCortijo-Ferrero, C.
dc.contributor.authorKalinova, V.
dc.contributor.authorMarino, R.A.
dc.contributor.authorMendez Abreu, Jairo
dc.contributor.authorBarrera-Ballesteros, J.K.
dc.identifier.citationHolmes , L , Spekkens , K , Sánchez , S F , Walcher , C J , García-Benito , R , Mast , D , Cortijo-Ferrero , C , Kalinova , V , Marino , R A , Mendez Abreu , J & Barrera-Ballesteros , J K 2015 , ' The incidence of bar-like kinematic flows in CALIFA galaxies ' , Monthly Notices of the Royal Astronomical Society , vol. 451 , no. 4 , pp. 4397-4411 .
dc.identifier.otherPURE: 221907326
dc.identifier.otherPURE UUID: 7ecea7fc-71e2-4f66-b0c1-9b5f9d8fb07a
dc.identifier.otherScopus: 84940118273
dc.identifier.otherWOS: 000360846400081
dc.descriptionKS acknowledges support from the Natural Sciences and Engineering Research Council of Canada. CJW acknowledges support through the Marie Curie Career Integration Grant 303912. RAM is funded by the Spanish program of International Campus of Excellence Moncloa (CEI). JMA acknowledges support from the European Research Council Starting Grant (SEDmorph; P.I. V. Wild).en
dc.description.abstractWe carry out a direct search for bar-like non-circular flows in intermediate-inclination, gasrich disc galaxies with a range of morphological types and photometric bar classifications from the first data release (DR1) of the Calar Alto Legacy Integral Field Spectroscopy Area (CALIFA) survey. We use the DISKFIT algorithm to apply rotation only and bisymmetric flow models to H α velocity fields for 49/100 CALIFA DR1 systems that meet our selection criteria. We find satisfactory fits for a final sample of 37 systems. DISKFIT is sensitive to the radial or tangential components of a bar-like flow with amplitudes greater than 15 km s-1 across at least two independent radial bins in the fit, or ~2.25 kpc at the characteristic final sample distance of ~75 Mpc. The velocity fields of 25/37 (67.6+6.6-8.5 per cent) galaxies are best characterized by pure rotation, although only 17/25 (68.0+7.7-10.4 per cent) of them have sufficient H α emission near the galaxy centre to afford a search for non-circular flows. We detect non-circular flows in the remaining 12/37 (32.4+8.5-6.6 per cent) galaxies. We conclude that the non-circular flows detected in 11/12 (91.7+2.8-14.9 per cent) systems stem from bars. Galaxies with intermediate (AB) bars are largely undetected, and our detection thresholds therefore represent upper limits to the amplitude of the non-circular flows therein. We find 2/23 (8.7+9.6-2.9 per cent) galaxies that show non-circular motions consistent with a bar-like flow, yet no photometric bar is evident. This suggests that in ~10 per cent of galaxies either the existence of a bar may be missed completely in photometry or other processes may drive bar-like flows and thus secular galaxy evolution.
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rightsThis article has been accepted for publication in Monthly Notices of the Royal Astronomical Society, © 2015 The Authors, Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved.en
dc.subjectGalaxies: kinematics and dynamicsen
dc.subjectGalaxies: spiralen
dc.subjectGalaxies: structureen
dc.subjectQC Physicsen
dc.subjectQB Astronomyen
dc.titleThe incidence of bar-like kinematic flows in CALIFA galaxiesen
dc.typeJournal articleen
dc.contributor.sponsorEuropean Research Councilen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.description.statusPeer revieweden

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