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Galaxy Zoo and ALFALFA: atomic gas and the regulation of star formation in barred disc galaxies

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dc.contributor.authorMasters, Karen L.
dc.contributor.authorNichol, Robert C.
dc.contributor.authorHaynes, Martha P.
dc.contributor.authorKeel, William C.
dc.contributor.authorLintott, Chris
dc.contributor.authorSimmons, Brooke
dc.contributor.authorSkibba, Ramin
dc.contributor.authorBamford, Steven
dc.contributor.authorGiovanelli, Riccardo
dc.contributor.authorSchawinski, Kevin
dc.contributor.otherUniversity of Portsmouth
dc.contributor.otherCornell University
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherUniversity of Oxford
dc.contributor.otherYale University
dc.contributor.otherUniversity of Arizona
dc.contributor.otherUniversity of Nottingham
dc.date.accessioned2018-09-21T19:45:02Z
dc.date.available2018-09-21T19:45:02Z
dc.date.issued2012
dc.description.abstractWe study the observed correlation between atomic gas content and the likelihood of hosting a large-scale bar in a sample of 2090 disc galaxies. Such a test has never been done before on this scale. We use data on morphologies from the Galaxy Zoo project and information on the galaxies H?I content from the Arecibo Legacy Fast Arecibo L-band Feed Array (ALFALFA) blind H?I survey. Our main result is that the bar fraction is significantly lower among gas-rich disc galaxies than gas-poor ones. This is not explained by known trends for more massive (stellar) and redder disc galaxies to host more bars and have lower gas fractions: we still see at fixed stellar mass a residual correlation between gas content and bar fraction. We discuss three possible causal explanations: (1) bars in disc galaxies cause atomic gas to be used up more quickly, (2) increasing the atomic gas content in a disc galaxy inhibits bar formation and (3) bar fraction and gas content are both driven by correlation with environmental effects (e.g. tidal triggering of bars, combined with strangulation removing gas). All three explanations are consistent with the observed correlations. In addition our observations suggest bars may reduce or halt star formation in the outer parts of discs by holding back the infall of external gas beyond bar co-rotation, reddening the global colours of barred disc galaxies. This suggests that secular evolution driven by the exchange of angular momentum between stars in the bar, and gas in the disc, acts as a feedback mechanism to regulate star formation in intermediate-mass disc galaxies.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationMasters, K. et al. (2012): Galaxy Zoo and ALFALFA: atomic gas and the regulation of star formation in barred disc galaxies. Monthly Notices of the Royal Astronomical Society, 424(3). DOI: https://doi.org/10.1111/j.1365-2966.2012.21377.x
dc.identifier.doi10.1111/j.1365-2966.2012.21377.x
dc.identifier.orcidhttps://orcid.org/0000-0001-7821-7195
dc.identifier.orcidhttps://orcid.org/0000-0003-0846-9578
dc.identifier.orcidhttps://orcid.org/0000-0001-5464-0888
dc.identifier.orcidhttps://orcid.org/0000-0001-5882-3323
dc.identifier.urihttp://ir.ua.edu/handle/123456789/3925
dc.languageEnglish
dc.language.isoen_US
dc.publisherOxford University Press
dc.rights.licenseAttribution 4.0 International (CC BY 4.0)
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectsurveys
dc.subjectgalaxies: evolution
dc.subjectgalaxies: ISM
dc.subjectgalaxies: spiral
dc.subjectgalaxies: statistics
dc.subjectgalaxies: structure
dc.subjectDIGITAL SKY SURVEY
dc.subjectIRAM LEGACY SURVEY
dc.subjectFAST ALPHA SURVEY
dc.subjectSECULAR EVOLUTION
dc.subjectSPIRAL GALAXIES
dc.subjectMOLECULAR GAS
dc.subjectMASSIVE GALAXIES
dc.subjectHI CONTENT
dc.subjectMORPHOLOGICAL CLASSIFICATIONS
dc.subjectOPTICAL-PROPERTIES
dc.subjectAstronomy & Astrophysics
dc.titleGalaxy Zoo and ALFALFA: atomic gas and the regulation of star formation in barred disc galaxiesen_US
dc.typetext
dc.typeReview

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