DO BARS DRIVE SPIRAL DENSITY WAVES?

dc.contributor.authorButa, Ronald J.
dc.contributor.authorKnapen, Johan H.
dc.contributor.authorElmegreen, Bruce G.
dc.contributor.authorSalo, Heikki
dc.contributor.authorLaurikainen, Eija
dc.contributor.authorElmegreen, Debra Meloy
dc.contributor.authorPuerari, Ivanio
dc.contributor.authorBlock, David L.
dc.contributor.otherUniversity of Alabama Tuscaloosa
dc.contributor.otherInstituto de Astrofisica de Canarias
dc.contributor.otherInternational Business Machines (IBM)
dc.contributor.otherUniversity of Oulu
dc.contributor.otherVassar College
dc.contributor.otherInstituto Nacional de Astrofisica, Optica y Electronica
dc.contributor.otherUniversity of Witwatersrand
dc.date.accessioned2019-06-12T15:18:28Z
dc.date.available2019-06-12T15:18:28Z
dc.date.copyright2009
dc.date.issued2009-05
dc.description.abstractWe present deep near-infrared Ks-band Anglo-Australian Telescope Infrared Imager and Spectrograph observations of a selected sample of nearby barred spiral galaxies, including some with the strongest known bars. The sample covers a range of Hubble types from SB0(-) to SBc. The goal is to determine if the torque strengths of the spirals correlate with those of the bars, which might be expected if the bars actually drive the spirals as has been predicted by theoretical studies. This issue has implications for interpreting bar and spiral fractions at high redshift. Analysis of previous samples suggested that such a correlation exists in the near-infrared, where effects of extinction and star formation are less important. However, the earlier samples had only a few excessively strong bars. Our new sample largely confirms our previous studies, but still any correlation is relatively weak. We find two galaxies, NGC 7513 and UGC 10862, where there is only a weak spiral in the presence of a very strong bar. We suggest that some spirals probably are driven by their bars at the same pattern speed, but that this may be only when the bar is growing or if there is abundant gas and dissipation.en_US
dc.format.mimetypeapplication/pdf
dc.identifier.citationButa, R., et al. (2009): Do Bars Drive Spiral Density Waves? The Astronomical Journal, 137(5). DOI: 10.1088/0004-6256/137/5/4487
dc.identifier.doi10.1088/0004-6256/137/5/4487
dc.identifier.orcidhttps://orcid.org/0000-0003-1643-0024
dc.identifier.urihttp://ir.ua.edu/handle/123456789/5731
dc.languageEnglish
dc.language.isoen_US
dc.publisherIOP Publishing
dc.rights.holderAmerican Astronomical Society
dc.subjectgalaxies: kinematics and dynamics
dc.subjectgalaxies: photometry
dc.subjectgalaxies: spiral
dc.subjectgalaxies: structure
dc.subjectGRAVITATIONAL TORQUES
dc.subjectBAND OBSERVATIONS
dc.subjectBARRED GALAXIES
dc.subjectSTAR-FORMATION
dc.subjectMORPHOLOGY
dc.subjectEVOLUTION
dc.subjectPHOTOMETRY
dc.subjectSTRENGTHS
dc.subjectKINEMATICS
dc.subjectRESONANCE
dc.subjectAstronomy & Astrophysics
dc.titleDO BARS DRIVE SPIRAL DENSITY WAVES?en_US
dc.typetext
dc.typeArticle
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