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dc.contributor.authorWozniak, Hervé
dc.date.accessioned2019-10-24T19:16:55Z
dc.date.available2019-10-24T19:16:55Z
dc.date.created2017-02-28 01:23
dc.date.issued2007-01-24
dc.identifieroai:arXiv.org:astro-ph/0701687
dc.identifierhttp://arxiv.org/abs/astro-ph/0701687
dc.identifierdoi:10.1051/0004-6361:20067020
dc.identifier.doi10.1051/0004-6361:20067020
dc.identifier.urihttp://hdl.handle.net/20.500.12424/1029962
dc.description.abstractRecent analysis of stellar populations in barred galaxies have focused on the spatial distribution of stellar population ages and metallicities. However, barred galaxies are complex objects where dynamical instabilities play a leading role in shaping any spatial distribution. The age distribution of stellar populations should thus be analyzed from the two points of view of stellar population evolution and dynamical secular evolution. Chemodynamical simulations of single barred galaxies with simple but realistic star formation and feedback recipes are used to produce face-on mass-weighted maps of stellar population ages. Luminosity-weighted maps in V-band are also displayed after calibrating the simulation with mass-to-light ratios provided by a synthesis population model. It is shown that inside a stellar bar two persistent diametrically opposed regions display a mean age lower than the surrounding average. These two low-age regions are due to the accumulation of young stellar populations trapped on elliptical-like orbits along the bar, near the ultra-harmonic resonance. Age gradients along the bar major-axis are comparable to recent observations. Another low-age region is the outer ring located near the Outer Lindblad Resonance, but the presence and strength of this structure is very time-dependent.
dc.description.abstractComment: Accepted for publication in A&A Letters, 4 pages, 4 figures. Fig.3 is available at full resolution at: http://cral.univ-lyon1.fr/herve.wozniak/Articles/age_bar_6.eps.gz
dc.subjectAstrophysics
dc.titleThe distribution of stellar population age in galactic bars
dc.typetext
ge.collectioncodeOAIDATA
ge.dataimportlabelOAI metadata object
ge.identifier.legacyglobethics:10668785
ge.identifier.permalinkhttps://www.globethics.net/gtl/10668785
ge.lastmodificationdate2017-02-28 01:23
ge.lastmodificationuseradmin@pointsoftware.ch (import)
ge.submissions0
ge.oai.exportid149001
ge.oai.repositoryid58
ge.oai.setnameAstrophysics
ge.oai.setspecphysics:astro-ph
ge.oai.streamid5
ge.setnameGlobeTheoLib
ge.setspecglobetheolib
ge.linkhttp://arxiv.org/abs/astro-ph/0701687


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