Stellar Line-strength Index Gradients along Bars

Details Stellar Line-strength Index Gradients along Bars Stellar Line-strength Index Gradients along Bars

Jun 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..390..314p&link_type=abstract

Pathways Through an Eclectic Universe ASP Conference Series, Vol. 390, proceedings of the conference held 23-27 April, 2007 at S

Mathematics

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We present a detailed study of stellar line indices along the bar region for a sample of six early-type galaxies. We find positive gradients within the bar region in the metal indices in four of the six galaxies, and opposite trends in the other two. These latter two galaxies are classified as SAB and they present exponential bar light profiles. For all the galaxies we find a positive gradient in the Balmer indices. There is a clear correlation between the position of morphological features inside the bar region with changes in the slope and value of the indices that indicate, using stellar population analysis, changes in the stellar population, changing radially to younger and more metal rich populations for all the galaxies except for those two with exponential profiles.

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