The stellar content of a prototype double barred galaxy |
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| Authors: | S Lourenso JAL Aguerri A Vazdekis JE Beckman RF Peletier |
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| Institution: | (1) Dpto. de Astrofísica, Univ. de La Laguna, Spain;(2) Instituto de Astrofísica de Canarias, E-38200 La Laguna (Tenerife), Spain;(3) Consejo Superior de Investigaciones Científicas, Spain;(4) School of Physics and Astronomy, Univ. of Nottingham, NG7 2RD, U.K.;(5) CRAL, Observatoire de Lyon, 9 Av. Charles André, 69230 St. Genis-Laval, France |
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| Abstract: | High spatial resolution visible and NIR observations of the bar of NGC 5850, a prototype of double barred spirals, together
with visible intermediate and high dispersion spectra along the primary bar, are being used, with the aid of simple stellar
population synthesis models, to investigate the mean age and metallicity of the different stellar components of the central
part of the galaxy. The determination of stellar ages and metallicities would constrain theoretical scenarios for secondary
bar formation and the evolution of barred spirals. Unfortunately, we cannot obtain a good fit with simple stellar populations
(SSPs) to the spectral indices, so it can not give us, by now, insight into the mean stellar age and metallicity of the real
populations in the central region of the galaxy. These preliminary results show a relatively old primary bar with metallicity
about solar, although absolute values must be taken with care. The nucleus has a young stellar component, and is very dusty.
This revised version was published online in August 2006 with corrections to the Cover Date. |
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| Keywords: | Barred Spirals Double Bars Stellar Populations Galaxies: NGC 5850 |
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