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2001MNRAS.324.1087R - Mon. Not. R. Astron. Soc., 324, 1087-1101 (2001/July-2)
Stellar population gradients in normal and active galaxies.
RAIMANN D., STORCHI-BERGMANN T., BICA E. and ALLOIN D.
Abstract (from CDS):
Sampling regions of ~100-200pc, we conclude that the normal galaxies have nuclear stellar populations dominated by the components with an age of 10Gyr and metallicity solar or above. The contribution of this component decreases, while that of 1Gyr increases, with increasing distance from the nucleus. The LINERs present a similar behaviour but have a ~10-20 per cent larger contribution of the 1-Gyr component at the nucleus. For the Seyfert 2 galaxies, there are additional components: in the three cases studied here, there is a significant contribution from a 100-Myr-old population at the nucleus plus featureless continuum in two cases and also of a 3-Myr-old component in Mrk463E. Outside the nucleus, the stellar population is similar to that of normal galaxies in ESO138-G1, but it has an excess of old metal-poor components in NGC7743 and of young components in Mrk463E, when compared with normal galaxies. The reddening of the continuum is lowest in the normal galaxy nuclei [E(B-V)i~0.00] and highest in the Seyfert [E(B-V)i~0.20] nuclei. (ref???[q1Q1])
Abstract Copyright: The Royal Astronomical Society
Journal keyword(s): galaxies: active - galaxies: general - galaxies: Seyfert - galaxies: stellar content
Simbad objects: 11
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