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Multi-component parametric inversion of galaxy kinematics and stellar populations using full spectral fitting

Published online by Cambridge University Press:  17 August 2012

Ivan Yu. Katkov  and
Igor V. Chilingarian
Ivan Yu. Katkov
Affiliation:
Sternberg Astronomical Institute, Moscow State University, Universitetskii pr. 13, Moscow, 119992Russia email IK: katkov.ivan@gmail.com; IC: chil@sai.msu.ru
Igor V. Chilingarian
Affiliation:
Sternberg Astronomical Institute, Moscow State University, Universitetskii pr. 13, Moscow, 119992Russia email IK: katkov.ivan@gmail.com; IC: chil@sai.msu.ru
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Abstract

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The stellar line-of-sight velocity distribution (LOSVD) can be strongly asymmetric in regions where the light contributions of both disc and bulge in spiral and lenticular galaxies are comparable. Existing techniques for the stellar kinematics analysis do not take into account the difference of disc and bulge stellar populations. Here we present a novel approach to the analysis of stellar kinematics and stellar populations. We use a two-component model of spectra where different stellar population components are convolved with pure Gaussian LOSVDs. For this model we present Monte-Carlo simulations demonstrating degeneracies between the parameters.

Keywords

Methods: data analysisgalaxies: kinematics and dynamicsgalaxies: stellar content

References

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