Made-to-measure galaxy modelling utilising absorption line strength data
Long R J
Source PublicationResearch in Astronomy and Astrophysics
AbstractWe enhance the Syer & Tremaine made-to-measure (M2M) particle method of stellar dynamical modelling to model simultaneously both kinematic data and absorption line strength data, thus creating a 'chemo-M2M' modelling scheme. We apply the enhanced method to four galaxies (NGC 1248, NGC 3838, NGC 4452, NGC 4551) observed using the SAURON integral-field spectrograph as part of the ATLAS(3D) programme. We are able to reproduce successfully the 2D line strength data achieving mean X-2 per bin values of 1 with > 95% of particles having converged weights. Because M2M uses a 3D particle system, we are also able to examine the underlying 3D line strength distributions. The extent to which these distributions are plausible representations of real galaxies requires further consideration. Overall, we consider the modelling exercise to be a promising first step in developing a 'chemo-M2M' modelling system and in understanding some of the issues to be addressed. While the made-to-measure techniques developed have been applied to absorption line strength data, they are in fact general and may be of value in modelling other aspects of galaxies.
Funding Project[Strategic Priority Research Program "The Emergence of Cosmological Structures" of the Chinese Academy of Sciences] ; [National Natural Science Foundation of China (NSFC)]
Document Type期刊论文
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Long R J. Made-to-measure galaxy modelling utilising absorption line strength data[J]. Research in Astronomy and Astrophysics,2016,16(12).
APA Long R J.(2016).Made-to-measure galaxy modelling utilising absorption line strength data.Research in Astronomy and Astrophysics,16(12).
MLA Long R J."Made-to-measure galaxy modelling utilising absorption line strength data".Research in Astronomy and Astrophysics 16.12(2016).
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