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Using 3D Spectroscopy to Probe the Orbital Structure of Composite Bulges

Published online by Cambridge University Press:  09 February 2015

Peter Erwin ,
Roberto Saglia ,
Jens Thomas ,
Maximilian Fabricius ,
Ralf Bender ,
Stephanie Rusli ,
Nina Nowak ,
John E. Beckman  and
Juan Carlos Vega Beltrán
Peter Erwin
Affiliation:
Max-Planck-Insitut für extraterrestrische Physik, Giessenbachstr., 85748Garching, Germany Universitäts-Sternwarte München, Scheinerstrasse 1, 81679 München, Germany
Jens Thomas
Affiliation:
Max-Planck-Insitut für extraterrestrische Physik, Giessenbachstr., 85748Garching, Germany Universitäts-Sternwarte München, Scheinerstrasse 1, 81679 München, Germany
Maximilian Fabricius
Affiliation:
Max-Planck-Insitut für extraterrestrische Physik, Giessenbachstr., 85748Garching, Germany Universitäts-Sternwarte München, Scheinerstrasse 1, 81679 München, Germany
Ralf Bender
Affiliation:
Max-Planck-Insitut für extraterrestrische Physik, Giessenbachstr., 85748Garching, Germany Universitäts-Sternwarte München, Scheinerstrasse 1, 81679 München, Germany
Stephanie Rusli
Affiliation:
Max-Planck-Insitut für extraterrestrische Physik, Giessenbachstr., 85748Garching, Germany Universitäts-Sternwarte München, Scheinerstrasse 1, 81679 München, Germany
Nina Nowak
Affiliation:
Stockholm University, Department of Astronomy, Oskar Klein Centre, SE-10691 Stockholm, Sweden
John E. Beckman
Affiliation:
Instituto de Astrofísica de Canarias, C/ Via Láctea s/n, 38200 La Laguna, Tenerife, Spain
Juan Carlos Vega Beltrán
Affiliation:
Instituto de Astrofísica de Canarias, C/ Via Láctea s/n, 38200 La Laguna, Tenerife, Spain
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Abstract

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Detailed imaging and spectroscopic analysis of the centers of nearby S0 and spiral galaxies shows the existence of “composite bulges”, where both classical bulges and disky pseudobulges coexist in the same galaxy. As part of a search for supermassive black holes in nearby galaxy nuclei, we obtained VLT-SINFONI observations in adaptive-optics mode of several of these galaxies. Schwarzschild dynamical modeling enables us to disentangle the stellar orbital structure of the different central components, and to distinguish the differing contributions of kinematically hot (classical bulge) and kinematically cool (pseudobulge) components in the same galaxy.

Keywords

galaxies: elliptical and lenticularcD - galaxies: evolution - galaxies: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Issue S309: Galaxies in 3D across the Universe , July 2014 , pp. 359 - 360
Copyright
Copyright © International Astronomical Union 2015 

References

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