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Modeling dark haloes in early-type galaxies: stellar kinematics at large radii

Published online by Cambridge University Press:  21 October 2010

Anne-Marie Weijmans
Anne-Marie Weijmans*
Affiliation:
Sterrewacht Leiden, Leiden University, Postbus 9513, 2300 RA Leiden, the Netherlands email:weijmans@strw.leidenuniv.nl European Southern Observatory, Karl-Schwarzschild-Str 2, 85748 Garching, Germany
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We developed a new method to obtain absorption line spectra of early-type galaxies at large radii, using integral-field spectrography (IFS). By using the spectrograph as a 'photon-collector' and adding the signal of many individual spaxels together in one spectrum, we obtain sufficient signal-to-noise to measure both stellar kinematics and line strengths at large radii. These can be used to determine the properties of the dark matter halo, as well as the stellar halo population.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Highlights H15: Highlights of Astronomy , November 2009 , pp. 69
Copyright
Copyright © International Astronomical Union 2010

References

van den Bosch, R. C. E., van de Ven, G., Verolme, E. K., Cappellari, M., & de Zeeuw, P. T., 2008, MNRAS, 385, 647Google Scholar
Weijmans, A., 2009, PhD thesis, Leiden UniversityGoogle Scholar
Weijmans, A., et al. , 2009, MNRAS, in press (arXiv0908.0018)Google Scholar