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Galaxies 2017, 5(2), 26; doi:10.3390/galaxies5020026

The SLUGGS Survey: Understanding Lenticular Galaxy Formation via Extended Stellar Kinematics

Centre for Astrophysics and Supercomputing, Swinburne University of Technology, Hawthorn 3122, Melbourne, Australia
Received: 4 May 2017 / Revised: 22 May 2017 / Accepted: 26 May 2017 / Published: 30 May 2017
(This article belongs to the Special Issue On the Origin (and Evolution) of Baryonic Galaxy Halos)
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Abstract

We present the latest published and preliminary results from the SLUGGS Survey discussing the formation of lenticular galaxies through analysis of their kinematics. These include a comparison of the measured stellar spin of low-mass lenticular galaxies to the spin of remnant galaxies formed by binary merger simulations to assess whether a merger is a likely formation mechanism for these galaxies. We determine that while a portion of lenticular galaxies have properties consistent with these remnants, others are not, indicating that they are likely “faded spirals”. We also present a modified version of the spin–ellipticity diagram, which utilises radial tracks to be able to identify galaxies with intermediate-scale discs. Such galaxies often have conflicting morphological classifications, depending on whether photometric or kinematic measurements are used. Finally, we present preliminary results on the total mass density profile slopes of lenticular galaxies to assess trends as lower stellar masses are probed. View Full-Text
Keywords: galaxies: formation; galaxies: evolution; galaxies: elliptical and lenticular galaxies: formation; galaxies: evolution; galaxies: elliptical and lenticular
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Bellstedt, S. The SLUGGS Survey: Understanding Lenticular Galaxy Formation via Extended Stellar Kinematics. Galaxies 2017, 5, 26.

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