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Chromodynamical analysis of lenticular galaxies using globular clusters and planetary nebulae

Zanatta, Emilio J.B.; Cortesi, Arianna; Chies-Santos, Ana L.; Forbes, Duncan A.; Romanowsky, Aaron J.; Alabi, Adebusola B.; Coccato, Lodovico; Mendes de Oliveira, Claudia; Brodie, Jean P.; Merrifield, Michael

Authors

Emilio J.B. Zanatta

Arianna Cortesi

Ana L. Chies-Santos

Duncan A. Forbes

Aaron J. Romanowsky

Adebusola B. Alabi

Lodovico Coccato

Claudia Mendes de Oliveira

Jean P. Brodie



Abstract

Recovering the origins of lenticular galaxies can shed light on the understanding of galaxy formation and evolution, since they present properties that can be found in both elliptical and spiral galaxies. In this work we study the kinematics of the globular cluster (GC) systems of three lenticular galaxies located in low density environments (NGC2768, NGC3115 and NGC7457), and compare them with the kinematics of planetary nebulae (PNe). The PNe and GC data come from the Planetary Nebulae Spectrograph and the SLUGGS Surveys. Through photometric spheroid-disc decomposition and PNe kinematics we find the probability for a given GC to belong to either the spheroid or the disc of its host galaxy or be rejected from the model. We find that there is no correlation between the components that the GCs are likely to belong to and their colours. Particularly, for NGC2768 we find that its red GCs display rotation preferentially at inner radii (Re < 1). In the case of the GC system of NGC3115 we find a group of GCs with similar kinematics that are not likely to belong to neither its spheroid nor disc. For NGC7457 we find that 70% of its GCs are likely to belong to the disc. Overall, our results suggest that these galaxies assembled into S0s through different evolutionary paths. Mergers seem to have been very important for NGC2768 and NGC3115 while NGC7457 is more likely to have experienced secular evolution.

Citation

Zanatta, E. J., Cortesi, A., Chies-Santos, A. L., Forbes, D. A., Romanowsky, A. J., Alabi, A. B., …Merrifield, M. (in press). Chromodynamical analysis of lenticular galaxies using globular clusters and planetary nebulae. Monthly Notices of the Royal Astronomical Society, https://doi.org/10.1093/mnras/sty1737

Journal Article Type Article
Acceptance Date Jun 28, 2018
Online Publication Date Jul 4, 2018
Deposit Date Jul 11, 2018
Publicly Available Date Jul 11, 2018
Journal Monthly Notices of the Royal Astronomical Society
Print ISSN 0035-8711
Electronic ISSN 0035-8711
Publisher Oxford University Press
Peer Reviewed Peer Reviewed
DOI https://doi.org/10.1093/mnras/sty1737
Keywords Galaxies: evolution, galaxies: formation, galaxies: kinematics and dynamics, galaxies: elliptical and lenticular, cD, galaxies: star clusters: general, methods:
statistical
Public URL http://eprints.nottingham.ac.uk/id/eprint/52897
Publisher URL https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/sty1737/5049019
Copyright Statement Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf

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Copyright Statement
Copyright information regarding this work can be found at the following address: http://eprints.nottingham.ac.uk/end_user_agreement.pdf





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