Testing the nature of S0 galaxies using planetary nebula kinematics in NGC 1023
Noordermeer, E; Merrifield, M R; Coccato, L; Arnaboldi, Magda; Capaccioli, M; Douglas, Nigel G; Freeman, Kenneth; Gerhard, Ortwin; Kuijken, Konrad; De Lorenzi, F; Napolitano, Nicola R; Napolitano, N. R.
We investigate the manner in which lenticular galaxies are formed by studying their stellar kinematics: an S0 formed from a fading spiral galaxy should display similar cold outer disc kinematics to its progenitor, while an S0 formed in a minor merger should be more dominated by random motions. In a pilot study, an attempt to distinguish between these scenarios, we have measured the planetary nebula (PN) kinematics of the nearby S0 system NGC 1023. Using the Planetary Nebula Spectrograph, we...[Show more]
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|Source:||Monthly Notices of the Royal Astronomical Society|
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