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The PN.S ETG survey

Published online by Cambridge University Press:  08 August 2017

M. Arnaboldi ,
C. Pulsoni ,
O. Gerhard  and
PN.S Consortium
M. Arnaboldi
Affiliation:
European Southern Observatory, K. Schwarzschild str. 2, 85748 Garching, Germany email: [email protected] INAF - Astrophysical Observatory of Turin, Strada Osservatorio 20, 10025, Pino Torinese, Italy
C. Pulsoni
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany email: [email protected]; [email protected]
O. Gerhard
Affiliation:
Max-Planck-Institut für Extraterrestrische Physik, Giessenbachstrasse, 85748 Garching, Germany email: [email protected]; [email protected]
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Abstract

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We have analyzed the velocity fields in the halos of thirty-three early-type galaxies (ETGs) with planetary nebulae (PNs) as tracers, reaching radii of up to ~8Re. The sample comprises twenty-five galaxies from the Planetary Nebulae Spectrograph (PN.S) ETG survey and eight further galaxies with extended PN velocity data from the literature and new Counter-Dispersed imaging observations. The catalogues from these thirty-three ETGs provide astrometric positions and heliocentric line-of-sight velocities for a total of 8354 extragalactic PNs. All these catalogues are treated homogeneously for the identification of kinematic outliers and the separation between main galaxy/satellites in each galaxy field-of-view. We discuss the rotation velocities, velocity dispersion profiles and radial trends of the specific angular momentum, separating between slow rotators and fast rotators. We compare the properties of the V/σ(R) and σ(R) profiles with predictions of 2D velocity fields from hydro-dynamical cosmological simulations. We briefly mention the possible origin of the quasi-Keplerian steeply decreasing profile galaxies which encompasses about one fourth of the current sample.

Keywords

ISM: planetary nebulae: general. Galaxies: elliptical and lenticularcDevolutionformationhaloskinematics and dynamics
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S323: Planetary Nebulae: Multi-Wavelength Probes of Stellar and Galactic Evolution , October 2016 , pp. 279 - 283
Copyright
Copyright © International Astronomical Union 2017 

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