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The kinematics of the nebular shells around low mass progenitors of PNe with low metallicity

Published online by Cambridge University Press:  08 August 2017

Margarita Pereyra Open the ORCID record for Margarita Pereyra [Opens in a new window] ,
José Alberto López  and
Michael G. Richer Open the ORCID record for Michael G. Richer [Opens in a new window]
Margarita Pereyra
Affiliation:
Schlumberger Foundation Fellow, University of Southampton Southampton, SO17 1BJ, UK email: [email protected]
José Alberto López
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apartado Postal 106, C.P. 22800 Ensenada, BC, México email: [email protected], [email protected]
Michael G. Richer
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Apartado Postal 106, C.P. 22800 Ensenada, BC, México email: [email protected], [email protected]
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Abstract

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In the past few years we provided strong observational support for theoretical studies regarding the internal kinematics of Planetary Nebulae (PNe). A total of 257 objects segregated by different galactic populations were analized. Based upon spatially-resolved, long-slit, echelle spectroscopy drawn from the San Pedro Mártir Kinematic Catalogue of PNe †, we characterized the kinematics of PNe shells measuring their global expansion velocities. We present here a brief summary of these observational results, with a focus on our most recent study of about 26 PNe with low metallicity that appear to derive from progenitor stars of the lowest masses (including the halo PNe population). Low expansion velocities were found for these nebulae, less than 20 km s−1, which are most likely associated with a weak central star wind driving the kinematics of the nebular shell in this particular population.

Keywords

ISM: kinematics and dynamicsplanetary nebulae: generalstars: evolutionlow-massabundances
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. 188 - 192
Copyright
Copyright © International Astronomical Union 2017 

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