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The kinematics of evolved planetary nebulae

Published online by Cambridge University Press:  30 August 2012

E. Margarita Pereyra ,
Michael G. Richer  and
Jose-Alberto López
E. Margarita Pereyra
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México Campus Ensenada, C.P. 22800, Ensenada B.C., México email: [email protected], [email protected], [email protected]
Michael G. Richer
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México Campus Ensenada, C.P. 22800, Ensenada B.C., México email: [email protected], [email protected], [email protected]
Jose-Alberto López
Affiliation:
Instituto de Astronomía, Universidad Nacional Autónoma de México Campus Ensenada, C.P. 22800, Ensenada B.C., México email: [email protected], [email protected], [email protected]
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Abstract

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We have selected a group of 85 evolved planetary nebulae to study their kinematic characteristic based on spatially resolved, long-slit echelle spectroscopy. The data have been drawn from the San Pedro Mártir Kinematic Catalogue of PNe. The aim is to characterize in detail the global kinematics of PNe at advanced stages of evolution with the largest sample of homogenous data used to date for this purpose. The results reveal groups that share kinematic and photo-ionization characteristics of the nebular shell at the different late stages under study. The expansion velocities are typically larger than seen in earlier evolutionary stages, with the largest velocities occurring in objects with very weak or absent [N II]λλ6548, 6584 emission line. These results shall serve to be compared to predictions of hydrodynamical models.

Keywords

planetary nebulae: generalISM: kinematics and dynamicstechniques: spectroscopic
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 7 , Symposium S283: Planetary Nebulae: An Eye to the Future , July 2011 , pp. 472 - 473
Copyright
Copyright © International Astronomical Union 2012

References

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López, J. A., Richer, M. G., García-Díaz, Ma. T., Clark, D. M., Meaburn, J., Riesgo, H., Steffen, W., & Lloyd, M. 2012, RMxAA, 48, 3 Google Scholar