The kinematics of evolved planetary nebulae
Por:
Pereyra E.M., Richer M.G., López J.-A.
Publicada:
1 ene 2011
Categoría:
Astronomy and Astrophysics
Resumen:
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]??6548, 6584 emission line. These results shall serve to be compared to predictions of hydrodynamical models. © 2012 International Astronomical Union.
Filiaciones:
Pereyra E.M.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Campus Ensenada, C.P. 22800, Ensenada B.C., Mexico
Richer M.G.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Campus Ensenada, C.P. 22800, Ensenada B.C., Mexico
López J.-A.:
Instituto de Astronomía, Universidad Nacional Autónoma de México, Campus Ensenada, C.P. 22800, Ensenada B.C., Mexico
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