Characterizing global expansion evolution of the ionized matter in planetary nebulae
Por:
Lopez, J. A., Richer, M. G., Pereyra, M., Garcia-Diaz, M. T.
Publicada:
1 ene 2017
Categoría:
Astronomy and astrophysics
Resumen:
Bulk outflow or global expansion velocities are presented for a large
number of planetary nebulae (PNe) that span a wide range of evolutionary
stages and different stellar populations. The sample comprises 133 PNe
from the Galactic bulge, 100 mature and highly evolved PNe from the
disk, 11 PNe from the Galactic halo and 15 PNe with very low central
star masses and low metallicities, for a total of 259 PNe. These results
reveal from a statistical perspective the kinematic evolution of the
expansion velocities of PNe in relation to changing characteristics of
the central star's wind and ionizing luminosity and as a function of the
evolutionary rate determined by the central (CS) mass. The large number
of PNe utilized in this work for each group of PNe under study and the
homogeneity of the data provide for the first time a solid benchmark
form observations for model predictions, as has been described by Lopez
et al. (2016).
Filiaciones:
Lopez, J. A.:
Univ Nacl Autonoma Mexico, Inst Astron, Campus Ensenada, Ensenada 22860, Baja California, Mexico
Richer, M. G.:
Univ Nacl Autonoma Mexico, Inst Astron, Campus Ensenada, Ensenada 22860, Baja California, Mexico
Pereyra, M.:
Univ Southampton, Southampton SO17 1BJ, Hants, England
Garcia-Diaz, M. T.:
Univ Nacl Autonoma Mexico, Inst Astron, Campus Ensenada, Ensenada 22860, Baja California, Mexico
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