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The ubiquity of turbulence in the expanding kinematics of the ionized shells of Galactic planetary nebulae
Francisco Ruiz-Escobedo, Michael G. Richer, José Alberto López
We present an analysis of the residual velocities from a sample of 105 Galactic planetary nebulae (PNe), the largest done to date on this subject. The analysis has been carried out…
Kinematics and physical structure of Ou 5: A bipolar planetary nebula with extreme abundance discrepancy and an eclipsing binary core
William J. Henney, J. A. López, Ma. T. García-Díaz +5
We present new deep imaging and high-resolution spectroscopy of the extreme-abundance-discrepancy planetary nebula Ou 5, together with photoionization modelling aimed at probing it…
Kinematical analysis of PNe with high ADF: Hf 2-2 and M 1-42
Lesly Castañeda-Carlos, Michael G. Richer, Silvia Torres-Peimbert +2
We use deep Echelle spectroscopy of the planetary nebulae Hf 2-2 and M1-42 to study the characteristics of the plasma that gives rise to their high abundance discrepancy factors (7…
NGC 6153: Reality is complicated
Michael G. Richer, Anabel Arrieta, Lorena Arias +4
We study the kinematics of emission lines that arise from many physical processes in NGC 6153 based upon deep, spatially-resolved, high resolution spectra acquired with the UVES sp…
The five axes of the Turtle: symmetry and asymmetry in NGC 6210
William J. Henney, J. A. López, Ma. T. García-Díaz +1
We carry out a comprehensive kinematic and morphological study of the asymmetrical planetary nebula: NGC 6210, known as the Turtle. The nebula's spectacularly chaotic appearance ha…
The Kinematics of the Permitted C II 6578 Line in a Large Sample of Planetary Nebulae
Michael G. Richer, Genaro Suárez, José Alberto López +1
We present spectroscopic observations of the C II 6578 permitted line for 83 lines of sight in 76 planetary nebulae at high spectral resolution, most of them obtained with the M…