2 papers
astro-ph.GA2019
The case of NGC 6302: The impact of shocks in the derivation of Nitrogen abundances
P. J. A. Lago, R. D. D. Costa, M. Faúndez-Abans +1
High nitrogen abundance is characteristic of Type I planetary nebulae as well as their highly filamentary structure. In the present work we test the hypothesis of shocks as a relev…
astro-ph.SR2016
NGC 2440 : A morpho-kinematical model
Paulo J. A. Lago, Roberto D. D. Costa
This work describes the modelling of the 3D structure and position-velocity (P-V) diagrams of NGC 2440, a well known planetary nebula, aiming to describe the morphology of this obj…