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Molecular chemistry and the missing mass problem in planetary nebulae
(EDP SCIENCES S ALES ULIS CEDEX A, 2012)
Context. Detections of molecular lines, mainly from H-2 and CO, reveal molecular material in planetary nebulae. Observations of a variety of molecules suggest that the molecular composition in these objects differs from ...
Age distribution of the central stars of galactic disk planetary nebulae
(EDP SCIENCES S A, 2010)
Context. Determination of the ages of central stars of planetary nebulae (CSPN) is a complex problem, and there is presently no single method that can be generally applied. We have developed several methods of estimating ...
PLANETARY NEBULAE IN THE INNER MILKY WAY: NEW ABUNDANCES
(UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA, 2010)
The study of planetary nebulae in the inner-disk and bulge gives important information on the chemical abundances of elements such as He, N, O, Ar, Ne, and on the evolution of these abundances, which is associated with the ...
Atlas of monochromatic images of planetary nebulae
(EDP Sciences, 2016-08)
We present an atlas of more than one hundred original images of planetary nebulae (PNe). These images were taken in a narrow-band filter centred on the nebular emission of the [N ii] during several observing campaigns using ...
PLANETARY NEBULAE AND THE CHEMICAL EVOLUTION OF THE MAGELLANIC CLOUDS
(UNIV NACIONAL AUTONOMA MEXICO, INST DE ASTRONOMIA, 2009)
The determination of accurate chemical abundances of planetary nebulae (PN) in different galaxies allows us to obtain important constraints on chemical evolution models for these systems. We have a long-term program to ...