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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 ...
Hunting young white dwarfs at the Center of Planetary Nebulae
(IOP Publishing, 2019-09)
We present Gemini-South observations of nine faint and extended planetary nebulae (PNe). Using direct images taken with the spectrograph Gemini-South multi-object spectrograph (GMOS), we built the (u¢-g¢) versus (g¢-r¢) ...
Modelling the warm H(2) infrared emission of the Helix nebula cometary knots
(WILEY-BLACKWELL, 2011)
Molecular hydrogen emission is commonly observed in planetary nebulae. Images taken in infrared H(2) emission lines show that at least part of the molecular emission is produced inside the ionized region. In the best studied ...
When nature tries to trick us: An eclipsing eccentric close binary superposed on the central star of the planetary nebula M 3-2
(EDP Sciences, 2018-11)
Bipolar planetary nebulae (PNe) are thought to result from binary star interactions and, indeed, tens of binary central stars of PNe have been found, in particular using photometric time-series that allow for the detection ...