Many complex organic molecules and inorganic solid-state compounds have been observed in the circumstellar shell of stars (both C-rich and O-rich) in the...
More Evidence for a Population of Intracluster Planetary Nebulae in the Virgo Cluster
We surveyed a 50 arcmin 2 region in the Virgo cluster core to search for intergalactic planetary nebulae and found 11 candidates in the surveyed area. The...
Multi-level non-LTE calculations for very optically thick winds and photospheres under extreme NLTE conditions
A new technique to calculate multilevel non-LTE continuum formation in the UV of stellar winds and plane-parallel, static stellar atmospheres is developed using...
Multiple collimated outflows in a planetary nebula?
We present high resolution images and high dispersion spectra of the planetary nebula IC 4593. Benefiting from superb seeing (0″.4), the narrowband images...
MUSE crowded field 3D spectroscopy in NGC 300. I. First results from central fields
Aims: As a new approach to the study of resolved stellar populations in nearby galaxies, our goal is to demonstrate with a pilot study in NGC 300 that integral...
MUSE spectroscopy of planetary nebulae with high abundance discrepancies
We present MUSE deep integral-field unit spectroscopy of three planetary nebulae (PNe) with high-abundance discrepancy factors (ADF > 20): NGC 6778, M 1-42, and...
MUSE spectroscopy of the high abundance discrepancy planetary nebula NGC 6153
Context. The abundance discrepancy problem in planetary nebulae (PNe) has long puzzled astronomers. NGC 6153, with its high abundance discrepancy factor (ADF ~...
NanoSpace: Networking as a tool to understand carbon molecular nanostructures in planetary nebulae
I present a short overview of the COST Action NanoSpace ("Carbon molecular nanostructures in space"; CA21126) together with the most recent updates. This...