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...
Narrow band survey for intragroup light in the Leo HI cloud. Constraints on the galaxy background contamination in imaging surveys for intracluster planetary nebulae
We have observed emission line objects located in a 0.26 deg2 field in the M 96 (Leo) group, coincident with the intergalactic HI cloud. The emission line...
Nature Versus Nurture: the Influence of the Environment in the Formation of Asymmetries
The association of a star with the different galactic components determines on a first order its velocity within the Galaxy. This stellar motion influences the...