Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aipc..848..497t&link_type=abstract
RECENT ADVANCES IN ASTRONOMY AND ASTROPHYSICS: 7th International Conference of the Hellenic Astronomical Society. AIP Conferenc
Astronomy and Astrophysics
Astrophysics
Planetary Nebulae, Hii Regions, Emission And Reflection Nebulae
Scientific paper
The emission-line analysis of ionized gaseous nebulae such as planetary nebulae (PNe) and H II regions is one of the best established methods for obtaining the abundance of elements in our own and in external galaxies. Abundance studies of PNe reveal the composition of matter returned to the interstellar medium (ISM) after being processed by stellar nucleosynthesis, while those of H II regions provide a snapshot of the composition of the ISM in the latest episode of its evolution. We discuss current issues in these related fields, and show how concerted efforts from observational spectroscopy and detailed models have been instrumental in proposing solutions for outstanding problems in the astrophysics of photoionized nebulae, and could motivate developments on ISM chemical evolution topics. The potential of Greek astronomy in the pursuit of relevant research with modern local facilities such as the Aristarchos telescope is noted.
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