Study of the planetary nebula NGC 2438. I. Spectroscopy of the nebula and of some cluster stars

Astronomy and Astrophysics – Astronomy

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Scientific paper

We found 36 emission lines in the spectrum of the planetary nebula NGC 2438, and we determined its exc. class to be about 6-7. The nebular RV_hel = 60.3+/- 3.6 km/s (5 spectra) is in agreement with RV_hel = 60.8 +/- 4.0 km/s of 4 cluster stars (10 spectra). We conclude that contrary to earlier statements the nebula is probably associated with the cluster.

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