Astronomy and Astrophysics – Astrophysics
Scientific paper
Aug 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...235..403h&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 235, no. 1-2, Aug. 1990, p. 403-406.
Astronomy and Astrophysics
Astrophysics
2
Astronomical Spectroscopy, Charge Coupled Devices, Emission Spectra, Planetary Nebulae, H Alpha Line, Halos, Line Spectra, Nitrogen, Oxygen, Stellar Mass
Scientific paper
The detection of an 80 x 40 arcsec nebulosity 50 arcsec north-east of the double halo planetary nebula PK 29 -5 deg 1 (NGC 6751) is reported. The emission nebula, which displays a rectangular shape, was detected through interference filters centered at H-alpha, forbidden N II 6583 A and forbidden O III 5007 A, but was not seen in H-beta, in the direct imaging mode using the RCA3 CCD detector at the f/6 Newtonian focus of the Observatoire de Haute Provence 120 cm telescope.
Hua Chon-Trung
Louise R.
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