Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980a%26a....90....8h&link_type=abstract
Astronomy and Astrophysics, vol. 90, no. 1-2, Oct. 1980, p.8-13.
Astronomy and Astrophysics
Astrophysics
6
Astronomical Photometry, Emission Spectra, Galactic Radiation, Planetary Nebulae, Abundance, H Alpha Line, Helium, Photons
Scientific paper
A recent spectrophotometric study of some galactic gaseous nebulae and galaxies made using image photon counting techniques (IPCS), coupled to the Pellet-Deharveng spectrograph attached at the Cassegrain focus of the 193-cm telescope of the Haute Provence Observatory are presented. From the examination of the spectra obtained, it turns out that the IPCS performance is very useful in the observation of low surface brightness nebulae and in the detection of faint emission lines. The physical parameters (electron density, relative ionic abundance for He I) derived from the observed line intensity ratios, as well as the radial velocities, are in rather good agreement with previous investigations.
Doan N. H.
Donas Jose
Hua Chon-Trung
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