Astronomy and Astrophysics – Astronomy
Scientific paper
May 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989a%26a...215..113g&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 215, no. 1, May 1989, p. 113-118.
Astronomy and Astrophysics
Astronomy
13
H Ii Regions, Infrared Astronomy, Interstellar Extinction, Line Spectra, Orion Nebula, Balmer Series, Galactic Evolution, H Alpha Line, H Beta Line, Stellar Spectra
Scientific paper
Using the Orion nebula as typical example of H II regions, it is demonstrated that the differential extinction can be derived precisely from (P-gamma)/(H-delta) and forbidden S II blue and IR line ratios observed with long-slit CCD spectroscopy. This spectroscopic imaging technique allows a correct elimination of perturbing atmospheric sky emission lines in the IR wavelength region, so that this technique may become a useful diagnostic tool for other H II regions.
Barnett E. W.
Goetz Martin
Greve Albert
McKeith Conal D.
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