Nova Delphini 1967. Observations du spectre nebulaire entre 5600 et 8800 Å en 1970

Details Nova Delphini 1967. Observations du spectre nebulaire entre 5600 et 8800 Å en 1970 Nova Delphini 1967. Observations du spectre nebulaire entre 5600 et 8800 Å en 1970

Sep 1971

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1971ap%26ss..13..100a&link_type=abstract

Astrophysics and Space Science, Volume 13, Issue 1, pp.100-105

Astronomy and Astrophysics

Astrophysics

10

Scientific paper

Five 230 Å/mm infrared spectra of Nova Delphini 1967 have been obtained from May to September 1970 on Kodak hypersensitized IN plates. Visual brightness has dropped by one magnitude between fall 1969 and fall 1970. The continuous spectrum remains strong and a mean value of 2.35 is found for the gradient in the region 6000 8000 Å, indicating a slight increase in temperature since 1969. Permitted lines of Hi, Oi, He i, Fe ii are weakening, while intensities of forbidden transitions due [N ii], [Fe vii], [O i], [O ii], [A iii], [A v], [Fe vii], [Fe x], [Fe xi], [Fe xi], [Ni xv] are much more stable At the dispersion of our spectra, there is little evidence of activity in the nova shell during 1970. Temperature seems to be slightly increasing in the lower layers as well as in the external, low density regions.

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