Raies Nébulaires et Coronales dans le Spectre Infrarouge de la Nova Delphini

Details Raies Nébulaires et Coronales dans le Spectre Infrarouge de la Nova Delphini Raies Nébulaires et Coronales dans le Spectre Infrarouge de la Nova Delphini

Jan 1970

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1970ap%26ss...6...36a&link_type=abstract

Astrophysics and Space Science, Volume 6, Issue 1, pp.36-44

Astronomy and Astrophysics

Astrophysics

10

Scientific paper

Nova Delphini 1967 has been observed in the red and photographic infrared at the Haute-Provence Observatory from September 7 to November 12, 1968. Dispersions range from 230 Å/mm to 4 Å/mm. The slope of the continuous spectrum in the region 1.3 1.7 μ-1 leads to a gradient of 3.06, which did not appear to vary during the observing period. This gradient is, however, very different from the value 1.71 measured on plates secured in August 1968. Lines of Hi, He i, He ii, Fe ii, Oi, Cii and forbidden transitions due to Oi, Oii, Fe vii, Fe x, Fe xi, Siii, Aiii, Av, Axi and Ni xv have been identified. Their intensities at various dates are given in Table II. Line profiles could be measured for a few lines taken on a 39 Å/mm spectrogram on October 3. He i λ 6678 and λ 7065 are displayed on Figures 2 and 3. Figure 4 gives the [O ii] doublet at λ 7319 7330, while the Hα profile, obtained on October 4 can be seen on Figure 5. The line extends over more than 45 Å and narrow absorptions are seen at λλ 6551.05; 6555.75; 6563.15; 6571.49; 6574.45. Due to the absence of published data on radial velocities of absorption lines in the visible spectrum at that time, it is not possible to give a clear identification for these features. Some of them may belong to Hα, while others are probably due to metals.

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