The Spectrum of Comet 1947n.

in Astrophysical Journal (1948), 108

The spectrum of Comet 1947n has been observed from heliocentric distance r = 0.504 to r = 1.135 between λ 3000 and λ 8900. The OH band is unusually weak relative to NH. The (0, 0) band of CN reveals a ... [more ▼]

The spectrum of Comet 1947n has been observed from heliocentric distance r = 0.504 to r = 1.135 between λ 3000 and λ 8900. The OH band is unusually weak relative to NH. The (0, 0) band of CN reveals a complex rotational structure due to fluorescence, similar to that observed in previous comets. Features appearing within the Swan bands are described and discussed. The red region is mainly due to NH2. Two intense infrared emissions have been found for the first time at λ 7906 and λ 8106. A detailed discussion seems to indicate that they may be attributed to the red system of CN. This CN emission in the infrared does not result from fluorescence but probably from the photodissociation of a parent-molecule. No atomic lines have been found other than the D lines of Na. The two components of the nucleus reveal exactly the same spectrum. [less ▲]

Anomalies in the earliest spectral types

in Annales d'astrophysique (1948), 2(4), 228-246

Suggestions for further work on the classification of Wolf-Rayet stars are made, especially in relation with the anomalies presented by certain nuclei of planetary nebulae. In the Of-stars, in which the ... [more ▼]

Suggestions for further work on the classification of Wolf-Rayet stars are made, especially in relation with the anomalies presented by certain nuclei of planetary nebulae. In the Of-stars, in which the spectra are superpositions of typical observations O-stars and shell lines, remarkable differences occur in the relative intensities of various shell lines. The relations between X-and Of-stars are discussed. The peculiar intensities presented by certain transitions of various atoms in anomalous stars of early type are examined. The physical factors (dilution, fluorescence, departure from black body distribution, chemical composition) affecting the relative intensities of various transitions within one atom, and of various atoms relative to each other, are discussed. [less ▲]

*AUTOXYDATION DES ACIDES GRAS ET DE LEURS DERIVES

in Archives des Sciences Physiologiques (1948), 2(1-4), 305-312

The spectra of the night sky and of the aurorae

in Publications of the Astronomical Society of the Pacific [=PASP] (1948), 60