The shell spectrum of BD- 14° 1971 (PGG 1985) in 1947

in Annales d'astrophysique (1950), 13(2), 134-145

Boss 1985 a révélé en fin 1947, un spectre entièrement différent de ce qui avait été observé précédemment. La région ultraviolette est caractérisée par d'intenses raies d'absorption du genre de celles que ... [more ▼]

Boss 1985 a révélé en fin 1947, un spectre entièrement différent de ce qui avait été observé précédemment. La région ultraviolette est caractérisée par d'intenses raies d'absorption du genre de celles que l'on observe dans les étoiles à atmosphère étendue (table I). Les raies d'émission de Fe II, [Fe II] et [Ni II] sont restées à peu près les mêmes que précédemment (table 2). Le spectre ultraviolet est comparé à ceux d'étoiles très étendue. L'analogie de B 1985 et de VV Cephei est discutée. De nouvelles observations tant photométriques que spectroscopiques sont désirables. [less ▲]

Remarques sur les systèmes catadioptriques de Bouwers

in Bulletin de la Société Royale des Sciences de Liège (1950), (3), 168-176

L'auteur donne des expressions algébriques et des exemples numériques pour les systèmes optiques dans lesquels l'aberration sphérique d'un ou plusieurs miroirs sphériques est compensée par celle d'un ... [more ▼]

L'auteur donne des expressions algébriques et des exemples numériques pour les systèmes optiques dans lesquels l'aberration sphérique d'un ou plusieurs miroirs sphériques est compensée par celle d'un ménisque de faible puissance, mais de grand facteur de forme. La correction par une lame plan-parallèle est aussi envisagée. [less ▲]

The infrared spectra of the Planetary Nebulae BD+30°3639, NGC 6572, and NGC 6543

in Publications of the Astronomical Society of the Pacific [=PASP] (1949), 61

The Spectra of the Night Sky and the Aurora

in Kuiper, Gerard Peter (Ed.) The atmospheres of the earth and planets: papers presented at the Fiftieth Anniversary Symposium of the Yerkes Observatory, September, 1947 (1949)

Description of the night-sky and twilight spectra Description of auroral spectra Interpretation of the observations Conclusions

The spectra of the night sky and of the aurorae

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

Polyatomic molecules in late-type stars.

in Astrophysical Journal (1948), 108

Some general problems connected with the presence of polyatomic molecules in stellar atmospheres are noted, and, in particular, reasons are advanced in favor of attributing at least part of the intensity ... [more ▼]

Some general problems connected with the presence of polyatomic molecules in stellar atmospheres are noted, and, in particular, reasons are advanced in favor of attributing at least part of the intensity drop and fluctuations in the spectra of the N-type stars violetward of λ 4100 to the triatomic molecule CH2. [less ▲]

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 ▲]

The relative intensities of the coronal and other forbidden lines.

in Astrophysical Journal (1947), 105

The behavior of the coronal lines in RS Ophiuchi, T Pyxidis, and T Coronae Borealis is in accord with the physical properties of these lines as predicted from Edlén's identifications. Observed anomalies ... [more ▼]

The behavior of the coronal lines in RS Ophiuchi, T Pyxidis, and T Coronae Borealis is in accord with the physical properties of these lines as predicted from Edlén's identifications. Observed anomalies in the relative abundance of certain ions in these and similar objects may be explained by irregularities in the intensity-curve of the primary exciting radiation of the central star, caused by H and He II continuous absorption. One line in the RS Oph spectrum is identified with [K XI]. [less ▲]

The problem of the rare earths in α2 Canum Venaticorum

in Publications of the American Astronomical Society (1946), 10

New results on forbidden transitions of [FE II], [FE III], [FE V], [FE VII], and [FE X] in stellar spectra

in Publications of the American Astronomical Society (1946)