Discovery of Neptune's ring at La Silla

in The Messenger (1985), 42

The unexpected rediscovery of the Uranian rings in 1977 and the discovery of the faint Jovian rings in 1979 led to an intensified search for rings around Neptune. A description is given of observing ... [more ▼]

The unexpected rediscovery of the Uranian rings in 1977 and the discovery of the faint Jovian rings in 1979 led to an intensified search for rings around Neptune. A description is given of observing programs at the European Southern Observatory (ESO) in Chile, which led to a discovery of such a ring, taking into account the utilization of the ESO 0.5 m and 1 m telescopes. The discovery is based on observations made on the night of July 22, 1984, in connection with a stellar occultation by the planet. Explanations for the observed differences in shape and timing of the occultation event, as recorded by both telescopes, are discussed. The obtained conclusions could be confirmed by a study of the results of a group of American astronomers working at the Cerro Tololo observatory. The observations strongly favor the existence of, at least, a part of a ring which has a width of roughly 10-15 km over a length of at least 100 km. [less ▲]

Radial velocities along the light curve of the peculiar emission-line star GG Carinae

in Astronomy and Astrophysics (1985), 153

Measurements of the radial velocities of several emission and absorption lines in a large series of high dispersion spectra of the peculiar emission-line object GG Carinae are combined with the ... [more ▼]

Measurements of the radial velocities of several emission and absorption lines in a large series of high dispersion spectra of the peculiar emission-line object GG Carinae are combined with the photometric data described by Gosset et al. (1984) in an attempt to derive constraints on a qualitative physical model of this peculiar, and most probably binary, object. Previously unreported spectral features are the double absorption components of the Balmer lines and the He I absorption lines appearing around phase phi = 0.45 of the 31.02 day period deduced from the radial velocity curve. [less ▲]

Contrôle de l'efficacité du traitement fibrinolytique par mesures répétées de la CK-MB sérique chez le patient atteint d'infarctus myocardique aigu

Poster (1985, December)

Carcinoïde appendiculaire - Stratégie thérapeutique. L'hémicolectomie est-elle nécessaire?

Conference (1985, November 30)

Occultation detection of a Neptune ring segment

in Journal of Geophysical Research. Supplement (1985, November 01), 90

A stellar occulation event of Neptune revealed a ring segment that was previously undetected. It appears that the object is not a complete ring, but rather a localized swarm of particles which follows a ... [more ▼]

A stellar occulation event of Neptune revealed a ring segment that was previously undetected. It appears that the object is not a complete ring, but rather a localized swarm of particles which follows a ring orbit over a limited range of longitudes. To avoid confusion with the standard use of the word ring it is suggested that the feature be called an arc. The distance of the arc zone is not precisely known because so far there has been no confirmed occultation by both an arc and the planet. [less ▲]

Photometry of the G8V Star HD 192020

in Information Bulletin on Variable Stars (1985), 2822

Not Available

Improved detection of perioperative myocardial infarction after cardiac surgery using CK-MB mass measurements

Conference (1985, November)

Hydrophobic reverse derivitization for secondary ion mass spectrometry/fast atom bombardment

in Organic Mass Spectrometry (1985), 20(11), 692-693

New method to increase the signal in soft ionization methods

Silhouette Understanding System for Laser-radar Range Imagery

Conference (1985, November)

Contribution de la Chimie clinique au diagnostic et au pronostic et au pronostic de l'infarctus du myocarde

Poster (1985, October 29)