A Spectral Line Survey of Selected 3 mm Bands Toward Sagittarius B2(N-LMH) Using the NRAO 12 Meter Radio Telescope and the BIMA Array I. The Observational Data

We have initiated a spectral line survey, at a wavelength of 3 millimeters, toward the hot molecular core Sagittarius B2(N-LMH). This is the first spectral line survey of the Sgr B2(N) region utilizing data from both an interferometer (BIMA Array) and a single-element radio telescope (NRAO 12 meter). In this survey, covering 3.6 GHz in bandwidth, we detected 218 lines (97 identified molecular transitions, 1 recombination line, and 120 unidentified transitions). This yields a spectral line density (lines per 100 MHz) of 6.06, which is much larger than any previous 3 mm line survey. We also present maps from the BIMA Array that indicate that most highly saturated species (3 or more H atoms) are products of grain chemistry or warm gas phase chemistry. Due to the nature of this survey we are able to probe each spectral line on multiple spatial scales, yielding information that could not be obtained by either instrument alone.Comment: 35 pages, 15 figures, to be published in The Astrophysical Journa

Spectre micro-onde de deux états vibrationnels excités de l'acide formique. Effet d'une résonance de Coriolis forte

Les spectres micro-ondes des états vibrationnels excités ν7 et ν9 de l'acide formique ont été identifiés et mesurés. Ces états vibrationnels sont en résonance de type Coriolis forte. Un modèle théorique simplifié a été utilisé ; il permet de proposer des constantes de rotation et d'interaction.Samson C., Steenbeckeliers Guy, Willemot Edmond, Bellet Jean. Spectre micro-onde de deux états vibrationnels excités de l'acide formique. Effet d'une résonance de Coriolis forte. In: Bulletin de la Classe des sciences, tome 56, 1970. pp. 921-926