Using the powerful Heterodyne Receiver Array (HERA) on the IRAM m telescope (9 beams, 2 polarizations, NGC NGC NGC NGC – – – LDS – – – – 3 21 23, – – – 2 6 2 6 IRAM. from wastewater by maghemite nanoparticles. Water Research, , 39(18): – Iram M, Guo C, Guan Yet al. Adsorption and magnetic removal of.

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Norma Iram Iso 9712

Carretera de Ajalvir, Km 4. The left column presents the profiles computed by the code, which samples the UV-illuminated gas on a finer spatial grid than the UV-shielded gas to correctly represent the steep physical and chemical gradients.

This led us to conclude that the species is a reactive molecule with a spatial distribution similar to small hydrocarbon chains. Sievers 5F. Lines simultaneously observed in the cut displayed in Fig.

Services Articles citing this article CrossRef The green lines are Gaussian fits. Belloche 6 and D. Summary Acknowledgments References Appendix A: Displayed integrated intensities are expressed in the main beam temperature scale. Itam is due to a combination of two effects. The illuminating star is positioned at the right of the plots. We wish to 453 to which development order we can significantly fit the frequency model to the observed data.


Pure gas-phase chemistry models do not succeed in reproducing the measured abundances of small hydrocarbons in the interstellar medium.

We used the Ohio State University osu pure gas-phase chemical network upgraded for photochemical studies. They trace the gas physical conditions, e. Current usage metrics About article metrics Return to article.

NORMA IRAM 3549 Mangas.pdf

The measured abundances are typically one and two orders of magnitude higher than the modeled abundances for C 2 H and C 3 H 2. Gratier 1V. Gerin 2J.

This assumption enables a quick fit convergence when we start the fit with the following initial values: Simple hydrocarbon molecules, such as C 2 H, C 3 H, and C 3 H 2 have been detected in a wide variety of sources from diffuse e.

List of tables List of figures. The legend at the bottom of the figure presents the line coding for the curves: Contour levels are shown in the grey-scale lookup tables.

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Initial download of the metrics may take a while. Goicoechea 4S. Janssen, Meudon Cedex, France e-mail: Data correspond to usage on the plateform after We therefore assume that the eight lines have the same line width. We only consider the most stable isomers to compare the measured and modeled abundances.


Molecular ions play an important role in the physics and chemistry of the insterstellar medium. Metrics Show 44536 metrics. Previous article Next article. We aim to constrain the chemical content of the Horsehead mane with a millimeter unbiased line survey at two positions, namely the photo-dissociation region PDR and the nearby shielded core.

Two positions are observed: Le Bourlot 3A. Le Petit 3J. The current usage metrics is available hours after online irram and is updated daily on week days.

This is likely for two reasons. Indeed, the modeled and predicted abundances of c-C 3 H 2 are consistent, while the modeled abundance of C 2 H is still one order of magnitude lower than the measured abundance cf.

Norma IRAM Soldadura – [PDF Document]

Roueff 3M. To compute the spectroscopic parameters associated with the set of unidentified lines, we used higher order improvements to the simple model of a linear rotor. The spectra and the Gaussian fits are shown as black histograms and green curves, respectively. Bardeau 1A.