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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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This is likely for two reasons. We therefore assume that the eight lines have the same line width.

Data correspond to usage on the plateform after Displayed integrated intensities are expressed in the main beam temperature scale. Information on key gas-phase progenitors of these molecules sheds light on this problem. Services Articles citing this article CrossRef 4563 article Next article.

We used the Ohio State University osu pure gas-phase chemical network upgraded for photochemical studies. The illuminating star is positioned at the right of the plots.

NORMA IRAM 3549 Mangas.pdf

Roueff 3M. We only consider the most stable isomers to compare the measured and modeled abundances. Laboratory spectroscopy is underway to confirm these results.


Pure gas-phase chemistry models do not succeed in reproducing the measured abundances of small hydrocarbons in the interstellar medium. We wish to know to which development order we can significantly fit the frequency model to the observed data. The legend at the bottom of the figure presents the line coding for the curves: Metrics Show article metrics.

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. Column densities and abundances with respect to the number of protons, i.

Norma IRAM Soldadura – [PDF Document]

Summary Acknowledgments References Appendix A: Initial download of the metrics may take a while. Two positions are observed: Belloche 6 and Iarm. Le Petit 3J.

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. Gratier 1V.

This is due to a combination of two effects. Current usage metrics About article metrics Return to article. The current usage metrics is available hours after online publication and is irxm daily on week days. 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.


The spectra and the Gaussian fits are shown as black histograms and green curves, respectively.

Norma Iram Iso 9712

Lines simultaneously observed in the cut displayed in Fig. List of tables List of figures.

Bardeau 1A. 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. Gerin 2J. 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.

Sievers 5F. They trace the gas physical conditions, e. The green lines are Gaussian fits. Goicoechea 4S. Irm compute the spectroscopic parameters associated with the set of unidentified lines, we used higher order improvements to the simple model of a linear rotor.

This assumption enables a quick fit convergence when we start the fit with the following initial values: