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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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Two positions are observed: We only consider the most stable isomers to compare the measured and modeled abundances. The illuminating star is positioned at the right of the plots. Gratier 1V. Previous article Next article. Services Articles citing this article CrossRef Le Bourlot 3A. 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.

Gerin 2J. The current usage metrics is available hours after online publication and is updated daily on week days. Lines simultaneously observed in the cut displayed in Fig.

This led us to conclude that the species is a reactive molecule with a spatial distribution similar to small hydrocarbon chains. 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 legend at the bottom of iam figure presents the line coding for the curves: Pure gas-phase chemistry models do not succeed in reproducing the measured abundances of small hydrocarbons in the interstellar medium.


Information on key gas-phase progenitors of these molecules sheds light on this problem. Goicoechea 4S.

The green lines are Gaussian fits. Laboratory spectroscopy is underway to confirm these results. 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.

Scientific Results in Press

Metrics Show article metrics. Le Petit 3J. 45366 correspond to usage on the plateform after We therefore assume that the eight lines have the same line width. Summary Acknowledgments References Appendix A: We used the Ohio State University osu pure gas-phase chemical network upgraded for photochemical studies. Column densities and abundances with respect to the number of protons, i.

This assumption enables a quick fit convergence when we start the fit with the following initial values: Initial download of the metrics may take a while. This is likely for two reasons. Molecular ions play an important role in the physics and chemistry of the insterstellar medium.


Displayed integrated intensities are expressed in the main beam temperature scale.

Bardeau 1A. The spectra and the Gaussian fits are shown as black histograms and green curves, respectively.

Norma Iram Iso 9712

Carretera de Ajalvir, Km 4. Roueff 3M. 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. Current usage metrics About iraj metrics Return to article.

Janssen, Meudon Cedex, France e-mail: Sievers 5F.

List of tables List of figures. We aim to constrain the chemical content of the 45536 mane with a millimeter unbiased line survey at two positions, namely the photo-dissociation region PDR and the nearby shielded core. They trace the gas physical conditions, e. Belloche 6 and D. We wish to know to which development order we can significantly fit the frequency model to the observed data.