Upper limits to interstellar NH+ and para-NH2− abundances - Herschel-HIFI observations towards Sgr B2 (M) and G10.6−0.4 (W31C)

C. M. Persson; M. Hajigholi; G. E. Hassel; A. O. H. Olofsson; J. H. Black; E. Herbst; H. S. P. Müller; J. Cernicharo; E. S. Wirström; M. Olberg; Å. Hjalmarson; D. C. Lis; H. M. Cuppen; M. Gerin; K. M. Menten

doi:10.1051/0004-6361/201423748

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Volume 567 (July 2014)

A&A, 567 (2014) A130

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Fig. 1

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G10.6−0.4: searches for NH⁺ and p-NH show no detections at the source velocity −3 km s^-1 (marked in blue) or the line-of-sight absorption at 10–55 km s^-1 (marked in red). The ortho-NH₂ and CH₃OH emission lines originate in the G10.6−0.4 molecular cloud.

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