molecules:extragalactic:menh2_extragalactic [CDMS classic documentation]

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===== On the Detection of the Methylamine, CH3NH2, in Extragalactic Sources =====

S. Muller, A. Beelen, M. Guélin, S. Aalto, J. H. Black, F. Combes, S. J. Curran, P. Theule, and S. N. Longmore\\
used the Australia Telescope Compact Array (ATCA) to study the molecular content of a foreground galaxy at //z// = 0.89 (FG0.89 consisting of two subsources, FG0.89SW and FG0.89NO) in absorption toward the quasar PKS 1830-211:\\
**[[https://doi.org/10.1051/0004-6361/201117096|Molecules at //z// = 0.89: A 4-mm-Rest-Frame Absorption-Line Survey toward PKS 1830-211]]**\\
//Astron. Astrophys.// **535**, (2011) Art. No. A103.\\
Methylamine, CH<sub>3</sub>NH<sub>2</sub>, is an asymmetric top rotor displaying considerable splitting caused by the internal rotation of the CH<sub>3</sub> group and the inversion of the NH<sub>2</sub> group. Three transitions with //K// = 1 – 0 have been identified; two with //J'// = //J"// = 1 at rest frequencies of 79008 and 89956 MHz, respectively, and one with //J'// = //J"// = 2 at 78135 MHz. Even though the number of lines is a bit small, the detection can probably be viewed as secure because of the moderate line number density.


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Contributor(s): H. S. P. Müller; 5, 2012

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