ISO Detections of C3 and NH in SGR B2

Details ISO Detections of C3 and NH in SGR B2 ISO Detections of C3 and NH in SGR B2

Nov 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000esasp.456...99g&link_type=abstract

ISO beyond the peaks: The 2nd ISO workshop on analytical spectroscopy. Eds. A. Salama, M.F.Kessler, K. Leech & B. Schulz. ESA-SP

Physics

2

Infrared: Ism: Lines And Bands, Ism: Molecules-, Ine: Identification, Molecular Data-, Adiative Transfer- Ism: Individual (Sgrb2)

Scientific paper

We present ISO/LWS Fabry-Perot data of the prominent Sagittarius B2 molecular cloud. Several ro-vibrational lines of triatomic carbon, C3, have been detected towards the central position of the cloud. Preliminary calculations indicate χ(C3)≃10-8. It is the first time that pure rotational lines of NH have been observed in the dense interstellar medium towards the galactic center. The abundance of NH is a few 10-9. We also report a tentative first detection of SH rotational lines. Polyatomic molecules will have a weak contribution from their pure rotational transitions to the far-infrared spectrum. However, we suggest that they could be, through their low-lying vibrational bending modes, the dominant carriers of emission/absorption in the spectrum of bright far-infrared sources.

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