SIMBAD references

2003A&A...402L..69L - Astronomy and Astrophysics, volume 402L69-72 (2003/5-2)

First NH3 detection of the Orion Bar.

LARSSON B., LISEAU R., BERGMAN P., BERNATH P., BLACK J.H., BOOTH R.S., BUAT V., CURRY C.L., ENCRENAZ P., FALGARONE E., FELDMAN P., FICH M., FLOREN H.-G., FRISK U., GERIN M., GREGERSEN E.M., HARJU J., HASEGAWA T., JOHANSSON L.E.B., KWOK S., LECACHEUX A., LILJESTROEM T., MATTILA K., MITCHELL G.F., NORDH L., OLBERG M., OLOFSSON G., PAGANI L., PLUME R., RISTORCELLI I., SANDQVIST A., VON SCHEELE F., TOTHILL N.F.H., VOLK K., WILSON C.D. and HJALMARSON A.

Abstract (from CDS):

Odin has successfully observed three regions in the OrionA cloud, i.e. Ori KL, Ori S and the Orion Bar, in the 572.5GHz rotational ground state line of ammonia, ortho-NH3 (J,K)=(1,0)->(0,0), and the result for the Orion Bar represents the first detection in an ammonia line. Several velocity components are present in the data. Specifically, the observed line profile from the Orion Bar can be decomposed into two components, which are in agreement with observations in high-J CO lines by Wilson et al. (2001ApJ...557..240W). Using the source model for the Orion Bar by these authors, our Odin observation implies a total ammonia abundance of NH3/H2=5x10–9.

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Journal keyword(s): ISM: individual objects: Orion A - clouds - molecules - abundances - stars: formation

Simbad objects: 4

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