2003A&A...402L..73L

Query : 2003A&A...402L..73L

2003A&A...402L..73L - Astronomy and Astrophysics, volume 402L73-76 (2003/5-2)

First detection of NH3 (10 ->00) from a low mass cloud core. On the low ammonia abundance of the ρ Oph A core.

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

Abstract (from CDS):

Odin has successfully observed the molecular core ρ Oph A in the 572.5GHz rotational ground state line of ammonia, NH3 (JK=10->00). The interpretation of this result makes use of complementary molecular line data obtained from the ground (C17O and CH3OH) as part of the Odin preparatory work. Comparison of these observations with theoretical model calculations of line excitation and transfer yields a quite ordinary abundance of methanol, X(CH3OH)=3x10–9. Unless NH3 is not entirely segregated from C17O and CH3OH, ammonia is found to be significantly underabundant with respect to typical dense core values, viz. X(NH3)=8x10–10.

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Journal keyword(s): ISM: individual objects: ρ Oph A - clouds - molecules - stars: formation

Simbad objects: 4

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Number of rows : 4
N Identifier Otype ICRS (J2000)
RA 		ICRS (J2000)
DEC 		Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2026 		#notes
1 * rho Oph A SB* 16 25 35.1185711280 -23 26 49.831640736 4.3 5.22 5.05     B1V 444 0
2 NAME rho Oph A Cloud MoC 16 26 26.4 -24 22 33           ~ 312 1
3 NAME rho Oph C Cloud MoC 16 26 53.1 -24 32 31           ~ 80 0
4 NAME Ophiuchus Molecular Cloud SFR 16 28 06 -24 32.5           ~ 3969 1

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