2010A&A...518L.109P


Query : 2010A&A...518L.109P

2010A&A...518L.109P - Astronomy and Astrophysics, volume 518, L109-109 (2010/7-2)

Herschel observations of EXtra-Ordinary Sources (HEXOS): detection of hydrogen fluoride in absorption towards Orion KL.

PHILLIPS T.G., BERGIN E.A., LIS D.C., NEUFELD D.A., BELL T.A., WANG S., CROCKETT N.R., EMPRECHTINGER M., BLAKE G.A., CAUX E., CECCARELLI C., CERNICHARO J., COMITO C., DANIEL F., DUBERNET M.-L., ENCRENAZ P., GERIN M., GIESEN T.F., GOICOECHEA J.R., GOLDSMITH P.F., HERBST E., JOBLIN C., JOHNSTONE D., LANGER W.D., LATTER W.D., LORD S.D., MARET S., MARTIN P.G., MELNICK G.J., MENTEN K.M., MORRIS P., MUELLER H.S.P., MURPHY J.A., OSSENKOPF V., PEARSON J.C., PERAULT M., PLUME R., QIN S.-L., SCHILKE P., SCHLEMMER S., STUTZKI J., TRAPPE N., VAN DER TAK F.F.S., VASTEL C., YORKE H.W., YU S., ZMUIDZINAS J., BOOGERT A., GUESTEN R., HARTOGH P., HONINGH N., KARPOV A., KOOI J., KRIEG J.-M. and SCHIEDER R.

Abstract (from CDS):

We report a detection of the fundamental rotational transition of hydrogen fluoride in absorption towards Orion KL using Herschel/HIFI. After the removal of contaminating features associated with common molecules (``weeds''), the HF spectrum shows a P-Cygni profile, with weak redshifted emission and strong blue-shifted absorption, associated with the low-velocity molecular outflow. We derive an estimate of 2.9x1013cm–2 for the HF column density responsible for the broad absorption component. Using our best estimate of the H2 column density within the low-velocity molecular outflow, we obtain a lower limit of ∼1.6x10–10 for the HF abundance relative to hydrogen nuclei, corresponding to ∼0.6% of the solar abundance of fluorine. This value is close to that inferred from previous ISO observations of HF J=2-1 absorption towards Sgr B2, but is in sharp contrast to the lower limit of 6x10–9 derived by Neufeld et al. (2010A&A....518L.108N) for cold, foreground clouds on the line of sight towards G10.6-0.4.

Abstract Copyright:

Journal keyword(s): ISM: abundances - ISM: molecules - submillimeter: ISM

Simbad objects: 5

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Number of rows : 5
N Identifier Otype ICRS (J2000)
RA
ICRS (J2000)
DEC
Mag U Mag B Mag V Mag R Mag I Sp type #ref
1850 - 2023
#notes
1 V* V2254 Ori Or* 05 35 14.11296 -05 22 22.7316           B 305 2
2 NAME Orion-KL SFR 05 35 14.16 -05 22 21.5           ~ 2207 1
3 NAME Orion Core ? 05 35 14.5 -05 22 30           ~ 194 0
4 NAME Sgr B2 MoC 17 47 20.4 -28 23 07           ~ 2148 1
5 W 31c HII 18 10 29.1 -19 56 05           ~ 329 0

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2023.01.30-23:02:20

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