Peer-Reviewed Journal Details
Mandatory Fields
Phillips, TG;Bergin, EA;Lis, DC;Neufeld, DA;Bell, TA;Wang, S;Crockett, NR;Emprechtinger, M;Blake, GA;Caux, E;Ceccarelli, C;Cernicharo, J;Comito, C;Daniel, F;Dubernet, ML;Encrenaz, P;Gerin, M;Giesen, TF;Goicoechea, JR;Goldsmith, PF;Herbst, E;Joblin, C;Johnstone, D;Langer, WD;Latter, WD;Lord, SD;Maret, S;Martin, PG;Melnick, GJ;Menten, KM;Morris, P;Muller, HSP;Murphy, JA;Ossenkopf, V;Pearson, JC;Perault, M;Plume, R;Qin, SL;Schilke, P;Schlemmer, S;Stutzki, J;Trappe, N;van der Tak, FFS;Vastel, C;Yorke, HW;Yu, S;Zmuidzinas, J;Boogert, A;Gusten, R;Hartogh, P;Honingh, N;Karpov, A;Kooi, J;Krieg, JM;Schieder, R
2010
July
Astronomy and Astrophysics
Herschel observations of EXtra-Ordinary Sources (HEXOS): Detection of hydrogen fluoride in absorption towards Orion KL
Published
29 ()
Optional Fields
MOLECULAR-SPECTROSCOPY ROTATIONAL-EXCITATION COLOGNE DATABASE LINE SURVEY REGION CLOUDS WATER SUBMILLIMETER SATELLITE EMISSION
518
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 2.9 x 10(13) cm(-2) for the HF column density responsible for the broad absorption component. Using our best estimate of the H(2) column density within the low-velocity molecular outflow, we obtain a lower limit of similar to 1.6 x 10(-10) for the HF abundance relative to hydrogen nuclei, corresponding to similar 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 6 x 10(-9) derived by Neufeld et al. for cold, foreground clouds on the line of sight towards G10.6-0.4.
LES ULIS CEDEX A
0004-6361
10.1051/0004-6361/201014570
Grant Details