Interstellar OH+ , H2O+ and H3O+ along the sight-line to G10.6-0.4
Maryvonne Gerin
(1)
,
M. de Luca
(1)
,
John Black
(2)
,
Eric Herbst
(3, 4)
,
Javier R.Goicoechea
(5, 6)
,
Edith Falgarone
(1)
,
Benjamin Godard
(1)
,
John C. Pearson
(7)
,
Dariucz C. Lis
(8)
,
Thomas G. Phillips
(8)
,
Thomas A. Bell
(8)
,
Paule Sonnentrucker
(9)
,
Francois Boulanger
(10)
,
José Cernicharo
(5, 6)
,
Audrey Coutens
(11)
,
Emmanuel Dartois
(10)
,
Pierre Encrenaz
(1)
,
Thomas Giesen
(12)
,
Paul F. Goldsmith
(7)
,
Harshal Gupta
(7)
,
Cecile Gry
(13)
,
Patrick Hennebelle
(1)
,
Pierre Hily-Blant
(14)
,
Christine Joblin
(11)
,
Maja Kazmierczak
(15)
,
Robert Kolos
(16)
,
Jacek Krelowski
(15)
,
Jesus Martin-Pintado
(17)
,
Raquel Monje
(8)
,
Bhaswati Mookerjea
(18)
,
Michel Pérault
(1)
,
Carina Persson
(2)
,
René Plume
(19)
,
Paul B. Rimmer
(3, 4)
,
Morvan Salez
(1)
,
Mirisloaw Schmidt
(20)
,
David Teyssier
(1)
,
Charlotte Vastel
(11)
,
Shan Shan Yu
(7)
,
Alessandra Contursi
(21)
,
Karl Menten
(22)
,
Thomas Geballe
(23)
,
Stephan Schlemmer
(12)
,
Russ Shipman
(24)
,
Alexander G.G.M. Tielens
(25)
,
Sabine Philipp-May
(22, 26)
,
Alain Cros
(27)
,
Jonas Zmuidzinas
(8)
,
L.A Samoska
(7)
,
K. Klein
(26)
,
D.A. Neufeld
(9)
,
A. Lorenzani
(28)
,
Jürgen Stutzki
(12)
1
LERMA -
Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
2 OSO - Onsala Space Observatory
3 OHIO STATE UNIVERSITY - Department of Physics
4 Departments of Astronomy and Chemistry
5 CAB - Centro de Astrobiologia [Madrid]
6 CSIC - Centro de Investigaciones Biológicas
7 JPL - Jet Propulsion Laboratory
8 CSO - CalTech-CSO
9 Department of Physics and Astronomy [Baltimore]
10 IAS - Institut d'astrophysique spatiale
11 CESR - Centre d'étude spatiale des rayonnements
12 I. Physikalisches Institut [Köln]
13 LAM - Laboratoire d'Astrophysique de Marseille
14 LAOG - Laboratoire d'Astrophysique de Grenoble
15 TCfA - Torun Centre for Astronomy
16 Institute of physical chemistry
17 IEM - Instituto de Estructura de la Materia
18 TIFR - Tata Institute for Fundamental Research
19 Department of Physics and Astronomy [Calgary]
20 CAMK - Copernicus Astronomical Center of the Polish Academy of Sciences
21 MPE - Max-Planck-Institut für Extraterrestrische Physik
22 MPIFR - Max-Planck-Institut für Radioastronomie
23 Gemini Telescope
24 SRON - SRON Netherlands Institute for Space Research
25 Sterrewacht Leiden
26 DLR - Deutsches Zentrum für Luft- und Raumfahrt [Bonn]
27 LP3 - Laboratoire Lasers, Plasmas et Procédés photoniques
28 OAA - INAF - Osservatorio Astrofisico di Arcetri
2 OSO - Onsala Space Observatory
3 OHIO STATE UNIVERSITY - Department of Physics
4 Departments of Astronomy and Chemistry
5 CAB - Centro de Astrobiologia [Madrid]
6 CSIC - Centro de Investigaciones Biológicas
7 JPL - Jet Propulsion Laboratory
8 CSO - CalTech-CSO
9 Department of Physics and Astronomy [Baltimore]
10 IAS - Institut d'astrophysique spatiale
11 CESR - Centre d'étude spatiale des rayonnements
12 I. Physikalisches Institut [Köln]
13 LAM - Laboratoire d'Astrophysique de Marseille
14 LAOG - Laboratoire d'Astrophysique de Grenoble
15 TCfA - Torun Centre for Astronomy
16 Institute of physical chemistry
17 IEM - Instituto de Estructura de la Materia
18 TIFR - Tata Institute for Fundamental Research
19 Department of Physics and Astronomy [Calgary]
20 CAMK - Copernicus Astronomical Center of the Polish Academy of Sciences
21 MPE - Max-Planck-Institut für Extraterrestrische Physik
22 MPIFR - Max-Planck-Institut für Radioastronomie
23 Gemini Telescope
24 SRON - SRON Netherlands Institute for Space Research
25 Sterrewacht Leiden
26 DLR - Deutsches Zentrum für Luft- und Raumfahrt [Bonn]
27 LP3 - Laboratoire Lasers, Plasmas et Procédés photoniques
28 OAA - INAF - Osservatorio Astrofisico di Arcetri
Maryvonne Gerin
- Fonction : Auteur
- PersonId : 169617
- IdHAL : gerin
- ORCID : 0000-0002-2418-7952
- IdRef : 034111956
M. de Luca
- Fonction : Auteur
- PersonId : 1270946
- ORCID : 0000-0001-6706-6870
Eric Herbst
- Fonction : Auteur
- PersonId : 755088
- ORCID : 0000-0002-4649-2536
Francois Boulanger
- Fonction : Auteur
- PersonId : 177702
- IdHAL : francois-boulanger
- ORCID : 0000-0003-1097-6042
- IdRef : 031794645
Audrey Coutens
- Fonction : Auteur
- PersonId : 739468
- IdHAL : audrey-coutens
- ORCID : 0000-0003-1805-3920
- IdRef : 167181491
Emmanuel Dartois
- Fonction : Auteur
- PersonId : 741313
- IdHAL : emmanuel-dartois
- ORCID : 0000-0003-1197-7143
- IdRef : 136696686
Cecile Gry
- Fonction : Auteur
- PersonId : 744838
- IdHAL : cecilegry
- ORCID : 0000-0003-0788-7452
Patrick Hennebelle
- Fonction : Auteur
- PersonId : 950937
- ORCID : 0000-0002-0472-7202
- IdRef : 161792030
Pierre Hily-Blant
- Fonction : Auteur
- PersonId : 4564
- IdHAL : pierrehily-blant
- ORCID : 0000-0003-3488-8442
- IdRef : 145464385
Christine Joblin
- Fonction : Auteur
- PersonId : 21867
- IdHAL : christine-joblin
- ORCID : 0000-0003-1561-6118
- IdRef : 052563693
Charlotte Vastel
- Fonction : Auteur
- PersonId : 755850
- ORCID : 0000-0001-8211-6469
- IdRef : 059912731
Karl Menten
- Fonction : Auteur
- PersonId : 762709
- ORCID : 0000-0001-6459-0669
K. Klein
- Fonction : Auteur
- PersonId : 755603
- ORCID : 0000-0001-6038-1923
Résumé
We report the detection of absorption lines by the reactive ions OH+, H2O+ and H3O+ along the line of sight to the submillimeter continuum source G10.6$-$0.4 (W31C). We used the Herschel HIFI instrument in dual beam switch mode to observe the ground state rotational transitions of OH+ at 971~GHz, H2O+ at 1115 and 607~GHz, and H3O+ at 984 GHz. The resultant spectra show deep absorption over a broad velocity range that originates in the interstellar matter along the line of sight to G10.6$-$0.4 as well as in the molecular gas directly associated with that source. The OH+ spectrum reaches saturation over most velocities corresponding to the foreground gas, while the opacity of the H2O+ lines remains lower than 1 in the same velocity range, and the H3O+ line shows only weak absorption. For LSR velocities between 7 and 50 kms$^{-1}$ we estimate total column densities of $N$(OH+) $> 2.5 \times 10^{14}$ cm$^{-2}$, $N$(H2O+) $\sim 6 \times 10^{13}$ cm$^{-2}$ and $N$(H3O+) $\sim 4.0 \times 10^{13}$ cm$^{-2}$. These detections confirm the role of O$^+$ and OH$^+$ in initiating the oxygen chemistry in diffuse molecular gas and strengthen our understanding of the gas phase production of water. The high ratio of the OH+ by the H2O+ column density implies that these species predominantly trace low-density gas with a small fraction of hydrogen in molecular form.
Origine : Fichiers produits par l'(les) auteur(s)
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