Interstellar OH+, H2O+ and H3O+ along the sight-line to G10.6–0.4

@article{Gerin2010InterstellarOH,
  title={Interstellar OH+, H2O+ and H3O+ along the sight-line to G10.6–0.4},
  author={Maryvonne Gerin and Massimo De Luca and John H. Black and Eric Herbst and Javier R.Goicoechea and Edith Falgarone and Benjamin Godard and John C. Pearson and D. C. Lis and Thomas G. Phillips and Tom A. Bell and Paule Sonnentrucker and François Boulanger and Jos{\'e} Cernicharo and Audrey Coutens and Emmanuel Dartois and Pierre J. Encrenaz and Thomas F. Giesen and Paul. F. Goldsmith and H. Gupta and C{\'e}cile Gry and Patrick Hennebelle and Pierre Hily-Blant and Christine Joblin and Maja Kaźmierczak and Robert Kołos and J. Krełowski and Jes{\'u}s Mart{\'i}n-Pintado and Raquel Rodriguez Monje and Bhaswati Mookerjea and M. P'erault and Carina M. Persson and Rene Plume and Paul B. Rimmer and Morvan C. Salez and M. R. Schmidt and David Teyssier and Charlotte Vastel and Shanshan Yu and Alessandra Contursi and Karl M. Menten and Thomas R. Geballe and Stephan Schlemmer and Russell F. Shipman and A. Tielens and Sabine Philipp-May and Alain Cros and Jonas Zmuidzinas and Lorene A. Samoska and K Klein and David A. Neufeld and A. Lorenzani and J{\"u}rgen Stutzki},
  journal={Astronomy and Astrophysics},
  year={2010},
  volume={518},
  pages={1-5}
}
We report the detection of absorption lines by the reactive ions OH + ,H 2O + 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… 

Figures and Tables from this paper

Herschel/HIFI observations of interstellar OH+ and H2O+ towards W49N: a probe of diffuse clouds with a small molecular fraction

We report the detection of absorption by interstellar hydroxyl cations and water cations, along the sight-line to the bright continuum source W49N. We have used Herschel's HIFI instrument, in dual

Interstellar CH absorption in the diffuse interstellar medium along the sight-lines to G10.6-0.4 (W31C), W49N, and W51

We report the detection of the ground state N, J = 1, 3/2 → 1, 1/2 doublet of the methylidyne radical CH at ∼532 GHz and ∼536 GHz with the Herschel/HIFI instrument along the sight-line to the massive

HERSCHEL SURVEY OF GALACTIC OH+, H2O+, AND H3O+: PROBING THE MOLECULAR HYDROGEN FRACTION AND COSMIC-RAY IONIZATION RATE

In diffuse interstellar clouds the chemistry that leads to the formation of the oxygen-bearing ions OH+, H2O+, and H3O+ begins with the ionization of atomic hydrogen by cosmic rays, and continues

Spatially extended OH + emission from the Orion Bar and Ridge. ⋆

Context. The reactive HnO+ ions (OH+, H2O+ and H3O+) are widespread in the interstellar medium and act as precursors to the H2O molecule. While HnO+ absorption is seen on many Galactic lines of

Detection of OH+ and H2O+ towards Orion KL

We report observations of the reactive molecular ions OH+, H2O+, and H3O+ towards Orion KL with Herschel/HIFI. All three N = 1-0 fine-structure transitions of OH+ at 909, 971, and 1033 GHz and both

Nitrogen hydrides in interstellar gas - Herschel/HIFI observations towards G10.6-0.4 (W31C)

The HIFI instrument on board the Herschel Space Observatory has been used to observe interstellar nitrogen hydrides along the sight-line towards G10.6−0.4 in order to improve our understanding of the

Herschel/HIFI Discovery of HCL^+ in the Interstellar Medium

The radical ion HCl+, a key intermediate in the chlorine chemistry of the interstellar gas, has been identified for the first time in the interstellar medium with the Herschel Space Observatory's

THE CHEMISTRY OF INTERSTELLAR OH+, H2O+, AND H3O+: INFERRING THE COSMIC-RAY IONIZATION RATES FROM OBSERVATIONS OF MOLECULAR IONS

We model the production of OH+, H2O+, and H3O+ in interstellar clouds, using a steady-state photodissociation region code that treats the freezeout of gas species, grain surface chemistry, and

H3O+ line emission from starbursts and AGNs

Context. The H3O+ molecule probes the chemistry and the ionization rate of dense circumnuclear gas in galaxies. Aims. We use the H3O+ molecule to investigate the impact of starburst and AGN activity

DETECTION OF OH+ IN TRANSLUCENT INTERSTELLAR CLOUDS: NEW ELECTRONIC TRANSITIONS AND PROBING THE PRIMARY COSMIC RAY IONIZATION RATE

We present the detection of rotationally resolved electronic transitions in the OH+ A3Π–X3Σ− (0, 0) and (1, 0) bands toward CD-32 4348, HD 63804, HD 78344, and HD 80077. These four translucent clouds
...

References

SHOWING 1-10 OF 26 REFERENCES

Strong absorption by interstellar hydrogen fluoride: Herschel/HIFI observations of the sight-line to G10.6-0.4 (W31C)

We report the detection of strong absorption by interstellar hydrogen fluoride along the sight-line to the submillimeter continuum source G10.6-0.4 (W31C). We have used Herschel's HIFI instrument, in

H3+ in Diffuse Interstellar Clouds: A Tracer for the Cosmic-Ray Ionization Rate

Using high-resolution infrared spectroscopy we have surveyed twenty sight lines for H3+ absorption. H3+ is detected in eight diffuse cloud sight lines with column densities varying from 0.6 × 1014 to

The connection between W31, SGR 1806-20, and LBV 1806-20: Distance, extinction, and structure

We present new millimeter and infrared spectroscopic observations towards the radio nebula G10.0−0.3, which is powered by the wind of the Luminous Blue Variable star LBV 1806−20 also closely

First Detection of 13CH+ (J = 1-0)

We report the probable detection of the 13CH+ (1-0) line in absorption against the dust continuum emission of a bright star-forming region, G10.6-0.4. If the 13CH+ line velocity centroid is that of

TERAHERTZ SPECTROSCOPY AND GLOBAL ANALYSIS OF H3O+

Eight ground-state inversion transitions of H3O+ in the 0.9–1.6 THz region have been measured using the frequency multiplier submillimeter spectrometer at Jet Propulsion Laboratory. The accuracy of

The Molecular Accretion Flow in G10.6–0.4

We have observed the ultracompact H II region G10.6-0.4 with the VLA in the 23 GHz continuum and the NH3 (3, 3) inversion line. By analyzing the optical depth of the line as well as the kinematics,

The Herschel-Heterodyne Instrument for the Far-Infrared (HIFI)

  • T. de GraauwE. Caux K. Wildeman
  • Physics
    Infrared and Millimeter Waves, Conference Digest of the 2004 Joint 29th International Conference on 2004 and 12th International Conference on Terahertz Electronics, 2004.
  • 2004
The Heterodyne Instrument for the Far-Infrared (HIFI) is a single sky-pixel, high-resolution (>300.000), spectrometer for ESA's Herschel Space Observatory. The instrument is designed to provide a

A search for interstellar H2O+ in diffuse clouds

Searches for H/sub 2/O/sup +/ toward HD 187982, zeta Oph, o Per, and zeta Per have yielded significant upper limits for H/sub 2/O/sup +/ when compared with existing models for similar lines of sight.

Vibronic transition moments and line intensities for H2O

Observations on the Formation of Massive Stars by Accretion

Observations of the H66α recombination line from the ionized gas in the cluster of newly formed massive stars, G10.6-0.4, show that most of the continuum emission derives from the dense gas in an