Laboratory and Astronomical Identification of the Negative Molecular Ion C6H–
- M. C. McCarthy, C. Gottlieb, H. Gupta, P. Thaddeus
- Physics, Chemistry
- 20 November 2006
The negative molecular ion C6H- has been detected in the radio band in the laboratory and has been identified in the molecular envelope of IRC +10216 and in the dense molecular cloud TMC-1. The…
HERSCHEL SURVEY OF GALACTIC OH+, H2O+, AND H3O+: PROBING THE MOLECULAR HYDROGEN FRACTION AND COSMIC-RAY IONIZATION RATE
- N. Indriolo, D. Neufeld, F. Wyrowski
- Physics
- 2 December 2014
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…
Detection of the Carbon Chain Negative Ion C8H– in TMC-1
- S. Brünken, H. Gupta, C. Gottlieb, M. C. McCarthy, P. Thaddeus
- Physics, Chemistry
- 27 June 2007
The negative molecular ion C8H- has been detected in the Galactic molecular source TMC-1. Four rotational transitions have been observed in the centimeter-wave band with the NRAO 100 m Green Bank…
Laboratory and Astronomical Detection of the Negative Molecular Ion C3N−
- P. Thaddeus, C. Gottlieb, J. Cernicharo
- Physics
- 20 April 2008
The negative molecular ion C3N− has been detected at millimeter wavelengths in a low-pressure laboratory discharge, and then with frequencies derived from the laboratory data in the molecular…
Interstellar OH+, H2O+ and H3O+ along the sight-line to G10.6–0.4
- M. Gerin, M. Luca, J. Stutzki
- Physics
- 31 May 2010
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…
HERSCHEL OBSERVATIONS OF EXTRAORDINARY SOURCES: ANALYSIS OF THE HIFI 1.2 THz WIDE SPECTRAL SURVEY TOWARD ORION KL. I. METHODS
- N. Crockett, E. Bergin, Shanshan Yu
- Physics
- 9 May 2014
We present a comprehensive analysis of a broadband spectral line survey of the Orion Kleinmann–Low nebula (Orion KL), one of the most chemically rich regions in the Galaxy, using the HIFI instrument…
A SURVEY OF C4H, C6H, AND C6H− WITH THE GREEN BANK TELESCOPE
- H. Gupta, C. Gottlieb, M. C. McCarthy, P. Thaddeus
- Physics
- 5 February 2009
A survey of the carbon chain negative ion C6H− and the structurally similar radicals C4H and C6H has been done with the 100 m Green Bank Telescope toward 24 galactic molecular sources. The most…
Rotational spectroscopy of the isotopic species of silicon monosulfide, SiS.
- H. Müller, M. McCarthy, P. Thaddeus
- PhysicsPhysical Chemistry, Chemical Physics - PCCP
- 21 March 2007
An improved set of spectroscopic parameters for SiS has been derived which include several terms describing the breakdown of the Born-Oppenheimer approximation, and highly accurate rotational frequencies for this important astronomical molecule can now be predicted well into the terahertz region.
Herschel/HIFI observations of interstellar OH+ and H2O+ towards W49N: a probe of diffuse clouds with a small molecular fraction
- D. Neufeld, J. Goicoechea, J. Zmuidzinas
- Physics
- 6 July 2010
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…
Rotational Spectra of the Carbon Chain Negative Ions C4H– and C8H–
- H. Gupta, S. Brünken, F. Tamassia, C. Gottlieb, M. McCarthy, P. Thaddeus
- Physics, Chemistry
- 11 January 2007
The rotational spectra of the butadiyne anion C4H- and the octatetrayne anion C8H- have been detected in the laboratory. Precise spectroscopic constants for these closed-shell molecules have been…
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