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Laboratory and Astronomical Identification of the Negative Molecular Ion C6H
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. TheExpand
Detection of the carbon chain negative ion C8H- in TMC-1
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 BankExpand
Detection of HC[TINF]11[/TINF]N in the Cold Dust Cloud TMC-1
Two consecutive rotational transitions of the long cyanopolyyne HC11N, J=39-38, and J=38-37, have been detected in the cold dust cloud TMC-1 at the frequencies expected from recent laboratoryExpand
Isotopic fractionation of methane in the stratosphere and its effect on free tropospheric isotopic compositions
Kinetic isotope effects (KIEs) for the oxidation of CH4 by OH, Cl, and O(¹D) were incorporated into a 2D model of the atmosphere to examine how sensitive the carbon isotopic composition of CH4 in theExpand
Laboratory and Astronomical Detection of the Negative Molecular Ion C3N
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 molecularExpand
Search for anions in molecular sources: C4H - detection in L1527
Based on observations carried out with the IRAM 30 m telescope. IRAM is supported by INSU/CNRS (France), MPG (Germany) and IGN (Spain).-- Accepted for publication in Astronomy & Astrophysics Letters.
Extreme deuterium enrichment in stratospheric hydrogen and the global atmospheric budget of H2
This work estimates the D/H ratio of H2 produced from CH4 in the stratosphere, where production is isolated from the influences of non-photochemical sources and sinks, showing that the chain of reactions producing H2 fromCH4 concentrates D in the product H2. Expand
Rotational spectroscopy of the isotopic species of silicon monosulfide, SiS.
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. Expand
A spectral-line survey of IRC+10216 in the 345 GHz band has been undertaken with the Submillimeter Array. Although not yet completed, it has already yielded a fairly large sample of narrow molecularExpand
Carbon and hydrogen isotopic compositions of stratospheric methane: 2. Two-dimensional model results and implications for kinetic isotope effects
[1] New high-precision measurements of the carbon and hydrogen isotopic compositions of stratospheric CH4 made on whole air samples collected aboard the NASA ER-2 aircraft are compared with resultsExpand