96 datasets found

Discipline: Interstellar medium Keywords: atomic physics

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  • SiO production in interstellar shocks

    We study the production of SiO in the gas phase of molecular outflows, through the sputtering of Si-bearing material in grains. The sputtering is driven by neutral particle...
  • Ortho:para-H2 ratio in C and J shocks

    Tables 2a-f and 4a-f contain an extensive set of parameters derived from our grid of C-type (tables 2a-f) and J-type (tables 4a-f) planar stationary shock models. Models of...
  • 17OH spin-rotation transition frequencies

    The frequencies and line strengths of the ^2^{Pi}3/2 J=5/2-3/2 rotational transition of ^17^OH have been calculated from an analysis of its far-infrared laser magnetic resonance...
  • C_5_H_2_ Radiatively allowed transitions

    Laboratory detection of four isomers of C_5_H_2_ molecule have been reported by Travers et al. (1997ApJ...483L.135T), McCarthy et al. (1997, Science, 275, 518), and Gottlieb et...
  • Rest frequencies of methanol maser lines

    We report accurate laboratory measurements of selected methanol transition frequencies between 0.834 and 230GHz in order to facilitate astronomical velocity analyses. New data...
  • Rest frequencies of sub-mm spectrum of SiN

    The submillimetre-wave spectrum of the SiN radical has been investigated in the laboratory using a source-modulation microwave spectrometer equipped with a negative glow...
  • Oxygen recombination lines from Cas A knots

    Fast-moving knots (FMK) in the Galactic supernova remnant Cassiopeia A consist mainly of metals and allow us to study element production in supernovae and to investigate shock...
  • Rotational spectrum of HCOO^13^CH_3_

    Laboratory measurements and analysis of the microwave and millimeter-wave spectra of potential interstellar molecules are a prerequisite for their subsequent identification by...
  • Collisional excitation of sulfur dioxide

    We present collisional rate coefficients for SO_2_ with ortho and para molecular hydrogen for the physical conditions prevailing in dark molecular clouds. Rate coefficients for...
  • Submm spectrum of deuterated glycolaldehydes

    Glycolaldehyde, a sugar-related interstellar prebiotic molecule, has recently been detected in two star-forming regions, Sgr B2(N) and G31.41+0.31. The detection of this new...
  • Submillimeter spectrum of HCOOCD_2_H

    Astronomical surveys of interstellar molecules, such as those that will be available with the very sensitive ALMA telescope, require preliminary laboratory investigations of the...
  • (Sub)mm spectrum of deuterated methyl cyanides

    The study of deuterated abundant molecules is recognized as important in understanding molecular complexity in star-forming regions. We seek to assign the laboratory millimeter...
  • ^14^N/^15^N isotopic ratio in L1544

    Samples of pristine solar system material found in meteorites and interplanetary dust particles are highly enriched in ^15^N. Conspicuous nitrogen isotopic anomalies have also...
  • Microwave spectrum of 2-pentynenitrile (C2H5CCCN)

    New radiotelescopes, such as the very sensitive ALMA, will enable the detection of interstellar molecules in much lower concentrations than previously possible. A successful...
  • Rotational spectrum of MAAN (CH_2_NCH_2_CN)

    Aminoacetonitrile has been detected in the interstellar medium and the Strecker-type synthesis is considered as one of its possible mechanisms of formation in this medium....
  • THz spectrum of methylamine

    Methylamine (CH_3_NH_2_) is the simplest primary alkylamine and has been detected in the interstellar medium. The molecule is relatively light, with the 50K Boltzmann peak...
  • HCOO^13^CH_3_ rotational spectrum

    An astronomical survey of interstellar molecular clouds needs a previous analysis of the spectra in the microwave and sub-mm energy range of organic molecules to be able to...
  • Vibrationally excited vinyl cyanide in Orion-KL

    Laboratory characterization (18-1893 GHz) and astronomical detection (IRAM-30m: 80-280GHz, Orion-KL) of CH_2_CHCN (vinyl cyanide) in its ground and vibrationally excited states....
  • Rotational spectrum of ^13^C methylamine

    Methylamine (CH_3_NH_2_) is a light molecule of astrophysical interest, which has an intensive rotational spectrum that extends in the submillimeter wave range and far beyond,...
  • Warm ISM in the Sagittarius A Complex

    We investigate the spatial and spectral distribution of the local standard of rest (LSR) velocity resolved submillimetre emission from the warm (25-90K) gas in the Sgr A...
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