J = 4-3 HCN observations of M17 SW, DR 21/OH/, W51 and NGC 6334

Bibcode
1982MNRAS.199..375W
White, G. J.; Phillips, J. P.; Beckman, J. E.; Cronin, N. J.
Referencia bibliográfica

Monthly Notices of the Royal Astronomical Society, vol. 199, Apr. 1982, p. 375-383. Research supported by the Science Research Council.

Fecha de publicación:
4
1982
Revista
Monthly Notices of the Royal Astronomical Society
Número de autores
4
Número de autores del IAC
0
Número de citas
14
Número de citas referidas
14
Descripción
We report observations of NGC 6334N, Ml7 5W, W 51 and DR2l(OH) in the J = 4→3 transition of HCN at 354GHz. These results are combined with previously obtained J=1→0HCN data to determine molecular abundances X(HCN) ˜4 × 10-11 -4 × 10-12, and characteristic line excitation zone densities n(H2)˜106 cm-3. These results are at variance with previous analyses based on J=1→0 results alone, and the predictions of certain models of the cloud chemistry. The reasons for these discrepancies are discussed.
Tipo
Con árbitro
Nubes moleculares
Modelos astronómicos
Cosmoquímica

Te puede interesar

  • Con árbitro
    Stellar halo density with LAMOST K and M giants

    Aims: We derive the morphology of the stellar component in the outer halo volume, and search for possible overdensities due to substructures therein. Methods: We made use of some of the data releases of the spectroscopic survey LAMOST DR8-DR9 in tandem with distance determinations for two subsamples, that is, of K-giants and M-giants, respectively

    López-Corredoira, M. et al.

    Fecha de publicación:

    4
    2024
    Bibcode
    2024A&A...684A.135L
    Número de citas
    1
  • Con árbitro
    Euclid preparation. XXXVI. Modelling the weak lensing angular power spectrum

    This work considers which higher order modeling effects on the cosmic shear angular power spectra must be taken into account for Euclid. We identified the relevant terms and quantified their individual and cumulative impact on the cosmological parameter inferences from Euclid. We computed the values of these higher order effects using analytic

    Euclid Collaboration et al.

    Fecha de publicación:

    4
    2024
    Bibcode
    2024A&A...684A.138E
    Número de citas
    4
  • Con árbitro
    The discovery space of ELT-ANDES. Stars and stellar populations

    The ArmazoNes high Dispersion Echelle Spectrograph (ANDES) is the optical and near-infrared high-resolution echelle spectrograph envisioned for the Extremely Large Telescope (ELT). We present a selection of science cases, supported by new calculations and simulations, where ANDES could enable major advances in the fields of stars and stellar

    Roederer, Ian U. et al.

    Fecha de publicación:

    4
    2024
    Bibcode
    2024ExA....57...17R
    Número de citas
    0