The distribution of the warm and dense molecular gas around Cepheus A HW 2

@inproceedings{Torrelles1999TheDO,
  title={The distribution of the warm and dense molecular gas around Cepheus A HW 2},
  author={Jose Maria Torrelles and Jos{\'e} Francisco Flores G{\'o}mez and Guido Alejandro Garay and Luis Felipe Garc{\'i}a-Calvo Rodr{\'i}guez and Luis Fernando Miranda and Salvador Curiel and Paul T.-P. Ho},
  year={1999}
}
We present VLA observations of the (J, K)=(1, 1), (2, 2), (3, 3) and (4, 4) inversion transitions of NH3 toward the HW 2 object in Cepheus A, with 1-arcsec angular resolution. Emission is detected in the main hyperfine line of the first three transitions. The NH3(2, 2) emission shows a non-uniform ‘ring’ structure, which is more extended (3 arcsec) and intense than the emission seen in the (1, 1) and (3, 3) lines. A rotational temperature of ∼ 30–50 K and a lower limit to the mass of ∼ 1 (XNH3… CONTINUE READING

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