Radiative transfer in silylidene molecule

Abstract

In order to search for silylidene (H 2 CSi) in the interstellar medium, Izuha et al. (1996) recorded microwave spectrum of H 2 CSi in laboratory and made an unsuccessful attempt of its identification in IRC +10216, Ori KL, Sgr B2, through its 7 17 − 6 16 transition at 222.055 GHz. For finding out if there are other transitions of H 2 CSi which may help in its identification in the interstellar medium, we have considered 25 rotational levels of ortho-H 2 CSi connected by collisional transitions and 35 radiative transitions, and solved radiative transfer problem using the LVG approximation. We have found that the brightness temperatures of 9 transitions are larger than that of 7 17 − 6 16 transition. Thus, these transitions may help in detection of H 2 CSi in the interstellar medium.

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“…Finally, by using these values of α and β at each position, the HF (reference energy) and the energy of correlations, and finally the total energy, corresponding to n=∞, can be calculated, and very accurate PES can be generated. [19][20][21][22][23] Copyright:…”