Bayesian MCMC decomposition of the G339.884-1.259 methanol maser spectrum identifies seven velocity components and statistically prefers the Voigt profile over Gaussian or Lorentzian based on AIC, BIC, RMSE, and R².
Continuum emission associated with 6.7-GHz methanol masers
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abstract
We have used the Australia Telescope Compact Array (ATCA) to search for continuum emission toward three strong 6.7-GHz methanol maser sources. For two of the sources, G339.88-1.26 and NGC 6334F (G351.42+0.64), we detect continuum emission closely associated with the methanol masers. A further three clusters of masers showed no radio continuum emission above our sensitivity limit of 1-5 mJy. We find the position of the 6.7-GHz methanol masers in G339.88-1.26 to be consistent with the hypothesis that the masers lie in the circumstellar disc surrounding a massive star. We also argue that one of the clusters of methanol masers in NGC 6334F provides indirect observational support for the circumstellar disc hypothesis.
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Bayesian estimation of spectral parameters of the 6.7-GHz methanol maser G339.884-1.259 from GRAO observations
Bayesian MCMC decomposition of the G339.884-1.259 methanol maser spectrum identifies seven velocity components and statistically prefers the Voigt profile over Gaussian or Lorentzian based on AIC, BIC, RMSE, and R².