Revealing the environs of the remarkable southern hot core G 327 . 3 – 0 . 6
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چکیده
Aims. We present a submm study of the massive hot core G327.3–0.6 that constrains its physical parameters and environment. Methods. The APEX telescope was used to image CO and N2H + emission, to observe lines from other molecules toward a hot and a cold molecular core, and to measure the continuum flux density of the hot core. Results. In the C 18 O J = 3 − 2 line, two clumps were found, one associated with the Hii region G327.3–0.5 and the other associated with the hot core. An additional cold clump is found 30 ′′ (0.4 pc) northeast of the hot core in bright N2H + emission. From the the continuum data, we calculate a mass of 420 M⊙ and a size of 0.1 pc for the hot core. A new, more accurate position of the hot core is reported, which allows the association of the core with a bright mid-infrared source. The luminosity of the hot core is estimated to be between 5 and 15 × 10 4 L⊙. Conclusions. This study revealed several different evolutionary stages of massive star formation in the G327.3–0.6 region.
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تاریخ انتشار 2008