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Description
We present a multi-wavelength analysis of the massive star-forming region G345.50+0.35 using MeerKAT observations and high-resolution ALMA archival data to investigate the morphology, kinematics, and dynamical ages of gas and dust in this region. Ionized gas traced by free–free emission reveals three sources labelled A, B, and C with source C exhibiting a morphology indicative of triggered star formation. Dynamical age estimates for sources A, B, and C, 3.55 ± 0.17 × 10³ yr, 1.49 ± 0.075 × 10⁴ yr, and 2.80 ± 0.14 × 10⁴ yr, respectively, suggest that source C may have triggered the formation of the other two. The ALMA 1.3 mm dust continuum map identifies eleven dense cores (MM1–MM11), with MM1 being the dominant core and coincident with 6.7 GHz methanol maser emission. Molecular line observations reveal varying excitation conditions across the cores, with a bulk excitation temperature of 148.96 K and core masses ranging from 0.16 to 10 M⊙. H₂CO emission traces velocity gradients consistent with a rotating envelope around MM1 (1045 au) and a possible disk around MM4 (397 au). Bipolar outflows traced by ¹³CO emission are detected toward the MM1 core. The derived outflow properties, such as the outflow mass, momentum, energy, mass-loss rate, momentum flux and energy ejection rate of ¹³CO emission clearly indicate the presence of a massive protostar that is still undergoing accretion and driving outflows in its early evolutionary stage.
| Stream | Science or Engineering |
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