Study of the dense molecular gas surrounding the 'extended green object' G35.03+0.35
We present the results of a new study of the molecular gas associated with the 'extended green object' (EGO) G35.03+0.35. This object, very likely a massive young stellar object, is embedded in a molecular cloud at the border of an Hii region. The observations were performed with the Ataca...
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| Autores principales: | , , , , , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_00358711_v419_n3_p2206_Paron |
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| Sumario: | We present the results of a new study of the molecular gas associated with the 'extended green object' (EGO) G35.03+0.35. This object, very likely a massive young stellar object, is embedded in a molecular cloud at the border of an Hii region. The observations were performed with the Atacama Submillimeter Telescope Experiment in the 12CO and 13CO J= 3-2, HCO +J= 4-3 and CS J= 7-6 lines with an angular resolution of about 22arcsec. From the 12CO J= 3-2 line, we discovered outflowing activity of the massive young stellar object. We obtained a total mass and kinetic energy for the outflows of 30 and 3000M ⊙ (kms -1) 2 (6 × 10 46 erg), respectively. We discovered an HCO + and CS clump towards the EGO G35.03+0.35. The detection of these molecular species supports the presence of molecular outflows and a dense molecular envelope with temperatures and densities above 40K and 6 × 10 6cm -3, respectively. Using public near- and mid-infrared and submillimetre data, we investigated the spectral energy distribution confirming that EGO G35.03+0.35 is a massive young stellar object at its earliest evolutionary stage (i.e. a class I young stellar object). By analysing radio-continuum archival data, we found three radio sources towards the object, suggesting the presence of several young stellar objects in the region. Our radio-continuum analysis is consistent with the presence of at least one ultracompact Hii region and a hypercompact Hii region or a constant-velocity ionized wind source. © 2011 The Authors Monthly Notices of the Royal Astronomical Society © 2011 RAS. |
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