| dc.description.abstract | 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 amolecular cloud at the border of anHII 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 22 arcsec. 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 (km s−1)2 (6 × 1046
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 × 106 cm−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. | |
