High-mass star formation toward southern infrared bubble S10
  An investigation in radio and infrared wavelengths of two high-mass star
forming regions toward the southern Galactic bubble S10 is presented here. The
two regions under study are associated with the broken bubble S10 and Extended
Green Object, G345.99-0.02, respectively. Radio continuum emission mapped at
610 and 1280 MHz using the Giant Metrewave Radio Telescope, India is detected
towards both the regions. These regions are estimated to be ionized by early B
to late O type stars. Spitzer GLIMPSE mid-infrared data is used to identify
young stellar objects associated with these regions. A Class I/II type source,
with an estimated mass of 6.2 M{\sun} , lies {\sim} 7{\arcsec} from the radio
peak. Pixel-wise, modified blackbody fits to the thermal dust emission using
Herschel far-infrared data is performed to construct dust temperature and
column density maps. Eight clumps are detected in the two regions using the 250
{\mu}m image. The masses and linear diameter of these range between {\sim} 300
- 1600 M{\sun} and 0.2 - 1.1 pc, respectively which qualifies them as high-mass
star forming clumps. Modelling of the spectral energy distribution of these
clumps indicates the presence of high luminosity, high accretion rate, massive
young stellar objects possibly in the accelerating accretion phase. Further,
based on the radio and MIR morphology, the occurrence of a possible bow-wave
towards the likely ionizing star is explored.
