Abstract.
We analyze the distribution of the young sources and interstellar matter
in the environs of the mid-infrared (MIR) bubble coincides with the
&hii; region Sh 2-90. Our study is
based on the radio continuum mapping at 1280 MHz, along with
Spitzer-IRAC and near-infrared (NIR) data. We performed
the photometric analysis at NIR-MIR bands to assess the likely
stellar candidates with disk and envelope using colour-colour (CC)
diagrams.
The morphology suggests a 8 μm void at the center of the $hii
region. However,
we see roughly circular shell of 8 μm emission enclosing the ionized
gas
seen in 1280 MHz, indicating void is probably originated due to
the energy input from a massive source. Our study
shows that the massive star is possibly a O9-B0 type. From the
photometric
analyses, we find a group of young stellar objects (YSOs) at the border
of the bubble.
Our preliminary analysis suggets that Sh2-90 shows signature for a
possible site of triggered star formation.
Key words: stars -- formation -- pre-main-sequence: ISM -- &hii;