The Young Stellar Population of the metal-poor galaxy NGC 6822
  We present a comprehensive study of massive young stellar objects (YSOs) in
the metal-poor galaxy NGC 6822 using IRAC and MIPS data obtained from the {\em
Spitzer Space Telescope}. We find over 500 new YSO candidates in seven massive
star-formation regions; these sources were selected using six colour-magnitude
cuts. Via spectral energy distribution fitting to the data with YSO radiative
transfer models we refine this list, identifying 105 high-confidence and 88
medium-confidence YSO candidates. For these sources we constrain their
evolutionary state and estimate their physical properties. The majority of our
YSO candidates are massive protostars with an accreting envelope in the initial
stages of formation. We fit the mass distribution of the Stage I YSOs with a
Kroupa initial mass function and determine a global star-formation rate of
0.039 $M_{\odot} yr^{-1}$. This is higher than star-formation rate estimates
based on integrated UV fluxes. The new YSO candidates are preferentially
located in clusters which correspond to seven active high-mass star-formation
regions which are strongly correlated with the 8 and 24 $\mu$m emission from
PAHs and warm dust. This analysis reveals an embedded high-mass star-formation
region, Spitzer I, which hosts the highest number of massive YSO candidates in
NGC 6822. The properties of Spitzer I suggest it is younger and more active
than the other prominent H\,{\sc ii} and star-formation regions in the galaxy.
