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We present {\it Spitzer} IRAC mid-infrared photometry on the massive starforming region AFGL 437 (IRAS 03035+5819). From the IRAC colour-colour diagram,we identify several new embedded YSOs within 64 arcsec of the central compactcluster. Using the IRAC ratio images, we investigate the molecular outflowsassociated with the highly embedded young stellar object WK34 in the centralcluster. We attribute the lobes seen (extended to $\sim$ 0.16 pc in the north)in the ratio map to shocked molecular hydrogen emission. IRAC images reveal alarge diffuse nebulosity associated with the central cluster and extending upto $\sim$ 8.0 pc from south-west to north-east direction with its brightnessgradually increasing from 3.6 to 8.0 $\mu$m. A dense box-car-shaped nebula(more than 2.0 pc in size) situated to the south-west of the cluster showsmolecular hydrogen emission that may have been caused by shock waves from thecompact cluster sources. It seems that these sources are also responsible forthe infrared-bright nebulosity. Using a 2D radiative transfer model, we derivefrom the spectral energy distributions, the mass, age and luminosity of all theYSOs identified within the central cluster. The SED modelling shows that thedriving engine of the outflows, WK34, appears to be massive but very young anddeeply embedded. The weighted mean values of the masses and ages of the 21 YSOsderived from the model are in the range 1-10 \msun and 10$^{4.1 - 6.4}$ yrrespectively; while their luminosities are in the range of 10$^{0.47-3.48}$L$_{\odot}$.

Spitzer IRAC imaging photometric study of the massive star forming region AFGL 437