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We present the initial results of our investigation of the star-formingcomplex W49, one of the youngest and most luminous massive star forming regionsin our Galaxy. We used Spitzer/Infrared Array Camera (IRAC) data to investigatemassive star formation with the primary objective to locate a representativeset of protostars and the clusters of young stars that are forming around them.We present our source catalog with the mosaics from the IRAC data. In thisstudy we used a combination of IRAC, MIPS, Two Micron All Sky Survey (2MASS)and UKIRT Deep Infrared Sky Survey (UKIDSS) data to identify and classify theYoung Stellar Objects (YSOs). We identified 232 Class 0/I YSOs, 907 Class IIYSOs, and 74 transition disk candidate objects using color-color andcolor-magnitude diagrams. In addition, to understand the evolution of starformation in W49 we analysed the distribution of YSOs in the region to identifyclusters using a minimal spanning tree method. The fraction of YSOs that belongto clusters with >7 members is found to be 52% for a cut-off distance of 96"and the ratio of Class II/I objects is 2.1. We compared the W49 region to theG305 and G333 star forming regions and concluded that the W49 has the richestpopulation with 7 subclusters of YSOs.

Young Stellar Objects in the Massive Star Forming Region W49