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Young Stellar Objects (YSOs) in the inner Galactic region $10^0 < l < 15^0$and $-1^0 < b < 1^0$ are studied using GLIMPSE images and GLIMPSE datacatalogue. A total number of 1107 Class I and 1566 Class II sources areidentified in this Galactic region. With the help of GLIMPSE 5.8 $\mu$m & 8$\mu$m images, we have identified the presence of 10 major star forming sitesin the Galactic midplane, of which 8 of them are filamentary while 2 arepossible clusters of Class I $&$ II sources. The length of the identifiedfilaments are estimated as 8'-33' ($\sim$ 9 - 56 pc). Occurrence ofHub-Filamentary System (HFS) is observed in many filamentary star formingsites. Most of the Class I sources are found to be aligned along the length ofthese filamentary structures, while Class II sources have a randomdistribution. Mass and age distribution of 425 Class I and 241 Class II sourcesassociated with filaments & clusters are studied through their SED analysis.Most of the Class I sources detected have mass $>$ 8M$_\odot$, while Class IIsources have relatively low mass regime. Class I sources have ages $\le$ 0.5Myr, while Class II sources have ages in the range $\sim$0.1 - 3 Myr. Alongwith the help of high mass star forming tracers, we demonstrate that the 10regions studied here are forming a large number of high-mass stars.

Study of young stellar objects and associated filamentary structures in the inner Galaxy