We present an analysis of multi-wavelength observations of Monoceros R1 ( Mon R1 ) complex ( at d \sim 760 pc ) .
An elongated filament ( length \sim 14 pc , mass \sim 1465 M _ { \odot } ) is investigated in the complex , which is the most prominent structure in the Herschel column density map .
An analysis of the FUGIN ^ { 12 } CO ( 1–0 ) and ^ { 13 } CO ( 1–0 ) line data confirms the existence of the filament traced in a velocity range of [ - 5 , +1 ] km s ^ { -1 } .
The filament is found to host two previously known sites IC 446 and IC 447 at its opposite ends .
A massive young stellar object ( YSO ) is embedded in IC 446 , while IC 447 contains several massive B-type stars .
The Herschel temperature map reveals the extended warm dust emission ( at T _ { \mathrm { d } } \sim 15–21 K ) toward both the ends of the filament .
The Spitzer ratio map of 4.5 \mu m/3.6 \mu m emission suggests the presence of photo-dissociation regions and signature of outflow activity toward IC 446 and IC 447 .
Based on the photometric analysis of point-like sources , clusters of YSOs are traced mainly toward the filament ends .
The filament is found to be thermally supercritical showing its tendency of fragmentation , which is further confirmed by the detection of a periodic oscillatory pattern ( having a period of \sim 3–4 pc ) in the velocity profile of ^ { 13 } CO. Our outcomes suggest that the fragments distributed toward the filament ends have rapidly collapsed , and had formed the known star-forming sites .
Overall , the elongated filament in Mon R1 is a promising sample of the “ end-dominated collapse ” scenario , as discussed by Pon et al .
( 2011 , 2012 ) .