Abstract Details
| Name: ekta sharma Affiliation: IIA, Bengaluru Conference ID: ASI2019_422 Title : Molecular filament formation and filament-hub interaction: LDN 1172/1174 dark nebula Authors and Co-Authors : Maheswar Gopinathan, Chang Won Lee, Shinyoung Kim, Archana Soam Abstract Type : Oral Abstract Category : Stars, ISM and Galaxy Abstract : The LDN 1172/1174 complex represents a cometary shaped hub-filament morphology containing a number of clumps all along the filament and towards hub around HD 200775. NGC 7023 is a well known reflection nebula in LDN 1174 which is illuminated by an intermediate mass Herbig Be (B3) star HD 200775, in the Cepheus constellation at a distance of ∼ 340 pc. These clumps in the filaments might collapse into stars depending on the interplay of magnetic field, gravity and turbulence. The studies on the origin of filaments pose a crucial step in deciding the evolution of these clumps. Being relatively isolated star forming region, L1172/L1174 gives us an opportunity to get a glimpse of filament formation. We have made magnetic field maps of the cloud using polarization measurements using Aries Imaging Polarimeter (AIMPOL), ARIES of background stars projected on the cloud. To understand the dynamics of filament and its relation with magnetic structures on the periphery of cloud, kinematical studies over the whole filament have been conducted using molecular line observations of 12CO, C18O, N2H+(1-0) and CS (2-1) that trace different density regimes of the clouds. The 14-m single dish telescope at Taeduk Radio Astronomical Observatory (TRAO), KASI Korea have been used to complete molecular line spectroscopy of the cloud. In this talk, I will discuss the kinematics of this particular filament with respect to the magnetic field orientation at the outer periphery of the cloud. |