Abstract Details

Name: Belinda Damian
Affiliation: CHRIST (Deemed to be University)
Conference ID: ASI2021_190
Title : Testing the dependence of disk evolution on external UV radiation in W5 clusters
Authors and Co-Authors : Belinda Damian (CHRIST (Deemed to be University), Bangalore), Jessy Jose (Indian Institute of Science Education and Research (IISER), Tirupati), K. T. Paul (CHRIST (Deemed to be University), Bangalore)
Abstract Type : Poster
Abstract Category : Stars, ISM and Galaxy
Abstract : The circumstellar disks (or protoplanetary disk) are a natural by-product of the star formation process. The evolution of these disks can be attributed to the accretion of the disk gas and dust onto the star, accretion into planets, photoevaporation due to the central protostar or due to external UV radiation from nearby massive stars. Studies have shown that the evolution of disks is dependent on the stellar mass and that the disk frequencies around solar to high-mass stars are lower in comparison to the disk frequencies around low-mass stars. This correlation between the disk fraction and stellar mass indicates that the time available for planet formation around massive stars is less. Hence, it is important to understand the relation between disk fraction versus age as a function of stellar mass and the dependence of disk frequency on environmental factors. In this regard, the young clusters (age ~2Myr) IC1848-East and West located at a distance of ~2.2kpc in the W5 giant molecular cloud complex with negligible extinction (Av ~ 1.5 mag) serve as ideal targets. Using deep multiband photometry from CFHT (Megaprime), PanSTAARS, Mayall Telescope (Newfirm) and Spitzer (IRAC, MIPS) we compare the disk fraction as a function of mass and UV flux between the two clusters through SED analysis. We also study the effect of age, mass and UV flux on the disk color excess. Since the two target clusters are located at the same distance with similar age and negligible foreground extinction but experience varying amounts of external radiation from the massive stars, this comparative study can provide evidence for the role of environmental factors on disk evolution.