Abstract Details

Name: Manish Chauhan
Affiliation: Indian Institute of Space Science and Technology, Thiruvananthapuram
Conference ID: ASI2020_227
Title : Jet-bearing YSOs in Vulpecula OB association
Authors and Co-Authors : Manish Chauhan (IIST,Thiruvananthapuram), Dr. Manash Samal (PRL, Ahmedabad), Dr. Anandmayee Tej (IIST, Thiruvananthapuram)
Abstract Type : Poster
Abstract Category : Stars, ISM and Galaxy
Abstract : Jets and outflows are one of the first signposts of stellar birth. Yet, we do not understand the launching mechanisms of the jets, factors affecting jets properties, and their role in the growth of protostars. H2 1-0S(1) line emission at 2.122μm is a powerful tracer of shock excited regions associated with protostellar jets & outflows. We present an analysis of the Vulpecula OB association, for jet-bearing YSOs using data from the UKIRT Widefield Infrared Survey for H2 (UWISH2), covering a total of 8 square degrees. We have found 40 individual jets/knots in the complex. We identified driving source candidates of the jets/knots and found that most of them are protostars. We measured the outflow properties such as length, luminosity, and ejected mass and fit radiative transfer models to obtain the physical properties of the driving sources. We found that outflows of our sample are mostly driven by moderate-mass YSOs that are still actively accreting from their protoplanetary disc. We discuss various relations between YSOs and outflows such as the correlation between mass-accretion and mass-ejection rates, evolutionary status and outflows luminosity/length, etc. Based on the spatial distribution of jets, we discuss several interesting star-forming sites which are excellent targets for follow-up studies, including a site of possible triggered star formation.