Abstract Details

Name: Sreelekshmi Mohan
Affiliation: Indian Institute of Space Science and Technology
Conference ID: ASI2021_300
Title : Radio spectra of protostellar jets : A study of thermal and non-thermal emission
Authors and Co-Authors : Sreelekshmi Mohan (Indian Institute of Space Science and Technology), Sarita Vig (Indian Institute of Space Science and Technology), Samir Mandal (Indian Institute of Space Science and Technology)
Abstract Type : Poster
Abstract Category : Stars, ISM and Galaxy
Abstract : Star formation proceeds by the accretion of mass from dense envelopes around them. The accretion progresses by the release of angular momentum, launching bipolar jets along the rotation axis. Jets serve as an important tool in the study of star forming regions which are embedded in large clouds of gas and dust. These regions can be studied well in longer wavelengths and at higher angular resolutions, making radio observations very relevant for their understanding. Radio emission from ionized jets have been detected towards a number of protostellar objects of which few exhibits negative spectral indices and polarized emission suggesting the presence of synchrotron emission from relativistic electrons. We develop a numerical model for jets, that incorporate both free-free and synchrotron emission mechanisms, comprising of an inner thermal jet, and a combination of thermal and non-thermal contributions along the edges where it interacts with the interstellar medium. We attempt to model the spectra of few well-known sources that exhibit negative spectral indices by exploring the parameter space to also understand the impact of various physical conditions within the jet on its spectrum. With the help of this model we can also constrain the physical parameters associated with these sources.