| Name: Arpan Ghosh Affiliation: Aryabhatta Research Institute of Observational Sciences Conference ID: ASI2023_444 Title : Spectroscopy of eruptive young variables using TANSPEC Authors and Co-Authors : Arpan Ghosh Saurabh Sharma Joe P. Ninan Devendra K. Ojha A. S. Gour Rakesh Pandey Tirthendu Sinha Koshvendra Singh Aayushi Verma Supriyo Ghosh Harmeen Kaur Abstract Type : Oral Abstract Category : Stars, ISM and Galaxy Abstract : In recent times, 3.6m Devasthal Optical Telescope (DOT) has installed an optical to near infra-red spectrograph, TANSPEC, which provides spectral coverage from 0.55- 2.5 microns. Using TANSPEC, we have obtained a single epoch spectrum of 9 young eruptive variables that are categorised as FUors and EXors. We have analysed line profiles of the sources and compared with the previously published spectra of these objects. Comparing the line profile shapes with the existing theoretical predictions, we have tried to understand the physical processes that are responsible for the current disc evolution and the present accretion dynamics. Our study has shown the importance for time evolved spectroscopic studies for better understanding the evolution of the accretion mechanisms which in turn can help in better categorisation of the young stars displaying episodic accretion behaviour. |