| 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. |
