Abstract Details

Name: Prasanta Kumar Nayak
Affiliation: Tata Institute of Fundamental Research, Mumbai
Conference ID: ASI2021_514
Title : A study of UV properties of T Tauri stars with UVIT/AstroSat
Authors and Co-Authors : P. K. Nayak, Tata Institute of Fundamental Research, Mumbai, India M. Puravankara, Tata Institute of Fundamental Research, Mumbai, India M. Narang, Tata Institute of Fundamental Research, Mumbai, India
Abstract Type : Poster
Abstract Category : Stars, ISM and Galaxy
Abstract : T Tauri stars (TTS) are low-mass pre-main-sequence (PMS) stars. Accreting TTS are known as Classical TTS (CTTS) and are characterized by strong H-alpha line emission and significant excess emission in the UV and IR over photospheric values, whereas non-accreting disk-less TTS are called as weak-lines TTS (WTTS) as they show weak H-alpha emission. Emission from strong accretion shocks are thought to be the reason for the UV excess in CTTS, whereas comparatively low UV excess in WTTS is due to chromospheric activity. Though there have been many studies on TTS in optical and IR regions, their UV properties are relatively less studied despite the importance of UV photons in disk heating and influencing gas chemistry within the disk. We will present preliminary results from multiband UVIT observations of young TTS and discuss what the UV properties of young stars can tell us about accretion and disk evolution.