Open AccessClassical T Tauri stars: accretion, wind, dust
Author(s) -
П. П. Петров
Publication year - 2021
Publication title -
acta astrophysica taurica
Language(s) - English
Resource type - Journals
ISSN - 2712-925X
DOI - 10.31059/aat.vol2.iss1.pp1-8
Subject(s) - physics , accretion (finance) , t tauri star , astrophysics , stars , accretion disc , astronomy , observatory
Classical T Tauri stars (CTTS) are at the early evolutionary stage when the processes of planet formation take place in the surrounding accretion disks. Most of the observed activity in CTTS is due to magnetospheric accretion and wind flows. Observations of the accreting gas flows and appearance of the line-dependent veiling of the photospheric spectrum in CTTS are considered. Evidence for the dusty wind causing the observed irregular variability of CTTS is presented. Photometric and spectroscopic monitoring of two CTTS, RY Tau and SU Aur, has been carried out atthe Crimean Astrophysical Observatory since 2013 aimed at studying the dynamics of accretion and wind flows on time scales from days to years. The observed variations in the dynamical parameters may be caused by changes in the accretion rate and in the global magnetic fields of CTTS.