Properties of CVSO 30 from TESS measurements: probably a binary T Tauri star with complex light curves and no obvious planets
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Date
2020
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Oxford University Press
Abstract
‘Transiting Exoplanet Survey Satellite’ (TESS) photometry of CVSO 30 spanned 21.8 d, with a single large gap of 1.1 d. This allows alias-free determination of the two periodicities in the data. It is confirmed that both of these are non-sinusoidal: the dominant P1 = 0.4990 d has two detectable harmonics and P2 = 0.4486 d has seven. The large number of harmonics in the second periodicity characterizes a very complex light curve shape. One of the features in the light curve is a sharp dip of duration ∼2 h: this is probably the source of the previously claimed planetary transit signature. The star is a member of a small group of T Tauri stars with complex light curves, which have recently been exhaustively studied using Kepler and TESS observations. The two non-commensurate periods are most simply interpreted as being from two stars, i.e. CVSO 30 is probably a binary.
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Keywords
Stars: individual: CVSO 30, Stars: variables: T Tauri 1 INTRODUCTION, Stellar rotation period, Sinusoidal
Citation
Koen, C. (2020). Properties of CVSO 30 from TESS measurements: probably a binary T Tauri star with complex light curves and no obvious planets. Monthly Notices of the Royal Astronomical Society, 494(3), 4349–4356