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MaTYSSE((MaTYSSE stands for: **Ma**gnetic **T**opologies of **Y**oung **S**tars & the **S**urvival of close-in massive **E**xoplanets)) is a Large observing Program carried out with the spectropolarimeters ESPaDOnS@CFHT, NARVAL@TBL and HARPS-Pol@ESO, and complemented with photometric observations. It addresses major unsolved issues regarding the formation of Sun-like stars and their planetary systems, and in particular about the strong impact of magnetic fields on these initial steps so critical for our understanding of the early life of a star like our Sun. | MaTYSSE((MaTYSSE stands for: **Ma**gnetic **T**opologies of **Y**oung **S**tars & the **S**urvival of close-in massive **E**xoplanets)) is a Large observing Program carried out with the spectropolarimeters ESPaDOnS@CFHT, NARVAL@TBL and HARPS-Pol@ESO, and complemented with photometric observations. It addresses major unsolved issues regarding the formation of Sun-like stars and their planetary systems, and in particular about the strong impact of magnetic fields on these initial steps so critical for our understanding of the early life of a star like our Sun. | ||
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More specifically, MaTYSSE aims at studying the **large-scale magnetic topologies of a sample of low-mass protostars** that have mostly dissipated their accretion disc already (called weak-line T Tauri stars / wTTSs) to investigate **how different they are from those of protostars that are still surrounded by their accretion discs** (called classical T Tauri stars / cTTSs), and from those of mature main-sequence stars; being the missing link in our knowledge of magnetic topologies of low-mass stars, wTTSs should reveal the kind of magnetospheres with which Sun-like stars initiate their unleashed spin-up as they contract towards the main-sequence. | More specifically, MaTYSSE aims at studying the **large-scale magnetic topologies of a sample of low-mass protostars** that have mostly dissipated their accretion disc already (called weak-line T Tauri stars / wTTSs) to investigate **how different they are from those of protostars that are still surrounded by their accretion discs** (called classical T Tauri stars / cTTSs), and from those of mature main-sequence stars; being the missing link in our knowledge of magnetic topologies of low-mass stars, wTTSs should reveal the kind of magnetospheres with which Sun-like stars initiate their unleashed spin-up as they contract towards the main-sequence. |