Gaitee Hussain (ESO)

Stellar magnetic activity in young Suns
When Nov 09, 2017 from 02:30 PM to 03:30 PM
What
  • Colloquium
Where SH Lecture Hall
Add event to calendar vCal / iCal

T Tauri stars are young (~Myr) pre-main sequence solar-type stars that show signatures of strong magnetic activity from the radio to X-ray wavelengths. T Tauri stars are at a critical point in their pre-main sequence evolution, with many of them still accreting from substantial circumstellar disks - in which planets are presumably forming. Large-scale stellar magnetic fields play an important role in channelling accretion from their disks.

Over the last decade we have catalogued the range of magnetic field topologies found in PMS stars and have been assessing their impact on their accretion states via both observational and theoretical means. In this talk I will review our current understanding about large scale fields in T Tauri stars, showing how their topologies vary as accretion switches off. I will conclude by demonstrating how these same surface mapping techniques can be used to detect and study close-in planets around young PMS stars that have stopped accreting.