New Magnetic Measurements of T Tauri Stars with CRIRES

Yang Hao, haoyang@phy.ccnu.edu.cn, Central China Normal University, China
Johns-Krull Christopher M., Rice University


Abstract
By analyzing the Zeeman broadening of Ti I lines in the K-band spectra from CRIRES on VLT, we present new magnetic measurements of T Tauri stars. We study the variation of magnetic fields and fluxes in the evolution of T Tauri stars and discuss the connection between strong magnetic fields and possible underproduction of X-ray emission compared to main sequence star calibrations.