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Paper: Magnetic Fields in Low-Mass Stars from High-Resolution Infrared Spectroscopy
Volume: 494, Physics and Evolution of Magnetic and Related Stars
Page: 123
Authors: Shulyak, D.
Abstract: Accurate spectroscopic measurements of the magnetic fields in low mass stars remain challenging because of their cool temperatures, strong line blending, and often fast rotation. This is why previous estimates were based either on the analysis of only a few lines or made use of some indirect techniques. This frequently led to a noticeable scatter in the obtained results. In this work we will present and discuss new results on the determination of the intensity and geometry of the magnetic fields in M dwarfs and solar-type stars using the IR observations obtained with CRIRES@VLT. The instrument provides unprecedented data of high resolution (R=100 000), which is crucial for resolving individual magnetically broadened molecular and atomic lines. Such an in-depth analysis based on the direct magnetic spectral synthesis opens a possibility to measure magnetic fields avoiding most of the limitations and assumptions made in previous studies.
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