Results of magnetic field measurements in young stars DO Tau, DR Tau, DS Tau

TL;DR

This study reports magnetic field measurements in hot accretion spots of three young T Tauri stars, demonstrating the feasibility of studying magnetic fields in these regions down to 13th magnitude.

Contribution

It provides new measurements of magnetic fields in the accretion zones of CTTS, including the first detection in DS Tau, expanding the understanding of stellar magnetic environments.

Findings

Magnetic fields detected in the formation regions of emission lines in all three stars.

Field strength in DS Tau's NaI D lines matches that in HeI 5876 Å.

Method allows future studies of magnetic fields in fainter CTTS.

Abstract

Results of measurements of the longitudinal magnetic field in a hot accretion spot in three classical T Tauri stars (CTTS) are presented. The magnetic field in the formation region of the narrow component of the emission line HeI 5876 {\AA} was found for each star in our sample at a level of more than 2\sigma. In case of DS Tau we have found the field in the narrow components of NaI D lines, which was equal to +0.8 \pm 0.3 kG, i.e. it was equal to the field measured on the narrow component of HeI 5876 \AA. Our results indicate that the magnetic field in the hot spots can be studied for CTTS down to 13^m that allow in the future to double a number of CTTS with measured field in the accretion zone.