The GRAVITY young stellar object survey XIV : Investigating the magnetospheric accretion-ejection processes in S CrA N
Abstract
The dust- and gas-rich protoplanetary disks around young stellar systems play a key role in star and planet formation. While considerable progress has recently been made in probing these disks on large scales of a few tens of astronomical units (au), the central au needs to be more investigated. We aim at unveiling the physical processes at play in the innermost regions of the strongly accreting T Tauri Star S CrA N by means of near-infrared interferometric observations. The K-band continuum emission is well reproduced with an azimuthally-modulated dusty ring. As the star alone cannot explain the size of this sublimation front, we propose that magnetospheric accretion is an important dust-heating mechanism leading to this continuum emission. The differential analysis of the Hydrogen Br line is in agreement with radiative transfer models combining magnetospheric accretion and disk winds. Our observations support an origin of the Br line from a combination of (variable) accretion-ejection processes in the inner disk region.
Keywords
Cite
@article{arxiv.2408.02374,
title = {The GRAVITY young stellar object survey XIV : Investigating the magnetospheric accretion-ejection processes in S CrA N},
author = {GRAVITY Collaboration and H. Nowacki and K. Perraut and L. Labadie and J. Bouvier and C. Dougados and M. Benisty and J. A. Wojtczak and A. Soulain and E. Alecian and W. Brandner and A. Caratti o Garatti and R. Garcia Lopez and V. Ganci and J. Sánchez-Bermúdez and J. -P. Berger and G. Bourdarot and P. Caselli and Y. Clénet and R. Davies and A. Drescher and A. Eckart and F. Eisenhauer and M. Fabricius and H. Feuchtgruber and N. M. Förster-Schreiber and P. Garcia and E. Gendron and R. Genzel and S. Gillessen and S. Grant and T. Henning and L. Jocou and P. Kervella and N. Kurtovic and S. Lacour and V. Lapeyrère and J. -B. Le Bouquin and D. Lutz and F. Mang and T. Ott and T. Paumard and G. Perrin and S. Rabien and D. Ribeiro and M. Sadun Bordoni and S. Scheithauer and J. Shangguan and T. Shimizu and S. Spezzano and C. Straubmeier and E. Sturm and L. Tacconi and E. van Dishoeck and F. Vincent and F. Widmann},
journal= {arXiv preprint arXiv:2408.02374},
year = {2024}
}