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The GRAVITY young stellar object survey XIV : Investigating the magnetospheric accretion-ejection processes in S CrA N

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Main Authors:	GRAVITY Collaboration, Nowacki, H., Perraut, K., Labadie, L., Bouvier, J., Dougados, C., Benisty, M., Wojtczak, J. A., Soulain, A., Alecian, E., Brandner, W., Garatti, A. Caratti o, Lopez, R. Garcia, Ganci, V., Sánchez-Bermúdez, J., Berger, J. -P., Bourdarot, G., Caselli, P., Clénet, Y., Davies, R., Drescher, A., Eckart, A., Eisenhauer, F., Fabricius, M., Feuchtgruber, H., Förster-Schreiber, N. M., Garcia, P., Gendron, E., Genzel, R., Gillessen, S., Grant, S., Henning, T., Jocou, L., Kervella, P., Kurtovic, N., Lacour, S., Lapeyrère, V., Bouquin, J. -B. Le, Lutz, D., Mang, F., Ott, T., Paumard, T., Perrin, G., Rabien, S., Ribeiro, D., Bordoni, M. Sadun, Scheithauer, S., Shangguan, J., Shimizu, T., Spezzano, S., Straubmeier, C., Sturm, E., Tacconi, L., van Dishoeck, E., Vincent, F., Widmann, F.
Format:	Preprint
Published:	2024
Subjects:	Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics of Galaxies
Online Access:	Acceder al recurso
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author	GRAVITY Collaboration Nowacki, H. Perraut, K. Labadie, L. Bouvier, J. Dougados, C. Benisty, M. Wojtczak, J. A. Soulain, A. Alecian, E. Brandner, W. Garatti, A. Caratti o Lopez, R. Garcia Ganci, V. Sánchez-Bermúdez, J. Berger, J. -P. Bourdarot, G. Caselli, P. Clénet, Y. Davies, R. Drescher, A. Eckart, A. Eisenhauer, F. Fabricius, M. Feuchtgruber, H. Förster-Schreiber, N. M. Garcia, P. Gendron, E. Genzel, R. Gillessen, S. Grant, S. Henning, T. Jocou, L. Kervella, P. Kurtovic, N. Lacour, S. Lapeyrère, V. Bouquin, J. -B. Le Lutz, D. Mang, F. Ott, T. Paumard, T. Perrin, G. Rabien, S. Ribeiro, D. Bordoni, M. Sadun Scheithauer, S. Shangguan, J. Shimizu, T. Spezzano, S. Straubmeier, C. Sturm, E. Tacconi, L. van Dishoeck, E. Vincent, F. Widmann, F.
author_facet	GRAVITY Collaboration Nowacki, H. Perraut, K. Labadie, L. Bouvier, J. Dougados, C. Benisty, M. Wojtczak, J. A. Soulain, A. Alecian, E. Brandner, W. Garatti, A. Caratti o Lopez, R. Garcia Ganci, V. Sánchez-Bermúdez, J. Berger, J. -P. Bourdarot, G. Caselli, P. Clénet, Y. Davies, R. Drescher, A. Eckart, A. Eisenhauer, F. Fabricius, M. Feuchtgruber, H. Förster-Schreiber, N. M. Garcia, P. Gendron, E. Genzel, R. Gillessen, S. Grant, S. Henning, T. Jocou, L. Kervella, P. Kurtovic, N. Lacour, S. Lapeyrère, V. Bouquin, J. -B. Le Lutz, D. Mang, F. Ott, T. Paumard, T. Perrin, G. Rabien, S. Ribeiro, D. Bordoni, M. Sadun Scheithauer, S. Shangguan, J. Shimizu, T. Spezzano, S. Straubmeier, C. Sturm, E. Tacconi, L. van Dishoeck, E. Vincent, F. Widmann, F.
contents	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$γ$ line is in agreement with radiative transfer models combining magnetospheric accretion and disk winds. Our observations support an origin of the Br$γ$ line from a combination of (variable) accretion-ejection processes in the inner disk region.
format	Preprint
id	arxiv_https___arxiv_org_abs_2408_02374
institution	arXiv
publishDate	2024
record_format	arxiv
spellingShingle	The GRAVITY young stellar object survey XIV : Investigating the magnetospheric accretion-ejection processes in S CrA N GRAVITY Collaboration Nowacki, H. Perraut, K. Labadie, L. Bouvier, J. Dougados, C. Benisty, M. Wojtczak, J. A. Soulain, A. Alecian, E. Brandner, W. Garatti, A. Caratti o Lopez, R. Garcia Ganci, V. Sánchez-Bermúdez, J. Berger, J. -P. Bourdarot, G. Caselli, P. Clénet, Y. Davies, R. Drescher, A. Eckart, A. Eisenhauer, F. Fabricius, M. Feuchtgruber, H. Förster-Schreiber, N. M. Garcia, P. Gendron, E. Genzel, R. Gillessen, S. Grant, S. Henning, T. Jocou, L. Kervella, P. Kurtovic, N. Lacour, S. Lapeyrère, V. Bouquin, J. -B. Le Lutz, D. Mang, F. Ott, T. Paumard, T. Perrin, G. Rabien, S. Ribeiro, D. Bordoni, M. Sadun Scheithauer, S. Shangguan, J. Shimizu, T. Spezzano, S. Straubmeier, C. Sturm, E. Tacconi, L. van Dishoeck, E. Vincent, F. Widmann, F. Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics of Galaxies 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$γ$ line is in agreement with radiative transfer models combining magnetospheric accretion and disk winds. Our observations support an origin of the Br$γ$ line from a combination of (variable) accretion-ejection processes in the inner disk region.
title	The GRAVITY young stellar object survey XIV : Investigating the magnetospheric accretion-ejection processes in S CrA N
topic	Solar and Stellar Astrophysics Earth and Planetary Astrophysics Astrophysics of Galaxies
url	https://arxiv.org/abs/2408.02374