{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,11]],"date-time":"2026-03-11T20:08:13Z","timestamp":1773259693183,"version":"3.50.1"},"reference-count":58,"publisher":"EDP Sciences","license":[{"start":{"date-parts":[[2024,10,3]],"date-time":"2024-10-03T00:00:00Z","timestamp":1727913600000},"content-version":"vor","delay-in-days":2,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["A&amp;A"],"accepted":{"date-parts":[[2024,8,1]]},"published-print":{"date-parts":[[2024,10]]},"abstract":"<jats:p><jats:italic>Context.<\/jats:italic> 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 requires further investigation.<\/jats:p>\n<jats:p><jats:italic>Aims.<\/jats:italic>We aim to unveil 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. As recent spectropolarimetric observations suggest that S CrA N might undergo intense ejection processes, we focus on the accretion\u2013ejection phenomena and on the star\u2013disk interaction region.<\/jats:p>\n<jats:p><jats:italic>Methods.<\/jats:italic> We obtained interferometric observations with VLTI\/GRAVITY in the <jats:italic>K<\/jats:italic>-band during two consecutive nights in August 2022. The analysis of the continuum emission, coupled with the differential analysis across the Br<jats:italic>\u03b3<\/jats:italic> line, allows us to constrain the morphology of the dust and the gas distribution in the innermost regions of S CrA N and to investigate their temporal variability. These observations are compared to magnetospheric accretion\u2013ejection models of T Tauri stars and to previous observations in order to elucidate the physical processes operating in these regions.<\/jats:p>\n<jats:p><jats:italic>Results.<\/jats:italic> The <jats:italic>K<\/jats:italic>-band continuum emission is well reproduced with an azimuthally modulated dusty ring with a half-light radius of 0.24 au (\u223c20 <jats:italic>R<\/jats:italic><jats:sub>*<\/jats:sub>), an inclination of \u223c30\u00b0, and a position angle of \u223c150\u00b0. As the star alone cannot explain such a large sublimation front, we propose that magnetospheric accretion is an important dust-heating mechanism leading to this continuum emission. The Br<jats:italic>\u03b3<\/jats:italic>-emitting region (0.05\u20130.06 au; 5\u20137 <jats:italic>R<\/jats:italic><jats:sub>*<\/jats:sub>) is found to be more compact than the continuum, to be similar in size or larger than the magnetospheric truncation radius. The on-sky displacements across the Br<jats:italic>\u03b3<\/jats:italic> spectral channels are aligned along a position angle offset by 45\u00b0 from the disk, and extend up to 2 <jats:italic>R<\/jats:italic><jats:sub>*<\/jats:sub>. This is in agreement with radiative transfer models combining magnetospheric accretion and disk winds. These on-sky displacements remain unchanged from one night to another, while the line flux decreases by 13%, suggesting a dominant contribution of wind to the origin of the Br<jats:italic>\u03b3<\/jats:italic> line.<\/jats:p>\n<jats:p><jats:italic>Conclusions.<\/jats:italic> Our observations support the scenario where the Br<jats:italic>\u03b3<\/jats:italic> line originates from a combination of (variable) accretion\u2013ejection processes in the inner disk region.<\/jats:p>","DOI":"10.1051\/0004-6361\/202451254","type":"journal-article","created":{"date-parts":[[2024,8,8]],"date-time":"2024-08-08T18:49:10Z","timestamp":1723142950000},"page":"A123","source":"Crossref","is-referenced-by-count":3,"title":["The GRAVITY young stellar object survey"],"prefix":"10.1051","volume":"690","author":[{"name":"GRAVITY Collaboration","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5762-0249","authenticated-orcid":false,"given":"H.","family":"Nowacki","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3099-757X","authenticated-orcid":false,"given":"K.","family":"Perraut","sequence":"additional","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5342-5713","authenticated-orcid":false,"given":"L.","family":"Labadie","sequence":"additional","affiliation":[]},{"given":"J.","family":"Bouvier","sequence":"additional","affiliation":[]},{"given":"C.","family":"Dougados","sequence":"additional","affiliation":[]},{"given":"M.","family":"Benisty","sequence":"additional","affiliation":[]},{"given":"J. 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