%0 Journal Article
%T The wind and the magnetospheric accretion onto the T Tauri star S Coronae Australis at sub-au resolution
%A A. Amorim
%A A. Buron
%A A. Caratti o Garatti
%A A. Eckart
%A A. M¨¦rand
%A A. Ramirez
%A B. Lazareff
%A C. A. Hummel
%A C. Deen
%A C. Dougados
%A C. E. Garcia Dabo
%A C. Rau
%A C. Straubmeier
%A E. Gendron
%A E. M¨¹ller
%A E. Sturm
%A E. Wieprecht
%A E. Wiezorrek
%A E. van Dishoeck
%A F. Delplancke-Str£¿bele
%A F. Eisenhauer
%A F. Haussmann
%A F. Vincent
%A G. Perrin
%A G. Rousset
%A G. Zins
%A H. Bonnet
%A I. Waisberg
%A I. Wank
%A J. Dexter
%A J. Kolb
%A J. P. Berger
%A J. Panduro
%A J. Sanchez-Bermudez
%A J. Woillez
%A J.-B. Le Bouquin
%A K. Perraut
%A L. Jocou
%A L. Labadie
%A M. Benisty
%A M. Haug
%A M. Horrobin
%A M. Kulas
%A M. Lippa
%A M. Sch£¿ller
%A M. Wiest
%A N. Anugu
%A O. Pfuhl
%A P. Caselli
%A P. J. V. Garcia
%A P. Kervella
%A P. L¨¦na
%A R. Abuter
%A R. Garcia Lopez
%A R. Genzel
%A R.-R. Rohloff
%A S. Gillessen
%A S. Hippler
%A S. Kellner
%A S. Lacour
%A S. Scheithauer
%A S. Yazici
%A T. Ott
%A T. P. Ray
%A T. Paumard
%A Th. Henning
%A V. Coud¨¦ du Foresto
%A W. Brandner
%A W. F. Thi
%A W. de Wit
%A X. Haubois
%A Y. Cl¨¦net
%A Z. Hubert
%J -
%D 2017
%R 10.1051/0004-6361/201731058
%X <i>Aims. <i/>To investigate the inner regions of protoplanetary discs, we performed near-infrared interferometric observations of the classical T Tauri binary system S£¿CrA.<i>Methods. <i/>We present the first VLTI-GRAVITY high spectral resolution (<i>R<i/> ~ 4000) observations of a classical T Tauri binary, S£¿CrA (composed of S£¿CrA£¿N and S£¿CrA£¿S and separated by ~1.£¿4), combining the four 8m telescopes in dual-field mode. <i>Results. <i/>Our observations in the near-infrared <i>K<i/>-band continuum reveal a disc around each binary component, with similar half-flux radii of about 0.1 au at <i>d<i/> ~ 130£¿pc, inclinations (<i>i<i/> = 28 ¡À 3¡ã and <i>i<i/> = 22 ¡À 6¡ã), and position angles (PA = 0¡ã¡À 6¡ã and PA = ¨C2¡ã¡À 12¡ã), suggesting that they formed from the fragmentation of a common disc. The S£¿CrA£¿N spectrum shows bright He£¿i and Br<i>¦Ã<i/> line emission exhibiting inverse P£¿Cygni profiles, typically associated with infalling gas. The continuum-compensated Br<i>¦Ã<i/> line visibilities of S£¿CrA£¿N show the presence of a compact Br<i>¦Ã<i/> emitting region whose radius is about ~0.06£¿au, which is twice as big as the truncation radius. This component is mostly tracing a wind. Moreover, a slight radius change between the blue- and red-shifted Br<i>¦Ã<i/> line components is marginally detected.<i>Conclusions. <i/>The presence of an inverse P£¿Cygni profile in the He£¿i and Br<i>¦Ã<i/> lines, along with the tentative detection of a slightly larger size of the blue-shifted Br<i>¦Ã<i/> line component, hint at the simultaneous presence of a wind and magnetospheric accretion in S£¿CrA£¿N
%U https://www.aanda.org/articles/aa/full_html/2017/12/aa31058-17/aa31058-17.html