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  • Garcia-Lopez, R.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Dublin Institute for Advanced Studies,University College Dublin, National University Of Ireland (author)

A measure of the size of the magnetospheric accretion region in TW Hydrae

  • Article/chapterEnglish2020

Publisher, publication year, extent ...

  • 2020-08-26
  • Springer Science and Business Media LLC,2020

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:e2e5d150-e93f-4ef5-912d-429626e50536
  • https://doi.org/10.1038/s41586-020-2613-1DOI
  • https://research.chalmers.se/publication/518888URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:art swepub-publicationtype
  • Subject category:ref swepub-contenttype

Notes

  • Stars form by accreting material from their surrounding disks. There is a consensus that matter flowing through the disk is channelled onto the stellar surface by the stellar magnetic field. This is thought to be strong enough to truncate the disk close to the corotation radius, at which the disk rotates at the same rate as the star. Spectro-interferometric studies in young stellar objects show that hydrogen emission (a well known tracer of accretion activity) mostly comes from a region a few milliarcseconds across, usually located within the dust sublimation radius1–3. The origin of the hydrogen emission could be the stellar magnetosphere, a rotating wind or a disk. In the case of intermediate-mass Herbig AeBe stars, the fact that Brackett γ (Brγ) emission is spatially resolved rules out the possibility that most of the emission comes from the magnetosphere4–6 because the weak magnetic fields (some tenths of a gauss) detected in these sources7,8 result in very compact magnetospheres. In the case of T Tauri sources, their larger magnetospheres should make them easier to resolve. The small angular size of the magnetosphere (a few tenths of a milliarcsecond), however, along with the presence of winds9,10 make the interpretation of the observations challenging. Here we report optical long-baseline interferometric observations that spatially resolve the inner disk of the T Tauri star TW Hydrae. We find that the near-infrared hydrogen emission comes from a region approximately 3.5 stellar radii across. This region is within the continuum dusty disk emitting region (7 stellar radii across) and also within the corotation radius, which is twice as big. This indicates that the hydrogen emission originates in the accretion columns (funnel flows of matter accreting onto the star), as expected in magnetospheric accretion models, rather than in a wind emitted at much larger distance (more than one astronomical unit).

Subject headings and genre

Added entries (persons, corporate bodies, meetings, titles ...)

  • Natta, A.Dublin Institute for Advanced Studies (author)
  • Garatti, A. Caratti o.Dublin Institute for Advanced Studies,University College Dublin, National University Of Ireland,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Ray, TomDublin Institute for Advanced Studies (author)
  • Fedriani, Rubén,1991Chalmers tekniska högskola,Chalmers University of Technology,Dublin Institute for Advanced Studies(Swepub:cth)fedriani (author)
  • Koutoulaki, M.European Southern Observatory (ESO),Dublin Institute for Advanced Studies (author)
  • Klarmann, L.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Perraut, K.Université Grenoble Alpes,Grenoble Alpes University (author)
  • Sanchez-Bermudez, J.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universidad Nacional Autónoma de México (UNAM),Universidad Nacional Autonoma de Mexico (author)
  • Benisty, M.Université Grenoble Alpes,Grenoble Alpes University,Universidad de Chile (UCH),University of Chile (UCH) (author)
  • Dougados, C.Université Grenoble Alpes,Grenoble Alpes University (author)
  • Labadie, L.Universität zu Köln,University of Cologne (author)
  • Brandner, W.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Garcia, P. J. V.European Southern Observatory Santiago,Instituto Superior Tecnico,Universidade do Porto,University of Porto (author)
  • Henning, T.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Caselli, P.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Duvert, G.Université Grenoble Alpes,Grenoble Alpes University (author)
  • De Zeeuw, T.Universiteit Leiden (UL),Leiden University (UL),Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Grellmann, R.Universität zu Köln,University of Cologne (author)
  • Abuter, R.European Southern Observatory (ESO) (author)
  • Amorim, A.Instituto Superior Tecnico,Universidade de Lisboa,University of Lisbon (author)
  • Bauböck, M.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Berger, J. P.European Southern Observatory (ESO),Université Grenoble Alpes,Grenoble Alpes University (author)
  • Bonnet, H.European Southern Observatory (ESO) (author)
  • Buron, A.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Clénet, Y.PSL University Paris (author)
  • Coudé Du Foresto, V.PSL University Paris (author)
  • De Wit, W. J.European Southern Observatory Santiago (author)
  • Eckart, A.Universität zu Köln,University of Cologne,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Eisenhauer, F.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Filho, M.Universidade do Porto,University of Porto,Instituto Superior Tecnico,European Southern Observatory Santiago (author)
  • Gao, F.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Garcia Dabo, C. E.European Southern Observatory (ESO) (author)
  • Gendron, E.PSL University Paris (author)
  • Genzel, R.University of California,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Gillessen, S.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Habibi, M.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Haubois, X.European Southern Observatory Santiago (author)
  • Haussmann, F.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Hippler, S.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Hubert, Z.Université Grenoble Alpes,Grenoble Alpes University (author)
  • Horrobin, M.Universität zu Köln,University of Cologne (author)
  • Jimenez-Rosales, AlejandraMax Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Jocou, L.Université Grenoble Alpes,Grenoble Alpes University (author)
  • Kervella, P.PSL University Paris (author)
  • Kolb, J.European Southern Observatory Santiago (author)
  • Lacour, S.PSL University Paris (author)
  • Le Bouquin, J. B.Université Grenoble Alpes,Grenoble Alpes University (author)
  • Léna, P.PSL University Paris (author)
  • Ott, T.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Paumard, T.PSL University Paris (author)
  • Perrin, G.PSL University Paris (author)
  • Pfuhl, O.European Southern Observatory (ESO) (author)
  • Ramirez, A.European Southern Observatory (ESO) (author)
  • Rau, C.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Rousset, G.PSL University Paris (author)
  • Scheithauer, S.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Shangguan, J.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Stadler, J.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Straub, O.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Straubmeier, C.Universität zu Köln,University of Cologne (author)
  • Sturm, E.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • van Dishoeck, E. F.Universiteit Leiden (UL),Leiden University (UL),Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Vincent, F. H.PSL University Paris (author)
  • von Fellenberg, S.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Widmann, F.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Wieprecht, E.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Wiest, M.Universität zu Köln,University of Cologne (author)
  • Wiezorrek, E.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Woillez, JulienEuropean Southern Observatory (ESO) (author)
  • Yazici, S.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universität zu Köln,University of Cologne (author)
  • Zins, G.European Southern Observatory Santiago (author)
  • Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG)Dublin Institute for Advanced Studies (creator_code:org_t)

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  • In:Nature: Springer Science and Business Media LLC584:7822, s. 547-5500028-08361476-4687

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