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  • Koutoulaki, M.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),European Southern Observatory (ESO),University College Dublin, National University Of Ireland,Dublin Institute for Advanced Studies (author)

The GRAVITY young stellar object survey: IV. The CO overtone emission in 51 Oph at sub-au scales

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • 2021-01-07
  • EDP Sciences,2021
  • electronicrdacarrier

Numbers

  • LIBRIS-ID:oai:research.chalmers.se:99f92673-162f-409f-9fab-3678c4baf21d
  • https://research.chalmers.se/publication/521994URI
  • https://doi.org/10.1051/0004-6361/202038000DOI

Supplementary language notes

  • Language:English
  • Summary in:English

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

Notes

  • Context. 51 Oph is a Herbig Ae/Be star that exhibits strong near-infrared CO ro-vibrational emission at 2.3 μm, most likely originating in the innermost regions of a circumstellar disc. Aims. We aim to obtain the physical and geometrical properties of the system by spatially resolving the circumstellar environment of the inner gaseous disc. Methods. We used the second-generation Very Large Telescope Interferometer instrument GRAVITY to spatially resolve the continuum and the CO overtone emission. We obtained data over 12 baselines with the auxiliary telescopes and derive visibilities, and the differential and closure phases as a function of wavelength. We used a simple local thermal equilibrium ring model of the CO emission to reproduce the spectrum and CO line displacements. Results. Our interferometric data show that the star is marginally resolved at our spatial resolution, with a radius of ∼10.58 ± 2.65R·. The K-band continuum emission from the disc is inclined by 63° ± 1°, with a position angle of 116° ± 1°, and 4 ± 0.8 mas (0.5 ± 0.1 au) across. The visibilities increase within the CO line emission, indicating that the CO is emitted within the dust-sublimation radius. By modelling the CO bandhead spectrum, we derive that the CO is emitted from a hot (T = 1900-2800 K) and dense (NCO = (0.9-9) × 1021 cm-2) gas. The analysis of the CO line displacement with respect to the continuum allows us to infer that the CO is emitted from a region 0.10 ± 0.02 au across, well within the dust-sublimation radius. The inclination and position angle of the CO line emitting region is consistent with that of the dusty disc. Conclusions. Our spatially resolved interferometric observations confirm the CO ro-vibrational emission within the dust-free region of the inner disc. Conventional disc models exclude the presence of CO in the dust-depleted regions of Herbig AeBe stars. Ad hoc models of the innermost disc regions, that can compute the properties of the dust-free inner disc, are therefore required.

Subject headings and genre

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

  • Garcia-Lopez, R.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),Dublin Institute for Advanced Studies (author)
  • Natta, A.Dublin Institute for Advanced Studies (author)
  • Fedriani, Rubén,1991University College Dublin, National University Of Ireland,Dublin Institute for Advanced Studies,Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)fedriani (author)
  • Garatti, A. Caratti o.Dublin Institute for Advanced Studies,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),University College Dublin, National University Of Ireland (author)
  • Ray, T. P.Dublin Institute for Advanced Studies (author)
  • Coffey, DeirdreDublin Institute for Advanced Studies,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Brandner, W.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Dougados, C.Université Grenoble Alpes,Grenoble Alpes University (author)
  • Garcia, P. J.V.Instituto Superior Tecnico,Universidade do Porto,University of Porto,European Southern Observatory Santiago (author)
  • Klarmann, L.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Labadie, L.Universität zu Köln,University of Cologne (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)
  • Lin, C. C.University of Hawaii,Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (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)
  • Benisty, M.Universidad de Chile (UCH),University of Chile (UCH),Université Grenoble Alpes,Grenoble Alpes University (author)
  • Berger, J. P.Université Grenoble Alpes,Grenoble Alpes University (author)
  • Buron, A.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)
  • Clénet, Y.PSL University Paris (author)
  • Coudé Du Foresto, V.PSL University Paris (author)
  • De Zeeuw, P. 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)
  • Duvert, G.Université Grenoble Alpes,Grenoble Alpes University (author)
  • De Wit, W. J.European Southern Observatory Santiago (author)
  • Eckart, A.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)
  • Eisenhauer, F.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (author)
  • Filho, M.Instituto Superior Tecnico,Universidade do Porto,University of Porto,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)
  • Gendron, E.PSL University Paris (author)
  • Genzel, R.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),University of California (author)
  • Gillessen, S.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)
  • 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)
  • Henning, T.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)
  • Linz, H.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (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)
  • Ramírez-Tannus, M. C.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG) (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.Max Planck Gesellschaft zur Förderung der Wissenschaften e.V. (MPG),Max Planck Society for the Advancement of Science (MPG),Universiteit Leiden (UL),Leiden University (UL) (author)
  • Vincent, F.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)
  • 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)European Southern Observatory (ESO) (creator_code:org_t)

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  • In:Astronomy and Astrophysics: EDP Sciences6450004-63611432-0746

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Koutoulaki, M.
Garcia-Lopez, R.
Natta, A.
Fedriani, Rubén, ...
Garatti, A. Cara ...
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Lin, C. C.
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Bauböck, M.
Benisty, M.
Berger, J. P.
Buron, A.
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De Zeeuw, P. T.
Duvert, G.
De Wit, W. J.
Eckart, A.
Eisenhauer, F.
Filho, M.
Gao, F.
Gendron, E.
Genzel, R.
Gillessen, S.
Grellmann, R.
Habibi, M.
Haubois, X.
Haussmann, F.
Henning, T.
Hippler, S.
Hubert, Z.
Horrobin, M.
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Kervella, P.
Kolb, J.
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Linz, H.
Ott, T.
Paumard, T.
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Ramírez-Tannus, ...
Rau, C.
Rousset, G.
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Stadler, J.
Straub, O.
Straubmeier, C.
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