ALMA detects a radial disk wind in DG Tau

M. Guedel; C. Eibensteiner; O. Dionatos; M. Audard; J. Forbrich; S. Kraus; Ch. Rab; Ch. Schneider; S. Skinner; E. Vorobyov

doi:10.1051/0004-6361/201834271

ALMA detects a radial disk wind in DG Tau

Solar and Stellar Astrophysics 2018-11-28 v1 Astrophysics of Galaxies

Authors: M. Guedel , C. Eibensteiner , O. Dionatos , M. Audard , J. Forbrich , S. Kraus , Ch. Rab , Ch. Schneider , S. Skinner , E. Vorobyov

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Abstract

Aims: We aim to use the high spatial resolution of the Atacama Large Millimeter/submillimeter Array (ALMA) to map the flow pattern of molecular gas near DG Tau and its disk, a young stellar object driving a jet and a molecular outflow. Methods: We use observations from ALMA in the J = 2 - 1 transition of 12CO, 13CO, and C18O to study the Keplerian disk of DG Tau and outflows that may be related to the disk and the jet. Results: We find a new wind component flowing radially at a steep angle (~25 deg from the vertical) above the disk with a velocity of ~ 3.1 km/s. It continues the trend of decreasing velocity for increasing distance from the jet axis ("onion-like velocity structure"). Conclusions: The new component is located close to the protostellar disk surface and may be related to photoevaporative winds.

Keywords

protoplanetary disks atacama large millimeter/submillimeter array debris disk

Cite

@article{arxiv.1810.12251,
  title  = {ALMA detects a radial disk wind in DG Tau},
  author = {M. Guedel and C. Eibensteiner and O. Dionatos and M. Audard and J. Forbrich and S. Kraus and Ch. Rab and Ch. Schneider and S. Skinner and E. Vorobyov},
  journal= {arXiv preprint arXiv:1810.12251},
  year   = {2018}
}

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Astronomy and Astrophysics Letters, in press, 8 pages

ALMA detects a radial disk wind in DG Tau

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