ALMA detects a radial disk wind in DG Tauri

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 Tauri

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 Tauri 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 C ¹⁸O to study the Keplerian disk of DG Tauri 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° from the vertical) above the disk with a velocity of ≈ 3.1 km s ^-1. 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.

Original language	English
Article number	L1
Journal	Astronomy & Astrophysics
Volume	620
Early online date	23 Nov 2018
DOIs	https://doi.org/10.1051/0004-6361/201834271
Publication status	Published - 1 Dec 2018

Keywords

Outflows
Protoplanetary disks
Stars: Pre-main sequence
Stars: Winds

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10.1051/0004-6361/201834271Licence: Other

1810.12251v1
Reproduced with permission from Astronomy & Astrophysics. © 2018 ESO.
Accepted author manuscript, 10 MBLicence: Other

Cite this

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title = "ALMA detects a radial disk wind in DG Tauri",

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 Tauri 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 C 18O to study the Keplerian disk of DG Tauri 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° from the vertical) above the disk with a velocity of ≈ 3.1 km s -1. 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 = "Outflows, Protoplanetary disks, Stars: Pre-main sequence, Stars: Winds",

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",

note = "Astronomy and Astrophysics Letters, in press, 8 pages ",

year = "2018",

month = dec,

day = "1",

doi = "10.1051/0004-6361/201834271",

language = "English",

volume = "620",

journal = "Astronomy & Astrophysics",

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TY - JOUR

T1 - ALMA detects a radial disk wind in DG Tauri

AU - Guedel, M.

AU - Eibensteiner, C.

AU - Dionatos, O.

AU - Audard, M.

AU - Forbrich, J.

AU - Kraus, S.

AU - Rab, Ch

AU - Schneider, Ch

AU - Skinner, S.

AU - Vorobyov, E.

N1 - Astronomy and Astrophysics Letters, in press, 8 pages

PY - 2018/12/1

Y1 - 2018/12/1

N2 - 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 Tauri 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 C 18O to study the Keplerian disk of DG Tauri 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° from the vertical) above the disk with a velocity of ≈ 3.1 km s -1. 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.

AB - 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 Tauri 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 C 18O to study the Keplerian disk of DG Tauri 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° from the vertical) above the disk with a velocity of ≈ 3.1 km s -1. 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.

KW - Outflows

KW - Protoplanetary disks

KW - Stars: Pre-main sequence

KW - Stars: Winds

UR - http://www.scopus.com/inward/record.url?scp=85057423888&partnerID=8YFLogxK

U2 - 10.1051/0004-6361/201834271

DO - 10.1051/0004-6361/201834271

M3 - Letter

SN - 0004-6361

VL - 620

JO - Astronomy & Astrophysics

JF - Astronomy & Astrophysics

M1 - L1

ER -

ALMA detects a radial disk wind in DG Tauri

Abstract

Keywords

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