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Published in

Hans Publishers, Astronomy & Astrophysics, (620), p. L1, 2018

DOI: 10.1051/0004-6361/201834271

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ALMA detects a radial disk wind in DG Tauri

This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Preprint: archiving forbidden
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Postprint: archiving forbidden
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Published version: archiving forbidden
Data provided by SHERPA/RoMEO

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 C18O 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.