期刊
ASTROPHYSICAL JOURNAL
卷 870, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.3847/1538-4357/aaf1aa
关键词
circumstellar matter; ISM: jets and outflows; protoplanetary disks; stars: pre-main sequence; stars: winds, outflows
资金
- Collaborative NSF Astronomy & Astrophysics Research grant [1715022, 1713780, 1714229]
- European Research Council (ERC) under the European Union's Horizon 2020 research and innovation programme [757957]
- National Aeronautics and Space Administration [NNX15AD94G]
- NASA's Science Mission Directorate
- W.M. Keck Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1715022] Funding Source: National Science Foundation
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1714229, 1713780] Funding Source: National Science Foundation
We present a survey of optical [O I] emission at 6300 angstrom toward 65 T Tauri stars at the spectral resolution of similar to 7 km s(-1). Past work identified a highly blueshifted velocity component (HVC) tracing microjets and a less blueshifted low-velocity component (LVC) attributed to winds. We focus here on the LVC kinematics to investigate links between winds, jets, accretion, and disk dispersal. We track the behavior of four types of LVC components: a broad and a narrow component (BC and NC, respectively) in LVCs that are decomposed into two Gaussians which typically have an HVC, and single-Gaussian LVC profiles separated into those that have an HVC (SCJ) and those that do not (SC). The LVC centroid velocities and line widths correlate with the HVC EW and accretion luminosity, suggesting that LVC/winds and HVC/jets are kinematically linked and connected to accretion. The deprojected HVC velocity correlates with accretion luminosity, showing that faster jets come with higher accretion. BC and NC kinematics correlate, and their blueshifts are maximum at similar to 35 degrees, suggesting a conical wind geometry with this semi-opening angle. Only SCs include n(13-31) up to similar to 3, and their properties correlate with this infrared index, showing that [O I] emission recedes to larger radii as the inner dust is depleted, tracing less dense/hot gas and a decrease in wind velocity. Altogether, these findings support a scenario where optically thick, accreting inner disks launch radially extended MHD disk winds that feed jets, and where inner disk winds recede to larger radii and jets disappear in concert with dust depletion.
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