SIMBAD references

2024A&A...692L...5B - Astronomy and Astrophysics, volume 692L5 (2024/12-1)

Forbidden emission line spectro-imaging of the RU Lupi jet and low-velocity component.

BIRNEY M., WHELAN E.T., DOUGADOS C., PASCUCCI I., MURPHY A., FLORES-RIVERA L., FLOCK M. and KIRWAN A.

Abstract (from CDS):

The first images of the jet and low-velocity component (LVC) from the strongly accreting classical T Tauri star RU Lupi are presented. Adaptive optics-assisted spectro-imaging of forbidden emission lines was used. The main aim of the observations was to test the conclusion from a recent spectro-astrometric study that the narrow component (NC) of the LVC traces a magnetohydrodynamic (MHD) disk wind, and to estimate the mass-loss rate in the wind. The structure and morphology support a wind origin for the NC. The upper limit to the launch radius and semi-opening angle of the wind in [O I] λ6300 emission are estimated to be 2 au and 19°, in agreement with MHD wind models for high accretors. The height of the [O I] λ6300 wind-emitting region, a key parameter for the derivation of the mass-loss rate, is estimated for the first time at ∼35 au, giving Ṁout = 2.6 × 10–11 M⊙ yr–1. When compared to the derived mass-accretion rate of Ṁacc = 1.6 × 10–7 M⊙ yr–1, the efficiency in the wind is too low for the wind to contribute significantly to the angular momentum removal.

Abstract Copyright: © The Authors 2024

Journal keyword(s): stars: formation - stars: jets - stars: low-mass - stars: individual: RU Lupi - stars: winds - outflows

Simbad objects: 1

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