MINDS. JWST-MIRI Observations of a Spatially Resolved Atomic Jet and Polychromatic Molecular Wind Toward SY Cha

arXiv - PHYS - Solar and Stellar Astrophysics Pub Date : 2024-09-17 DOI:arxiv-2409.11176

Kamber R. Schwarz, Matthias Samland, Göran Olofsson, Thomas Henning, Andrew Sellek, Manuel Güdel, Benoît Tabone, Inga Kamp, Pierre-Olivier Lagage, Ewine F. van Dishoeck, Alessio Caratti o Garatti, Adrian M. Glauser, Tom P. Ray, Aditya M. Arabhavi, Valentin Christiaens, Riccardo Franceschi, Danny Gasman, Sierra L. Grant, Jayatee Kanwar, Till Kaeufer, Nicolas T. Kurtovic, Giulia Perotti, Milou Temmink, Marissa Vlasblom

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Abstract

The removal of angular momentum from protostellar systems drives accretion onto the central star and may drive the dispersal of the protoplanetary disk. Winds and jets can contribute to removing angular momentum from the disk, though the dominant process remain unclear. To date, observational studies of resolved disk winds have mostly targeted highly inclined disks. We report the detection of extended H2 and [Ne II] emission toward the young stellar object SY Cha with the JWST Mid-InfraRed Instrument Medium Resolution Spectrometer (MIRI-MRS). This is one of the first polychromatic detections of extended H2 toward a moderately inclined, i=51.1 degrees, Class II source. We measure the semi-opening angle of the H2 emission as well as build a rotation diagram to determine the H2 excitation temperature and abundance. We find a wide semi-opening angle, high temperature, and low column density for the H2 emission, all of which are characteristic of a disk wind. These observations demonstrate MIRI-MRS's utility in expanding studies of resolved disk winds beyond edge-on sources.

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MINDS.JWST-MIRI 对飞向 SY Cha 的空间分辨原子喷流和多色分子风的观测

原恒星系统角动量的去除会推动中心恒星的吸积，并可能推动原行星盘的扩散。迄今为止，对已分辨盘风的观测研究大多以高倾角盘为目标。我们报告了利用 JWST Mid-Infrared Instrument Medium Resolution Spectrometer（MIRI-MRS）对年轻恒星天体SY Cha 的 H2 和 [Ne II] 延伸发射的探测结果。这是首次多色探测到一个中等倾角（i=51.1度）的II类源的扩展H2。我们测量了H2发射的半开角，并绘制了旋转图，以确定H2的激发温度和丰度。我们发现 H2 发射的半开角大、温度高、柱密度低，这些都是盘风的特征。这些观测结果证明了 MIRI-MRS 在扩大对边缘源以外的解析盘风研究方面的作用。

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arXiv - PHYS - Solar and Stellar Astrophysics

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