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  3. JWST MIRI MRS Images of Disk Winds, Water, and CO in an Edge-on Protoplanetary Disk
 

JWST MIRI MRS Images of Disk Winds, Water, and CO in an Edge-on Protoplanetary Disk

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BORIS DOI
10.48620/88911
Date of Publication
April 1, 2024
Publication Type
Article
Division/Institute

Center for Space and ...

Physics Institute, Sp...

NCCR PlanetS

Author
Arulanantham, Nicole
McClure, M. K.
Pontoppidan, Klaus
Beck, Tracy L.
Sturm, J. A.
Harsono, D.
Boogert, A. C. A.
Cordiner, M.
Dartois, E.
Drozdovskaya, M. N.orcid-logo
Center for Space and Habitability (CSH)
Espaillat, C.
Melnick, G. J.
Noble, J. A.
Palumbo, M. E.
Pendleton, Y. J.
Terada, H.
van Dishoeck, E. F.
Series
The Astrophysical Journal Letters
ISSN or ISBN (if monograph)
2041-8205
2041-8213
Publisher
American Astronomical Society
Language
English
Publisher DOI
10.3847/2041-8213/ad35c9
Description
We present JWST MIRI MRS observations of the edge-on protoplanetary disk around the young subsolar-mass star Tau 042021, acquired as part of the Cycle 1 GO program "Mapping Inclined Disk Astrochemical Signatures." These data resolve the mid-IR spatial distributions of H2, revealing X-shaped emission extending to ∼200 au above the disk midplane with a semiopening angle of 35° ± 5°. We do not velocity-resolve the gas in the spectral images, but the measured semiopening angle of the H2 is consistent with a magnetohydrodynamic wind origin. A collimated, bipolar jet is seen in forbidden emission lines from [Ne ii], [Ne iii], [Ni ii], [Fe ii], [Ar ii], and [S iii]. Extended H2O and CO emission lines are also detected, reaching diameters of ∼90 and 190 au, respectively. Hot molecular emission is not expected at such radii, and we interpret its extended spatial distribution as scattering of inner disk molecular emission by dust grains in the outer disk surface. H i recombination lines, characteristic of inner disk accretion shocks, are similarly extended and are likely also scattered light from the innermost star–disk interface. Finally, we detect extended polycyclic aromatic hydrocarbon (PAH) emission at 11.3 μm cospatial with the scattered-light continuum, making this the first low-mass T Tauri star around which extended PAHs have been confirmed, to our knowledge. MIRI MRS line images of edge-on disks provide an unprecedented window into the outflow, accretion, and scattering processes within protoplanetary disks, allowing us to constrain the disk lifetimes and accretion and mass-loss mechanisms.
Handle
https://boris-portal.unibe.ch/handle/20.500.12422/212617
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