A Magnetically Driven Disk Wind in the Inner Disk of PDS 70

Abstract PDS 70 is so far the only young disk where multiple planets have been detected by direct imaging. The disk has a large cavity when seen at submillimeter and near-infrared wavelengths, which hosts two massive planets. This makes PDS 70 the ideal target to study the physical conditions in a s...

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Published inThe Astrophysical journal Vol. 956; no. 1; p. 25
Main Authors Campbell-White, Justyn, Manara, Carlo F., Benisty, Myriam, Natta, Antonella, Claes, Rik A. B., Frasca, Antonio, Bae, Jaehan, Facchini, Stefano, Isella, Andrea, Pérez, Laura, Pinilla, Paola, Sicilia-Aguilar, Aurora, Teague, Richard
Format Journal Article
LanguageEnglish
Published Philadelphia IOP Publishing 01.10.2023
Subjects
Accretion
Astrophysics
Classical T Tauri stars
Deposition
Disks
Emission
High resolution spectroscopy
Holes
Jupiter
Luminosity
Planets
Protoplanetary disks
Star formation
Stellar accretion disks
Variable stars
Wavelengths
Weak-line T Tauri stars
Wind
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Summary:Abstract PDS 70 is so far the only young disk where multiple planets have been detected by direct imaging. The disk has a large cavity when seen at submillimeter and near-infrared wavelengths, which hosts two massive planets. This makes PDS 70 the ideal target to study the physical conditions in a strongly depleted inner disk shaped by two giant planets, and in particular to test whether disk winds can play a significant role in its evolution. Using X-Shooter and HARPS spectra, we detected for the first time the wind-tracing [O i ] 6300 Å line, and confirm the low-moderate value of mass-accretion rate in the literature. The [O i ] line luminosity is high with respect to the accretion luminosity when compared to a large sample of disks with cavities in nearby star-forming regions. The FWHM and blueshifted peak of the [O i ] line suggest an emission in a region very close to the star, favoring a magnetically driven wind as the origin. We also detect wind emission and high variability in the He i 10830 Å line, which is unusual for low accretors. We discuss that, although the cavity of PDS 70 was clearly carved out by the giant planets, the substantial inner-disk wind could also have had a significant contribution to clearing the inner disk.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/acf0c0