Limits on Millimeter Continuum Emission from Circumplanetary Material in the DSHARP Disks - Archive ouverte HAL Access content directly
Journal Articles The Astrophysical Journal Year : 2021

Limits on Millimeter Continuum Emission from Circumplanetary Material in the DSHARP Disks

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1
Sean M. Andrews
  • Function : Author
William Elder
  • Function : Author
Shangjia Zhang
  • Function : Author
Jane Huang
  • Function : Author
Nicolás T. Kurtovic
  • Function : Author
David J. Wilner
  • Function : Author
Zhaohuan Zhu
  • Function : Author
John M. Carpenter
  • Function : Author
Laura M. Pérez
  • Function : Author
Richard Teague
Andrea Isella
Luca Ricci
  • Function : Author

Abstract

We present a detailed analysis for a subset of the high-resolution (~35 mas, or 5 au) ALMA observations from the Disk Substructures at High Angular Resolution Project (DSHARP) to search for faint 1.3 mm continuum emission associated with dusty circumplanetary material located within the narrow annuli of depleted emission (gaps) in circumstellar disks. This search used the Jennings et al. frank modeling methodology to mitigate contamination from the local disk emission and then deployed a suite of injection-recovery experiments to statistically characterize point-like circumplanetary disks in residual images. While there are a few putative candidates in this sample, they have only marginal local signal-to-noise ratios and would require deeper measurements to confirm. Associating a 50% recovery fraction with an upper limit, we find that these data are sensitive to circumplanetary disks with flux densities ≳50-70 μJy in most cases. There are a few examples where those limits are inflated (≳110 μJy) owing to lingering nonaxisymmetric structures in their host circumstellar disks, most notably for a newly identified faint spiral in the HD 143006 disk. For standard assumptions, this analysis suggests that these data should be sensitive to circumplanetary disks with dust masses $rsim 0.001\mbox{--}0.2\,{M}_{\oplus }$. While those bounds are comparable to some theoretical expectations for young giant planets, we discuss how plausible system properties (e.g., relatively low host planet masses or the efficient radial drift of solids) could require much deeper observations to achieve robust detections.

Dates and versions

insu-03636633 , version 1 (11-04-2022)

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Sean M. Andrews, William Elder, Shangjia Zhang, Jane Huang, Myriam Benisty, et al.. Limits on Millimeter Continuum Emission from Circumplanetary Material in the DSHARP Disks. The Astrophysical Journal, 2021, 916, ⟨10.3847/1538-4357/ac00b9⟩. ⟨insu-03636633⟩
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