ALMA 0.88 mm Survey of Disks around Planetary-mass Companions

Ya Lin Wu, Brendan P. Bowler, Patrick D. Sheehan, Sean M. Andrews, Gregory J. Herczeg, Adam L. Kraus, Luca Ricci, David J. Wilner, Zhaohuan Zhu

研究成果: 雜誌貢獻期刊論文同行評審

摘要

Characterizing the physical properties and compositions of circumplanetary disks can provide important insights into the formation of giant planets and satellites. We report Atacama Large Millimeter/submillimeter Array 0.88 mm (Band 7) continuum observations of six planetary-mass (10-20 M Jup) companions: CT Cha b, 1RXS 1609 b, ROXs 12 b, ROXs 42B b, DH Tau b, and FU Tau b. No continuum sources are detected at the locations of the companions down to 3σ limits of 120-210 μJy. Given these nondetections, it is not clear whether disks around planetary-mass companions indeed follow the disk-flux-host-mass trend in the stellar regime. The faint radio brightness of these companion disks may result from a combination of fast radial drift and a lack of dust traps. Alternatively, as disks in binary systems are known to have significantly lower millimeter fluxes due to tidal interactions, these companion disks may instead follow the relationship of moderate-separation binary stars. This scenario can be tested with sensitive continuum imaging at rms levels of ≲10 μJy.

原文英語
文章編號227
期刊Astronomical Journal
159
發行號5
DOIs
出版狀態已發佈 - 2020 五月
對外發佈

ASJC Scopus subject areas

  • 天文和天體物理學
  • 空間與行星科學

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