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May 27, 2026

The spectral energy distribution of YSES 1 b and its circumplanetary disc

Michiel Darcis Sebastiaan Y. Haffert T. Stolker Richelle van Capelleveen Matthew A. Kenworthy Pieter N. A. M. Visser Laird M. Close Olivier Guyon Alexander D. Hedglen Parker H. Johnson Maggie Kautz Jay K. Kueny Jialin Li Joseph D. Long Jennifer Lumbres Jared R. Males Eden McEwen Avalon L. McLeod Logan Pearce Lauren Schatz K. Van Gorkom

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Key Points

The study aims to refine the spectral energy distribution modeling of YSES 1 b and assess its physical parameters.
Utilized observations from MagAO-X at Las Campanas Observatory in r', i', and z' bands.
Merged data with archival VLT/SPHERE and VLT/NACO for comprehensive analysis.
Employed forward modeling, incorporating a circumplanetary disc model with dust extinction and blackbody radiation.
Including the circumplanetary disc model significantly improved the fit to photometric data.
Estimated temperature for YSES 1 b increased to 2854 K, compared to previous estimate of 1727 K.
The estimated mass increased to between 14 R_J (at 17 Myr) and 25.7 M_J (for age 17) or 41.6 M_J (for age 27).

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Implication

Study improves physical parameters of YSES 1 b, suggesting significant impact from circumplanetary disc.

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Cite This Study

Darcis et al. (2026) studied this question.

synapsesocial.com/papers/6a1fc730dee9eb8c0dce8182 https://doi.org/10.1051/0004-6361/202659005/pdf

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