Discovery of an Inflated Hot Neptune and Its Formation from Jovian Mass Loss

arXiv:2607.01315 · astro-ph.EP · Submitted 2026-07-01 · Read on arXiv

Grant C. Weldon, Samuel W. Yee, Bradley M. S. Hansen, Smadar Naoz, Joel D. Hartman, Joshua N. Winn, R. Paul Butler, Jeffrey D. Crane, Phil Evans, Tianjun Gan, Steve B. Howell, Michelle Kunimoto, David Osip, David Rapetti, Stephen A. Shectman, Keivan G. Stassun, Johanna K. Teske, Roberto Zambelli, George Zhou, Carl Ziegler

astro-ph.EP

Submitted: 2026-07-01

Comments: 26 pages, 10 figures

Code: https://github.com/hpparvi/PyDE

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Core — 10× in this paper · explained in 2 episodes
• Aperture — 8× in this paper · explained in 1 episode
• Metallicity — 5× in this paper · explained in 3 episodes
• Benchmark — 2× in this paper · explained in 2 episodes
• Eccentric Kozai-Lidov — 2× in this paper
• Population Synthesis — 2× in this paper · explained in 2 episodes
• Society of Photo-Optical Instrumentation Engineers — 2× in this paper
• Abundance — 1× in this paper · explained in 1 episode
• Alignment — 1× in this paper · explained in 1 episode
• Aperture Photometry — 1× in this paper · explained in 1 episode
• Calibration — 1× in this paper · explained in 7 episodes
• Degeneracy — 1× in this paper · explained in 3 episodes
• Full Frame Image — 1× in this paper
• Mikulski Archive for Space Telescopes — 1× in this paper
• Modules for Experiments in Stellar Astrophysics — 1× in this paper
• Siding Springs Observatory — 1× in this paper
• TESS Object of Interest — 1× in this paper

Sources

• The Neptunian ridge as a natural outcome of high-eccentricity tidal migration
• EXOFASTv2: A public, generalized, publication-quality exoplanet modeling code
• POSEIDON II: The Anti-Aligned Orbit of the Warm Neptune TOI-1710 A b
• The Densities of Planets and the Masses of Host Stars
• Revealing the Origin of Desert Dwellers via Stellar Obliquities
• POSEIDON I: The Dynamical Origins of Transiting Neptunes
• Possible Dynamical Pathways to the Misalignment of the VHS 1256-1257 System
• Do Super-Puffs Defy Core Accretion? Population-Wide Interior Structure Constraints
• Once a Triple, Not Always a Triple: The Evolution of Hierarchical Triples that Yield Merged Inner Binaries
• The Hot Jupiter Radius Anomaly and Stellar Connections
• Analytical models for secular descents in hierarchical triple systems
• Dynamical tide modified Roche limit in eccentric, asynchronous binaries
• Dynamical Tides during High-Eccentricity Migration produces the Hot Jupiter Pile-up, Neptune Ridge, and Neptune Desert

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• Atmospheric escape fractionates secondary but not primary atmospheres
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