Architectures Of Planetary Systems II: Trends With Host Star Mass And Metallicity

The current census of planetary systems displays a wide range of architectures. Extending earlier work, this paper investigates the correlation between our classification framework for these architectures and host stellar properties.

Specifically, we explore how planetary system properties depend on stellar mass and stellar metallicity. This work confirms previously detected trends that jovian planets are less prevalent for low-mass and low-metallicity stars.

We also find new, but expected trends such as that the total mass in planets increases with stellar mass, and that observed planetary system masses show an upper limit that is roughly consistent with expectations from the stability of circumstellar disks. We tentatively identify potential unique trends in the host stars of super-puffs and hot jupiters and a possible subdivision of the class of hot jupiter systems.

In general, we find that system architectures are not overly dependent on host star properties.

Abridged quick-reference chart for our classification of planetary system architectures presented in Paper I. Each row corresponds to one planetary system, with horizontal spacing corresponding to orbital period on a log scale and point sizes corresponding to planet size. Colors correspond to planet type: jupiters in red, neptunes in yellow, sub-neptunes in blue, and earths in green. — astro-ph.EP

Alex R. Howe, Juliette C. Becker, Fred C. Adams

Comments: 17 pages, 6 figures, 1 table, accepted by AJ
Subjects: Earth and Planetary Astrophysics (astro-ph.E)
Cite as: arXiv:2602.03657 [astro-ph.EP] (or arXiv:2602.03657v1 [astro-ph.EP] for this version)
https://doi.org/10.48550/arXiv.2602.03657
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Submission history
From: Alex Howe
[v1] Tue, 3 Feb 2026 15:37:17 UTC (2,052 KB)
https://arxiv.org/abs/2602.03657
Astrobiology, Astrochemistry,