The POKEMON Speckle Survey of Nearby M Dwarfs. III. The Stellar Multiplicity Rate of M Dwarfs within 15 pc

[2401.14703] The POKEMON Speckle Survey of Nearby M Dwarfs. III. The Stellar Multiplicity Rate of M Dwarfs within 15 pc Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Astrophysics > Solar and Stellar Astrophysics arXiv:2401.14703 (astro-ph) [Submitted on 26 Jan 2024 ( v1 ), last revised 9 Apr 2026 (this version, v7)] Title: The POKEMON Speckle Survey of Nearby M Dwarfs. III. The Stellar Multiplicity Rate of M Dwarfs within 15 pc Authors: Catherine A. Clark , Gerard T. van Belle , Elliott P. Horch , David R. Ciardi , Kaspar von Braun , Brian A. Skiff , Jennifer G. Winters , Michael B. Lund , Mark E. Everett , Zachary D. Hartman , Joe Llama View a PDF of the paper titled The POKEMON Speckle Survey of Nearby M Dwarfs. III. The Stellar Multiplicity Rate of M Dwarfs within 15 pc, by Catherine A. Clark and 10 other authors View PDF HTML (experimental) Abstract: M dwarfs are ubiquitous in our galaxy, and the rate at which they host stellar companions, and the properties of these companions, provides a window into the formation and evolution of the star(s), and of any planets that they may host. The Pervasive Overview of 'Kompanions' of Every M dwarf in Our Neighborhood (POKEMON) speckle survey of nearby M dwarfs is volume-limited from M0V through M9V out to 15 pc, with additional targets at larger distances. In total, 1125 stars were observed, and 455 of these are within the volume-limited, 15-pc sample of M-dwarf primaries. When we combine the speckle observations with known companions from the literature, we find that the stellar multiplicity rate of M dwarfs within 15 pc is 23.5% plus or minus 2.0%, and that the companion rate is 28.8% plus or minus 2.1%. We also find that the projected separation distribution for multiples that are known to host planets peaks at 198 au, while the distribution for multiples that are not yet known to host planets peaks at 5.57 au. This result suggests that the presence of close-in stellar companions inhibits the formation of M-dwarf planetary systems, similar to what has been found for FGK stars. Comments: 18 pages, 5 figures. Accepted for publication in the Astronomical Journal Subjects: Solar and Stellar Astrophysics (astro-ph.SR) ; Earth and Planetary Astrophysics (astro-ph.EP) Cite as: arXiv:2401.14703 [astro-ph.SR] (or arXiv:2401.14703v7 [astro-ph.SR] for this version) https://doi.org/10.48550/arXiv.2401.14703 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Catherine Clark [ view email ] [v1] Fri, 26 Jan 2024 08:23:57 UTC (2,593 KB) [v2] Fri, 2 Feb 2024 22:08:35 UTC (2,611 KB) [v3] Wed, 13 Mar 2024 22:28:10 UTC (2,592 KB) [v4] Sat, 16 Mar 2024 20:20:44 UTC (2,592 KB) [v5] Thu, 5 Sep 2024 20:29:34 UTC (2,592 KB) [v6] Wed, 22 Jan 2025 18:00:10 UTC (2,592 KB) [v7] Thu, 9 Apr 2026 22:40:35 UTC (2,592 KB) Full-text links: Access Paper: View a PDF of the paper titled The POKEMON Speckle Survey of Nearby M Dwarfs. III. The Stellar Multiplicity Rate of M Dwarfs within 15 pc, by Catherine A. 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