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A Wolf 359 in sheep's clothing: hunting for substellar companions in the fifth-closest system using combined high-contrast imaging and radial velocity analysis

Wolf 359 (CN Leo, GJ 406, Gaia DR3 3864972938605115520) is a low-mass star in the fifth-closest neighboring system (2.41 pc). Because of its relative youth and proximity, Wolf 359 offers a unique opportunity to study substellar companions around M stars using infrared high-contrast imaging and radia...

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Hauptverfasser: Bowens-Rubin, Rachel (VerfasserIn) , Murphy, Joseph M. Akana (VerfasserIn) , Hinz, Philip M. (VerfasserIn) , Limbach, Mary Anne (VerfasserIn) , Seifahrt, Andreas (VerfasserIn) , Kiman, Rocio (VerfasserIn) , Salama, Maïssa (VerfasserIn) , Mukherjee, Sagnick (VerfasserIn) , Brady, Madison (VerfasserIn) , Carter, Aarynn L. (VerfasserIn) , Jensen-Clem, Rebecca (VerfasserIn) , Kooten, Maaike A. M. van (VerfasserIn) , Isaacson, Howard (VerfasserIn) , Kosiarek, Molly (VerfasserIn) , Bean, Jacob L. (VerfasserIn) , Kasper, David (VerfasserIn) , Luque, Rafael (VerfasserIn) , Stefánsson, Gudmundur (VerfasserIn) , Stürmer, Julian (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: 2023 November 22
In: The astronomical journal
Year: 2023, Jahrgang: 166, Heft: 6, Pages: 1-23
ISSN:1538-3881
DOI:10.3847/1538-3881/ad03e5
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.3847/1538-3881/ad03e5
Verlag, lizenzpflichtig, Volltext: https://dx.doi.org/10.3847/1538-3881/ad03e5
Volltext
Verfasserangaben:Rachel Bowens-Rubin, Joseph M. Akana Murphy, Philip M. Hinz, Mary Anne Limbach, Andreas Seifahrt, Rocio Kiman, Maïssa Salama, Sagnick Mukherjee, Madison Brady, Aarynn L. Carter, Rebecca Jensen-Clem, Maaike A. M. van Kooten, Howard Isaacson, Molly Kosiarek, Jacob L. Bean, David Kasper, Rafael Luque, Gudmundur Stefánsson, and Julian Stürmer
Beschreibung
Zusammenfassung:Wolf 359 (CN Leo, GJ 406, Gaia DR3 3864972938605115520) is a low-mass star in the fifth-closest neighboring system (2.41 pc). Because of its relative youth and proximity, Wolf 359 offers a unique opportunity to study substellar companions around M stars using infrared high-contrast imaging and radial velocity monitoring. We present the results of Ms-band (4.67 μm) vector vortex coronagraphic imaging using Keck-NIRC2 and add 12 Keck-HIRES and 68 MAROON-X velocities to the radial velocity baseline. Our analysis incorporates these data alongside literature radial velocities from CARMENES, the High Accuracy Radial velocity Planet Searcher, and Keck-HIRES to rule out the existence of a close (a < 10 au) stellar or brown dwarf companion and the majority of large gas giant companions. Our survey does not refute or confirm the long-period radial velocity candidate, Wolf 359 b (P ∼ 2900 days), but rules out the candidate's existence as a large gas giant (>4 M Jup) assuming an age of younger than 1 Gyr. We discuss the performance of our high-contrast imaging survey to aid future observers using Keck-NIRC2 in conjunction with the vortex coronagraph in the Ms band and conclude by exploring the direct imaging capabilities with JWST to observe Jupiter- and Neptune-mass planets around Wolf 359.
Beschreibung:Gesehen am 26.01.2024
Beschreibung:Online Resource
ISSN:1538-3881
DOI:10.3847/1538-3881/ad03e5

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