Cover Image

Updated planetary mass constraints of the young V1298 tau system using MAROON-X

The early K-type T-Tauri star, V1298 Tau (V = 10 mag, age ≈ 20-30 Myr) hosts four transiting planets with radii ranging from 4.9 to 9.6 R ⊕. The three inner planets have orbital periods of ≈8-24 days while the outer planet’s period is poorly constrained by single transits observed with K2 and the Tr...

Full description

Saved in:
Bibliographic Details
Main Authors: Sikora, James (Author) , Rowe, Jason (Author) , Barat, Saugata (Author) , Bean, Jacob L. (Author) , Brady, Madison (Author) , Désert, Jean-Michel (Author) , Feinstein, Adina D. (Author) , Gilbert, Emily A. (Author) , Henry, Gregory (Author) , Kasper, David (Author) , Lizotte, Déreck-Alexandre (Author) , Matesic, Michael R. B. (Author) , Panwar, Vatsal (Author) , Seifahrt, Andreas (Author) , Shivkumar, Hinna (Author) , Stefánsson, Gudmundur (Author) , Stürmer, Julian (Author)
Format: Article (Journal)
Language:English
Published: 2023
In: The astronomical journal
Year: 2023, Volume: 165, Issue: 6, Pages: 1-15
ISSN:1538-3881
DOI:10.3847/1538-3881/acc865
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.3847/1538-3881/acc865
Verlag, kostenfrei, Volltext: https://dx.doi.org/10.3847/1538-3881/acc865
Get full text
Author Notes:James Sikora, Jason Rowe, Saugata Barat, Jacob L. Bean, Madison Brady, Jean-Michel Désert, Adina D. Feinstein, Emily A. Gilbert, Gregory Henry, David Kasper, Déreck-Alexandre Lizotte, Michael R. B. Matesic, Vatsal Panwar, Andreas Seifahrt, Hinna Shivkumar, Gudmundur Stefánsson, and Julian Stürmer
Description
Summary:The early K-type T-Tauri star, V1298 Tau (V = 10 mag, age ≈ 20-30 Myr) hosts four transiting planets with radii ranging from 4.9 to 9.6 R ⊕. The three inner planets have orbital periods of ≈8-24 days while the outer planet’s period is poorly constrained by single transits observed with K2 and the Transiting Exoplanet Survey Satellite (TESS). Planets b, c, and d are proto-sub-Neptunes that may be undergoing significant mass loss. Depending on the stellar activity and planet masses, they are expected to evolve into super-Earths/sub-Neptunes that bound the radius valley. Here we present results of a joint transit and radial velocity (RV) modeling analysis, which includes recently obtained TESS photometry and MAROON-X RV measurements. Assuming circular orbits, we obtain a low-significance (≈2σ) RV detection of planet c, implying a mass of and a conservative 2σ upper limit of <39 M ⊕. For planets b and d, we derive 2σ upper limits of M b < 159 M ⊕ and M d < 41 M ⊕, respectively. For planet e, plausible discrete periods of P e > 55.4 days are ruled out at the 3σ level while seven solutions with 43.3 < P e/d < 55.4 are consistent with the most probable 46.768131 ± 000076 days solution within 3σ. Adopting the most probable solution yields a 2.6σ RV detection with a mass of 0.66 ± 0.26 M Jup. Comparing the updated mass and radius constraints with planetary evolution and interior structure models shows that planets b, d, and e are consistent with predictions for young gas-rich planets and that planet c is consistent with having a water-rich core with a substantial (∼5% by mass) H2 envelope.
Item Description:Veröffentlicht: 24. Mai 2023
Gesehen am 26.07.2023
Physical Description:Online Resource
ISSN:1538-3881
DOI:10.3847/1538-3881/acc865

Similar Items