TOI-4641b:ãnãligned warm Jupiter orbitingã bright ( V = 7.5) rapidly rotating F-star

Allyson Bieryla, George Zhou, Juliana García-Mejía, Tyler R. Fairnington, David W. Latham, Brad Carter, Jiayin Dong, Chelsea X. Huang, Simon J. Murphy, Avi Shporer, Karen A. Collins, Samuel N. Quinn, Mark E. Everett, Lars A. Buchhave, René Tronsgaard, David Charbonneau, Marshall C. Johnson, Gilbert A. Esquerdo, Michael Calkins, Perry BerlindJon M. Jenkins, George R. Ricker, Sara Seager, Joshua N. Winn, Thomas Barclay, Ismael Mireles, Martin Paegert, Joseph D. Twicken

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

We report the disco v ery of TOI-4641b,ã warm Jupiter transitingã rapidly rotating F-type star withã stellar ef fecti ve temperature of 6560 K. The planet hasã radius of 0.73 R Jup ,ã mass smaller than 3.87 M Jup (3 σ),ãndã period of 22.09 d. It is orbitingã bright star ( V = 7.5 mag) onã circular orbit withã radiusãnd mass of 1.73 R⊙and 1.41 M⊙ Follow-up ground-based photometry was obtained using the Tierras Observatory. Two transits wereãlso observed with the Tillinghast Reflector Echelle Spectrograph, revealing the star to haveã low projected spin-orbitãngle ( λ= 1 . 41 + 0 . 76 -0 . 76°). Such obliquity measurements for stars with warm Jupitersãre relatively few,ãnd may shed light on the formation of warm Jupiters. Among the known planets orbiting hotãnd rapidly rotating stars, TOI-4641b is one of the longest period planets to be thoroughly characterized. Unlike hot Jupitersãround hot stars whichãre more often misaligned, the warm Jupiter TOI-4641b is found inã well-aligned orbit. Future exploration of this parameter space canãdd one more dimension to the star-planet orbital obliquity distribution that has been well sampled for hot Jupiters.

Original languageEnglish (US)
Pages (from-to)10955-10964
Number of pages10
JournalMonthly Notices of the Royal Astronomical Society
Volume527
Issue number4
DOIs
StatePublished - Feb 1 2024

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Keywords

  • exoplanets
  • methods: observãtional
  • techniques: photometric
  • techniques: radial velocities
  • techniques: spectroscopic

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