The TESS-Keck Survey. XI. Mass Measurements for Four Transiting Sub-Neptunes Orbiting K Dwarf TOI-1246
Artikel i vetenskaplig tidskrift, 2022
Multiplanet systems are valuable arenas for investigating exoplanet architectures and comparing planetary siblings. TOI-1246 is one such system, with a moderately bright K dwarf (V = 11.6, K = 9.9) and four transiting sub-Neptunes identified by TESS with orbital periods of 4.31, 5.90, 18.66, and 37.92 days. We collected 130 radial velocity observations with Keck/HIRES and TNG/HARPS-N to measure planet masses. We refit the 14 sectors of TESS photometry to refine planet radii (2.97 +/- 0.06 R (circle plus), 2.47 +/- 0.08 R (circle plus), 3.46 +/- 0.09 R (circle plus), and 3.72 +/- 0.16 R (circle plus)) and confirm the four planets. We find that TOI-1246 e is substantially more massive than the three inner planets (8.1 +/- 1.1 M (circle plus), 8.8 +/- 1.2 M (circle plus), 5.3 +/- 1.7 M (circle plus), and 14.8 +/- 2.3 M (circle plus)). The two outer planets, TOI-1246 d and TOI-1246 e, lie near to the 2:1 resonance (P (e)/P ( d ) = 2.03) and exhibit transit-timing variations. TOI-1246 is one of the brightest four-planet systems, making it amenable for continued observations. It is one of only five systems with measured masses and radii for all four transiting planets. The planet densities range from 0.70 +/- 0.24 to 3.21 +/- 0.44 g cm(-3), implying a range of bulk and atmospheric compositions. We also report a fifth planet candidate found in the RV data with a minimum mass of 25.6 +/- 3.6 M (circle plus). This planet candidate is exterior to TOI-1246 e, with a candidate period of 93.8 days, and we discuss the implications if it is confirmed to be planetary in nature.
Författare
Turtelboom
University of California
Lauren M. Weiss
University of Notre Dame
Courtney D. Dressing
University of California
Grzegorz Nowak
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Enric Palle
Instituto de Astrofísica de Canarias
Universidad de la Laguna
Corey Beard
University of California at Irvine (UCI)
Sarah Blunt
California Institute of Technology (Caltech)
Casey Brinkman
University of Hawaii
Ashley Chontos
University of Hawaii
Zachary R. Claytor
University of Hawaii
Fei Dai
California Institute of Technology (Caltech)
Paul A. Dalba
University of California at Riverside
University of California at Santa Cruz
Steven Giacalone
University of California
Erica Gonzales
University of California at Santa Cruz
Caleb K. Harada
University of California
Michelle L. Hill
University of California at Riverside
Rae Holcomb
University of California at Irvine (UCI)
Judith Korth
Chalmers, Rymd-, geo- och miljövetenskap, Astronomi och plasmafysik
Jack Lubin
University of California at Irvine (UCI)
Thomas Masseron
Instituto de Astrofísica de Canarias
Universidad de la Laguna
Mason MacDougall
University of California at Los Angeles
Andrew W. Mayo
Köpenhamns universitet
University of California
Teo Mocnik
NSF's National Optical-Infrared Astronomy Research Laboratory (NOIRLab)
Joseph M. Akana Murphy
University of California at Santa Cruz
Alex S. Polanski
University of Kansas
Malena Rice
Yale University
Ryan A. Rubenzahl
California Institute of Technology (Caltech)
Nicholas Scarsdale
University of California at Santa Cruz
Keivan G. Stassun
Vanderbilt University
Dakotah B. Tyler
University of California at Los Angeles
Judah Van Zandt
University of California at Los Angeles
Ian J. M. Crossfield
University of Kansas
Hans J. Deeg
Instituto de Astrofísica de Canarias
Universidad de la Laguna
Benjamin Fulton
California Institute of Technology (Caltech)
Davide Gandolfi
Universita degli Studi di Torino
Andrew W. Howard
California Institute of Technology (Caltech)
Dan Huber
University of Hawaii
Howard Isaacson
University of Southern Queensland
University of California
Stephen R. Kane
University of California at Riverside
Kristine W. F. Lam
Deutsches Zentrums für Luft- und Raumfahrt (DLR)
Rafael Luque
Consejo Superior de Investigaciones Científicas (CSIC)
Eduardo L. Martin
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Consejo Superior de Investigaciones Científicas (CSIC)
Giuseppe Morello
Universidad de la Laguna
Instituto de Astrofísica de Canarias
Jaume Orell-Miquel
Instituto de Astrofísica de Canarias
Universidad de la Laguna
Erik A. Petigura
University of California at Los Angeles
Paul Robertson
University of California at Irvine (UCI)
Arpita Roy
Space Telescope Science Institute (STScI)
Johns Hopkins University
Vincent Van Eylen
University College London (UCL)
David Baker
Austin College
Alexander A. Belinski
Moscow State University
Allyson Bieryla
Harvard-Smithsonian Center for Astrophysics
David R. Ciardi
California Institute of Technology (Caltech)
Karen A. Collins
Harvard-Smithsonian Center for Astrophysics
Neil Cutting
Austin College
Devin J. Della-Rose
US Air Force Academy
Taylor B. Ellingsen
George Mason University
E. Furlan
California Institute of Technology (Caltech)
Tianjun Gan
Tsinghua University
Crystal L. Gnilka
California Institute of Technology (Caltech)
National Aeronautics and Space Administration (NASA)
Pere Guerra
Observatori Astronòmic Albanya
Steve B. Howell
National Aeronautics and Space Administration (NASA)
Mary Jimenez
George Mason University
David W. Latham
Harvard-Smithsonian Center for Astrophysics
Maude Lariviere
Université de Montréal
McGill University
Lester
National Aeronautics and Space Administration (NASA)
Jorge Lillo-Box
Centro de Astrobiologia (CAB)
Lindy Luker
Austin College
Christopher R. Mann
Université de Montréal
Peter P. Plavchan
George Mason University
Boris Safonov
Moscow State University
Brett Skinner
Austin College
Ivan A. Strakhov
Moscow State University
Justin M. Wittrock
George Mason University
Douglas A. Caldwell
SETI Institute
Zahra Essack
Massachusetts Institute of Technology (MIT)
Jon M. Jenkins
National Aeronautics and Space Administration (NASA)
Quintana
National Aeronautics and Space Administration (NASA)
George R. Ricker
Massachusetts Institute of Technology (MIT)
Roland Vanderspek
Massachusetts Institute of Technology (MIT)
S. Seager
Massachusetts Institute of Technology (MIT)
Joshua N. Winn
Princeton University
Astronomical Journal
0004-6256 (ISSN) 1538-3881 (eISSN)
Vol. 163 6 293Ämneskategorier (SSIF 2011)
Astronomi, astrofysik och kosmologi
Annan fysik
Den kondenserade materiens fysik
DOI
10.3847/1538-3881/ac69e5