Revised Properties and Dynamical History for the HD 17156 System
Article
Kane, Stephen R., Hill, Michelle L., Dalba, Paul A., Fetherolf, Tara, Henry, Gregory W., Fajardo-Acosta, Sergio B., Gnilka, Crystal L., Howard, Andrew W., Howell, Steve B. and Isaacson, Howard. 2023. "Revised Properties and Dynamical History for the HD 17156 System." The Astronomical Journal. 165 (6). https://doi.org/10.3847/1538-3881/acd17a
Article Title | Revised Properties and Dynamical History for the HD 17156 System |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Kane, Stephen R., Hill, Michelle L., Dalba, Paul A., Fetherolf, Tara, Henry, Gregory W., Fajardo-Acosta, Sergio B., Gnilka, Crystal L., Howard, Andrew W., Howell, Steve B. and Isaacson, Howard |
Journal Title | The Astronomical Journal |
Journal Citation | 165 (6) |
Article Number | 252 |
Number of Pages | 11 |
Year | 2023 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/acd17a |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/acd17a/meta |
Abstract | From the thousands of known exoplanets, those that transit bright host stars provide the greatest accessibility toward detailed system characterization. The first known such planets were generally discovered using the radial-velocity technique, then later found to transit. HD 17156b is particularly notable among these initial discoveries because it diverged from the typical hot-Jupiter population, occupying a 21.2 day eccentric (e = 0.68) orbit, offering preliminary insights into the evolution of planets in extreme orbits. Here we present new data for this system, including ground- and space-based photometry, radial velocities, and speckle imaging, that further constrain the system properties and stellar/planetary multiplicity. These data include photometry from the Transiting Exoplanet Survey Satellite that cover five transits of the known planet. We show that the system does not harbor any additional giant planets interior to 10 au. The lack of stellar companions and the age of the system indicate that the eccentricity of the known planet may have resulted from a previous planet-planet scattering event. We provide the results from dynamical simulations that suggest possible properties of an additional planet that culminated in ejection from the system, leaving a legacy of the observed high eccentricity for HD 17156b. © 2023. The Author(s). Published by the American Astronomical Society. |
Keywords | Exoplanet astronomy; Exoplanet dynamics; Exoplanet detection methods; Exoplanet systems; Exoplanets; Radial velocit; Photometry |
ANZSRC Field of Research 2020 | 5101. Astronomical sciences |
Byline Affiliations | University of California Riverside, United Sates |
University of California Santa Cruz, United States | |
SETI Institute, United States | |
Tennessee State University, United States | |
California Institute of Technology (Caltech), United States | |
Infrared Processing and Analysis Center (IPAC), United States | |
NASA Ames Research Center, United States | |
University of California Berkeley, United States | |
Centre for Astrophysics |
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