Transits of Known Planets Orbiting a Naked-eye Star
Article
Article Title | Transits of Known Planets Orbiting a Naked-eye Star |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Kane, Stephen R. (Author), Yalcinkaya, Selcuk (Author), Osborn, Hugh P. (Author), Dalba, Paul A. (Author), Nielsen, Louise D. (Author), Vanderburg, Andrew (Author), Mocnik, Teo (Author), Hinkel, Natalie R. (Author), Ostberg, Colby (Author), Esmer, Ekrem Murat (Author), Udry, Stephane (Author), Fetherolf, Tara (Author), Basturk, Ozgur (Author), Ricker, George R. (Author), Vanderspek, Roland (Author), Latham, David W. (Author), Seager, Sara (Author), Winn, Joshua N. (Author), Jenkins, Jon M. (Author), Allart, Romain (Author), Bailey, Jeremy (Author), Bean, Jacob L. (Author), Bouchy, Francois (Author), Butler, R. Paul (Author), Campante, Tiago L. (Author), Carter, Brad D. (Author), Daylan, Tansu (Author), Deleuil, Magali (Author), Diaz, Rodrigo F. (Author), Dumusque, Xavier (Author), Ehrenreich, David (Author), Horner, Jonathan (Author), Howard, Andrew W. (Author), Isaacson, Howard (Author), Jones, Hugh R. A. (Author), Kristiansen, Martti H. (Author), Lovis, Christophe (Author), Marcy, Geoffrey W. (Author), Marmier, Maxime (Author), O'Toole, Simon J. (Author), Pepe, Francesco (Author), Ragozzine, Darin (Author), Segransan, Damien (Author), Tinney, C. G. (Author), Turnbull, Margaret C. (Author), Wittenmyer, Robert A. (Author), Wright, Duncan J. (Author) and Wright, Jason T. (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 160 (3), pp. 1-10 |
Article Number | 129 |
Number of Pages | 10 |
Year | 2020 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/aba835 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/aba835 |
Abstract | Some of the most scientifically valuable transiting planets are those that were already known from radial velocity (RV) surveys. This is primarily because their orbits are well characterized and they preferentially orbit bright stars that are the targets of RV surveys. The Transiting Exoplanet Survey Satellite (TESS) provides an opportunity to survey most of the known exoplanet systems in a systematic fashion to detect possible transits of their planets. HD 136352 (Nu2 Lupi) is a naked-eye (V = 5.78) G-type main-sequence star that was discovered to host three planets with orbital periods of 11.6, 27.6, and 108.1 days via RV monitoring with the High Accuracy Radial velocity Planet Searcher (HARPS) spectrograph. We present the detection and characterization of transits for the two inner planets of the HD 136352 system, revealing radii of 1.482-0.056+0.058 R ⊕ and 2.608-0.077+0.078 R ⊕ for planets b and c, respectively. We combine new HARPS observations with RV data from the Keck/High Resolution Echelle Spectrometer and the Anglo-Australian Telescope, along with TESS photometry from Sector 12, to perform a complete analysis of the system parameters. The combined data analysis results in extracted bulk density values of ρb = 7.8-1.1+1.2 g cm-3 and ρc = 3.50-0.36+0.41 g cm-3 for planets b and c, respectively, thus placing them on either side of the radius valley. The combination of the multitransiting planet system, the bright host star, and the diversity of planetary interiors and atmospheres means this will likely become a cornerstone system for atmospheric and orbital characterization of small worlds. |
Keywords | Exoplanets; Exoplanet atmospheres; Exoplanet structure; Transit; photometry; Radial velocity; 498; 487; 495; 1709; 1332; Astrophysics -; Earth and Planetary Astrophysics |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | For access to this article, please click on the URL link provided. |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | University of California, United States |
Ankara University, Turkiye | |
Massachusetts Institute of Technology, United States | |
University of Geneva, Switzerland | |
University of Texas at Austin, United States | |
Southwest Research Institute, United States | |
Harvard-Smithsonian Centre for Astrophysics, United States | |
Princeton University, United States | |
NASA Ames Research Center, United States | |
University of New South Wales | |
University of Chicago, United States | |
Carnegie Institution of Washington, United States | |
University of Porto, Portugal | |
Centre for Astrophysics | |
Aix-Marseille University, France | |
National University of General San Martin, Argentina | |
California Institute of Technology (Caltech), United States | |
University of Hertfordshire, United Kingdom | |
Technical University of Denmark, Denmark | |
Macquarie University | |
Brigham Young University, United States | |
SETI Institute, United States | |
Pennsylvania State University, United States |
https://research.usq.edu.au/item/q5yx4/transits-of-known-planets-orbiting-a-naked-eye-star
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