KELT-25 b and KELT-26 b: A Hot Jupiter and a Substellar Companion Transiting Young A Stars Observed by TESS
Article
Article Title | KELT-25 b and KELT-26 b: A Hot Jupiter and a Substellar Companion Transiting Young A Stars Observed by TESS |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Martinez, Romy Rodriguez (Author), Gaudi, B. Scott (Author), Rodriguez, Joseph E. (Author), Zhou, George (Author), Labadie-Bartz, Jonathan (Author), Quinn, Samuel N. (Author), Penev, Kaloyan (Author), Tan, Thiam-Guan (Author), Latham, David W. (Author), Paredes, Leonardo A. (Author), Kielkopf, John F. (Author), Addison, Brett (Author), Wright, Duncan J. (Author), Teske, Johanna (Author), Howell, Steve B. (Author), Ciardi, David (Author), Ziegler, Carl (Author), Stassun, Keivan G. (Author), Johnson, Marshall C. (Author), Eastman, Jason D. (Author), Siverd, Robert J. (Author), Beatty, Thomas G. (Author), Bouma, Luke (Author), Bedding, Timothy (Author), Pepper, Joshua (Author), Winn, Joshua (Author), Lund, Michael B. (Author), Villanueva, Steven, Jr. (Author), Stevens, Daniel J. (Author), Jensen, Eric L. N. (Author), Kilby, Coleman (Author), Crane, Jeffrey D. (Author), Tokovinin, Andrei (Author), Everett, Mark E. (Author), Tinney, C. G. (Author), Fausnaugh, Michael (Author), Cohen, David H. (Author), Bayliss, Daniel (Author), Bieryla, Allyson (Author), Cargile, Phillip A. (Author), Collins, Karen A. (Author), Conti, Dennis M. (Author), Colon, Knicole D. (Author), Curtis, Ivan A. (Author), DePoy, D. L. (Author), Evans, Phil (Author), Feliz, Dax L. (Author), Gregorio, Joao (Author), Rothenberg, Jason (Author), James, David J. (Author), Joner, Michael D. (Author), Kuhn, Rudolf B. (Author), Manner, Mark (Author), Khakpash, Somayeh (Author), Marshall, Jennifer L. (Author), McLeod, Kim K. (Author), Penny, Matthew T. (Author), Reed, Phillip A. (Author), Relles, Howard M. (Author), Stephens, Denise C. (Author), Stockdale, Chris (Author), Trueblood, Mark (Author), Trueblood, Pat (Author), Yao, Xinyu (Author), Zambelli, Roberto (Author), Vanderspek, Roland (Author), Seager, Sara (Author), Jenkins, Jon M. (Author), Henry, Todd J. (Author), James, Hodari-Sadiki (Author), Jao, Wei-Chun (Author), Wang, Sharon Xuesong (Author), Butler, Paul (Author), Thompson, Ian (Author), Shectman, Stephen (Author), Wittenmyer, Robert (Author), Bowler, Brendan P. (Author), Horner, Jonathan (Author), Kane, Stephen R. (Author), Mengel, Matthew W. (Author), Morton, Timothy D. (Author), Okumura, Jack (Author), Plavchan, Peter (Author), Zhang, Hui (Author), Scott, Nicholas J. (Author), Matson, Rachel A. (Author), Mann, Andrew W. (Author), Dragomir, Diana (Author), Gunther, Max (Author), Ting, Eric B. (Author), Glidden, Ana (Author) and Quintana, Elisa V. (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 160 (3), pp. 1-21 |
Article Number | 111 |
Number of Pages | 21 |
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/ab9f2d |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ab9f2d |
Abstract | We present the discoveries of KELT-25 b (TIC 65412605, TOI-626.01) and KELT-26 b (TIC 160708862, TOI-1337.01), two transiting companions orbiting relatively bright, early A stars. The transit signals were initially detected by the KELT survey and subsequently confirmed by Transiting Exoplanet Survey Satellite (TESS) photometry. KELT-25 b is on a 4.40 day orbit around the V = 9.66 star CD-24 5016 (Teff=8280-180+440 K, M ∗ = 2.18-0.11+0.12 M o˙), while KELT-26 b is on a 3.34 day orbit around the V = 9.95 star HD 134004 (Teff = 8640-240+500 K, M ∗ = 1.93-0.16+0.14 M o˙), which is likely an Am star. We have confirmed the substellar nature of both companions through detailed characterization of each system using ground-based and TESS photometry, radial velocity measurements, Doppler tomography, and high-resolution imaging. For KELT-25, we determine a companion radius of R P = 1.64-0.043+0.039 R J and a 3σ upper limit on the companion's mass of ∼64 M J. For KELT-26 b, we infer a planetary mass and radius of M P = 1.41-0.51+0.43MJ and R P = 1.94-0.058+0.060 R J. From Doppler tomographic observations, we find KELT-26 b to reside in a highly misaligned orbit. This conclusion is weakly corroborated by a subtle asymmetry in the transit light curve from the TESS data. KELT-25 b appears to be in a well-aligned, prograde orbit, and the system is likely a member of the cluster Theia 449. |
Keywords | Rotational velocities; planet; dwarf; exoplanets; south; sun; atmospheres; abundance; selection; project |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Institution of Origin | University of Southern Queensland |
Byline Affiliations | Ohio State University, United States |
Center for Astrophysics Harvard and Smithsonian, United States | |
University of Sao Paulo, Brazil | |
University of Texas at Dallas, United States | |
Perth Exoplanet Survey Telescope Observatory, Australia | |
Georgia State University, United States | |
School of Mathematics, Physics and Computing | |
Centre for Astrophysics | |
Carnegie Institution of Washington, United States | |
National Aeronautics and Space Administration (NASA), United States | |
University of Toronto, Canada | |
Vanderbilt University, United States | |
Las Cumbres Observatory, United States | |
Gemini Observatory, United States | |
University of Arizona, United States | |
Princeton University, United States | |
University of Sydney | |
Lehigh University, United States | |
Massachusetts Institute of Technology, United States | |
Swarthmore College, United States | |
Cerro Tololo Inter-American Observatory, Chile | |
National Optical Astronomy Observatory, United States | |
University of New South Wales | |
University of Warwick, United Kingdom | |
American Association of Variable Star Observers, United States | |
NASA Goddard Space Flight Center, United States | |
Ivan Curtis Private Observatory, Australia | |
Texas A&M University, United States | |
El Sauce Observatory, Chile | |
Atalaia Group and CROW Observatory, Portugal | |
University of Wyoming, United States | |
Brigham Young University, United States | |
South African Astronomical Observatory, South Africa | |
Spot Observatory, United States | |
Wellesley College, United States | |
Louisiana State University, United States | |
Kutztown University, United States | |
Hazelwood Observatory, Australia | |
Winer Observatory, United States | |
Lunae Astronomical Society, Italy | |
NASA Ames Research Center, United States | |
Carnegie Observatories Pasadena, United States | |
University of Texas at Austin, United States | |
University of California, United States | |
University of Florida, United States | |
George Mason University, United States | |
Nanjing University, China | |
University of North Carolina, United States | |
University of New Mexico, United States |
https://research.usq.edu.au/item/q5yxq/kelt-25-b-and-kelt-26-b-a-hot-jupiter-and-a-substellar-companion-transiting-young-a-stars-observed-by-tess
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