The Discovery and Mass Measurement of a New Ultra-short-period Planet: K2-131b
Article
Article Title | The Discovery and Mass Measurement of a New Ultra-short-period Planet: K2-131b |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Dai, Fei, Winn, Joshua N., Gandolfi, Davide, Wang, Sharon X., Teske, Johanna K., Burt, Jennifer, Albrecht, Simon, Barragan, Oscar, Cochran, William D., Endl, Michael, Fridlund, Malcolm, Hatzes, Artie P., Hirano, Teruyuki, Hirsch, Lea A., Johnson, Marshall C., Justesen, Anders Bo, Livingston, John, Persson, Carina M., Prieto-Arranz, Jorge, Vanderburg, Andrew, Alonso, Roi, Antoniciello, Giuliano, Arriagada, Pamela, Butler, R. P., Cabrera, Juan, Crane, Jeffrey D., Cusano, Felice, Csizmadia, Szilard, Deeg, Hans, Dieterich, Sergio B., Eigmueller, Philipp, Erikson, Anders, Everett, M., Fukui, Akihiko, Grziwa, Sascha, Guenther, Eike W., Henry, Gregory W., Howell, Steve B., Johnson, John Asher, Korth, Judith, Kuzuhara, Masayuki, Narita, Norio, Nespral, David, Nowak, Grzegorz, Palle, Enric, Patzold, Martin, Rauer, Heike, Montanes Rodriguez, Pilar, Shectman, Stephen A., Smith, Alexis M. S., Thompson, Ian B., Van Eylen, Vincent, Williamson, Michael W. and Wittenmyer, Robert A. |
Journal Title | The Astronomical Journal |
Journal Citation | 154 (6), pp. 1-17 |
Article Number | 226 |
Number of Pages | 7 |
Year | Dec 2017 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/aa9065 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/aa9065 |
Abstract | We report the discovery of a new ultra-short-period planet and summarize the properties of all such planets for which the mass and radius have been measured. The new planet, K2-131b, was discovered in K2 Campaign 10. It has a radius of and orbits a G dwarf with a period of 8.9 hr. Radial velocities obtained with Magellan/PFS and TNG/HARPS-N show evidence for stellar activity along with orbital motion. We determined the planetary mass using two different methods: (1) the "floating chunk offset" method, based only on changes in velocity observed on the same night; and (2) a Gaussian process regression based on both the radial velocity and photometric time series. The results are consistent and lead to a mass measurement of and a mean density of g cm-3. |
Keywords | planetary systems; stars: individual (EPIC 228732031) |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | Massachusetts Institute of Technology, United States |
Princeton University, United States | |
University of Turin, Italy | |
Carnegie Institution for Science, United States | |
Aarhus University, Denmark | |
University of Texas at Austin, United States | |
University of Leiden, Netherlands | |
Chalmers University of Technology, Sweden | |
Karl Schwarzschild Observatory, Germany | |
Tokyo Institute of Technology, Japan | |
University of California Berkeley, United States | |
Ohio State University, United States | |
University of Tokyo, Japan | |
University of La Laguna, Spain | |
Institute of Astrophysics of the Canary Islands, Spain | |
Center for Astrophysics Harvard and Smithsonian, United States | |
German Aerospace Centre, Germany | |
INAF - Bologna Astronomical Observatory, Italy | |
National Optical Astronomy Observatory, United States | |
National Astronomical Observatory of Japan, Japan | |
University of Cologne, Germany | |
Tennessee State University, United States | |
NASA Ames Research Center, United States | |
Astrobiology Center, Japan | |
Center for Astronomy and Astrophysics, Germany | |
University of Southern Queensland |
https://research.usq.edu.au/item/y1849/the-discovery-and-mass-measurement-of-a-new-ultra-short-period-planet-k2-131b
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