A nearby M star with three transiting super-earths discovered by K2
Article
Article Title | A nearby M star with three transiting super-earths discovered by K2 |
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ERA Journal ID | 1057 |
Article Category | Article |
Authors | Crossfield, Ian J. M. (Author), Petigura, Erik (Author), Schlieder, Joshua E. (Author), Howard, Andrew W. (Author), Fulton, B. J. (Author), Aller, Kimberly M. (Author), Ciardi, David R. (Author), Lepine, Sebastien (Author), Barclay, Thomas (Author), de Pater, Imke (Author), de Kleer, Katherine (Author), Quintana, Elisa V. (Author), Schlafly, Eddie (Author), Christiansen, Jessie L. (Author), Kaltenegger, Lisa (Author), Crepp, Justin R. (Author), Henning, Thomas (Author), Obermeier, Christian (Author), Deacon, Niall (Author), Weiss, Lauren M. (Author), Isaacson, Howard T. (Author), Hansen, Brad M. S. (Author), Liu, Michael C. (Author), Greene, Tom (Author), Howell, Steve B. (Author), Barman, Travis (Author) and Mordasini, Christoph (Author) |
Journal Title | The Astrophysical Journal: an international review of astronomy and astronomical physics |
Journal Citation | 804 (1), pp. 10-17 |
Article Number | 10 |
Number of Pages | 8 |
Year | 2015 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-637X |
1538-4357 | |
Digital Object Identifier (DOI) | https://doi.org/10.1088/0004-637X/804/1/10 |
Web Address (URL) | http://iopscience.iop.org/article/10.1088/0004-637X/804/1/10 |
Abstract | Small, cool planets represent the typical end-products of planetary formation. Studying the architectures of these systems, measuring planet masses and radii, and observing these planets' atmospheres during transit directly informs theories of planet assembly, migration, and evolution. Here we report the discovery of three small planets orbiting a bright (Ks = 8.6 mag) M0 dwarf using data collected as part of K2, the new ecliptic survey using the re-purposed Kepler spacecraft. Stellar spectroscopy and K2 photometry indicate that the system hosts three transiting planets with radii 1.5-2.1 , straddling the transition region between rocky and increasingly volatile-dominated compositions. With orbital periods of 10-45 days the planets receive just 1.5-10x the flux incident on Earth, making these some of the coolest small planets known orbiting a nearby star; planet d is located near the inner edge of the system's habitable zone. The bright, low-mass star makes this system an excellent laboratory to determine the planets' masses via Doppler spectroscopy and to constrain their atmospheric compositions via transit spectroscopy. This discovery demonstrates the ability of K2 and future space-based transit searches to find many fascinating objects of interest. |
Keywords | eclipses; stars: individual (EPIC 201367065); tar.gz file; techniques: photometric; techniques: spectroscopic Supporting material: data behind figure; |
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 Arizona, United States |
University of California, United States | |
National Aeronautics and Space Administration (NASA), United States | |
University of Hawaii, United States | |
Georgia State University, United States | |
Max Planck Society, Germany | |
California Institute of Technology (Caltech), United States | |
Cornell University, United States | |
University of Notre Dame, United States | |
University of Hertfordshire, United Kingdom | |
NASA Ames Research Center, United States |
https://research.usq.edu.au/item/q4304/a-nearby-m-star-with-three-transiting-super-earths-discovered-by-k2
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