A Super-Earth and Sub-Neptune Transiting the Late-type M Dwarf LP 791-18
Article
Article Title | A Super-Earth and Sub-Neptune Transiting the Late-type M Dwarf LP 791-18 |
---|---|
ERA Journal ID | 45091 |
Article Category | Article |
Authors | Crossfield, Ian J. M. (Author), Waalkes, William (Author), Newton, Elisabeth R. (Author), Narita, Norio (Author), Muirhead, Philip (Author), Ment, Kristo (Author), Matthews, Elisabeth (Author), Kraus, Adam (Author), Kostov, Veselin (Author), Kosiarek, Molly R. (Author), Kane, Stephen R. (Author), Isaacson, Howard (Author), Halverson, Sam (Author), Gonzales, Erica (Author), Everett, Mark (Author), Dragomir, Diana (Author), Collins, Karen A. (Author), Chontos, Ashley (Author), Berardo, David (Author), Winters, Jennifer G. (Author), Winn, Joshua N. (Author), Scott, Nicholas J. (Author), Rojas-Ayala, Barbara (Author), Rizzuto, Aaron C. (Author), Petigura, Erik A. (Author), Peterson, Merrin (Author), Mocnik, Teo (Author), Mikal-Evans, Thomas (Author), Mehrle, Nicholas (Author), Matson, Rachel (Author), Kuzuhara, Masayuki (Author), Irwin, Jonathan (Author), Huber, Daniel (Author), Huang, Chelsea (Author), Howell, Steve (Author), Howard, Andrew W. (Author), Hirano, Teruyuki (Author), Fulton, Benjamin J. (Author), Dupuy, Trent (Author), Dressing, Courtney D. (Author), Dalba, Paul A. (Author), Charbonneau, David (Author), Burt, Jennifer (Author), Berta-Thompson, Zachory (Author), Benneke, Bjorn (Author), Watanabe, Noriharu (Author), Twicken, Joseph D. (Author), Tamura, Motohide (Author), Schlieder, Joshua (Author), Seager, S. (Author), Rose, Mark E. (Author), Ricker, George (Author), Quintana, Elisa (Author), Lepine, Sebastien (Author), Latham, David W. (Author), Kotani, Takayuki (Author), Jenkins, Jon M. (Author), Hori, Yasunori (Author), Colon, Knicole (Author) and Caldwell, Douglas A. (Author) |
Journal Title | The Astrophysical Journal Letters |
Journal Citation | 883 (1), pp. 1-13 |
Article Number | L16 |
Number of Pages | 13 |
Year | 2019 |
Publisher | IOP Publishing |
Place of Publication | United Kingdom |
ISSN | 2041-8205 |
2041-8213 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/2041-8213/ab3d30 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/2041-8213/ab3d30 |
Abstract | Planets occur most frequently around cool dwarfs, but only a handful of specific examples are known to orbit the latest-type M stars. Using TESS photometry, we report the discovery of two planets transiting the low-mass star called LP 791-18 (identified by TESS as TOI 736). This star has spectral type M6V, effective temperature 2960 K, and radius 0.17 R o, making it the third-coolest star known to host planets. The two planets straddle the radius gap seen for smaller exoplanets; they include a 1.1R ⊕ planet on a 0.95 day orbit and a 2.3R ⊕ planet on a 5 day orbit. Because the host star is small the decrease in light during these planets' transits is fairly large (0.4% and 1.7%). This has allowed us to detect both planets' transits from ground-based photometry, refining their radii and orbital ephemerides. In the future, radial velocity observations and transmission spectroscopy can both probe these planets' bulk interior and atmospheric compositions, and additional photometric monitoring would be sensitive to even smaller transiting planets. |
Keywords | Exoplanet astronomy; Exoplanet systems; High resolution spectroscopy; Low mass stars; Transit photometry; 486; 484; 2096; 2050; 1709; Astrophysics - Earth and Planetary Astrophysics |
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 | Massachusetts Institute of Technology, United States |
University of Colorado Boulder, United States | |
Dartmouth College, United States | |
National Astronomical Observatory of Japan, Japan | |
Boston University, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
University of Texas at Austin, United States | |
National Aeronautics and Space Administration (NASA), United States | |
University of California, United States | |
Centre for Astrophysics | |
National Optical Astronomy Observatory, United States | |
University of Hawaii, United States | |
Princeton University, United States | |
NASA Ames Research Center, United States | |
Andres Bello National University, Chile | |
California Institute of Technology (Caltech), United States | |
University of Montreal, Canada | |
Astrobiology Center, Japan | |
Tokyo Institute of Technology, Japan | |
Gemini Observatory, United States | |
NASA Goddard Space Flight Center, United States | |
Georgia State University, United States | |
SETI Institute, United States |
https://research.usq.edu.au/item/q7266/a-super-earth-and-sub-neptune-transiting-the-late-type-m-dwarf-lp-791-18
Download files
122
total views54
total downloads3
views this month0
downloads this month