A sub-Neptune transiting the young field star HD 18599 at 40 pc
Article
de Leon, J P, Livingston, J H, Jenkins, J S, Vines, J I, Wittenmyer, R A, Clark, J. T, Winn, J I M, Addison, B, Ballard, S, Bayliss, D, Beichman, C, Benneke, B, Berardo, D A, Bowler, B P, Brown, T, Bryant, E M, Christiansen, J, Ciardi, D, Collins, K A, ..., Zhou, G. 2023. "A sub-Neptune transiting the young field star HD 18599 at 40 pc." Monthly Notices of the Royal Astronomical Society. 522 (1), pp. 750-766. https://doi.org/10.1093/mnras/stad894
| Article Title | A sub-Neptune transiting the young field star HD 18599 at 40 pc |
|---|---|
| ERA Journal ID | 1074 |
| Article Category | Article |
| Authors | de Leon, J P, Livingston, J H, Jenkins, J S, Vines, J I, Wittenmyer, R A, Clark, J. T, Winn, J I M, Addison, B, Ballard, S, Bayliss, D, Beichman, C, Benneke, B, Berardo, D A, Bowler, B P, Brown, T, Bryant, E M, Christiansen, J, Ciardi, D, Collins, K A, Collins, K I, Crossfield, I, Deming, D, Dragomir, D, Dressing, C D, Fukui, A, Gan, T, Giacalone, S, Gill, S, Gorjian, V, González Alvarez, E., Hesse, K, Horner, J, Howell, S B, Jenkins, J M, Kane, S R, Kendall, A, Kielkopf, J F, Kreidberg, L, Latham, D W, Liu, H, Lund, M B, Matson, R, Matthews, E, Mengel, M, Morales, F, Mori, M, Narita, N, Nishiumi, T, Okumura, J, Plavchan, P, Quinn, S, Rabus, M, Ricker, G, Rudat, A, Schlieder, J, Schwarz, R P, Seager, S, Shporer, A, Smith, A M S, Stassun, K, Tamura, M, Tan, T G, Tinney, C, Vanderspek, R, Werner, M W, West, R G, Wright, D, Zhang, H and Zhou, G |
| Journal Title | Monthly Notices of the Royal Astronomical Society |
| Journal Citation | 522 (1), pp. 750-766 |
| Number of Pages | 17 |
| Year | 2023 |
| Publisher | Oxford University Press |
| Place of Publication | United Kingdom |
| ISSN | 0035-8711 |
| 1365-2966 | |
| Digital Object Identifier (DOI) | https://doi.org/10.1093/mnras/stad894 |
| Web Address (URL) | https://academic.oup.com/mnras/article/522/1/750/7087283 |
| Abstract | Transiting exoplanets orbiting young nearby stars are ideal laboratories for testing theories of planet formation and evolution. However, to date only a handful of stars with age <1 Gyr have been found to host transiting exoplanets. Here we present the discovery and validation of a sub-Neptune around HD 18599 , a young (300 Myr), nearby (d = 40 pc) K star. We validate the transiting planet candidate as a bona fide planet using data from the TESS , Spitzer , and Gaia missions, ground-based photometry from IRSF , LCO , PEST , and NGTS , speckle imaging from Gemini, and spectroscopy from CHIRON , NRES , FEROS , and MINERVA-Australis . The planet has an orbital period of 4.13 d , and a radius of 2.7 R⊕ . The RV data yields a 3-σ mass upper limit of 30.5 M⊕ which is explained by either a massive companion or the large observed jitter typical for a young star. The brightness of the host star (V∼9 mag) makes it conducive to detailed characterization via Doppler mass measurement which will provide a rare view into the interior structure of young planets. |
| Keywords | planets and satellites: detection |
| ANZSRC Field of Research 2020 | 510107. Planetary science (excl. solar system and planetary geology) |
| Byline Affiliations | Tokyo University of Science, Japan |
| Astrobiology Center, Japan | |
| National Astronomical Observatory of Japan, Japan | |
| Graduate University for Advanced Studies, Japan | |
| Diego Portales University, Chile | |
| University of Chile, Chile | |
| Centre for Astrophysics | |
| Princeton University, United States | |
| University of Florida, United States | |
| University of Warwick, United Kingdom | |
| NASA Exoplanet Science Institute, United States | |
| University of Montreal, Canada | |
| Massachusetts Institute of Technology, United States | |
| University of Texas at Austin, United States | |
| University of Colorado Boulder, United States | |
| Las Cumbres Observatory, United States | |
| University College London, United Kingdom | |
| Center for Astrophysics Harvard and Smithsonian, United States | |
| George Mason University, United States | |
| University of Kansas, United States | |
| NASA Astrobiology Institute’s Virtual Planetary Laboratory, United States | |
| University of Maryland, United States | |
| University of New Mexico, United States | |
| University of California Berkeley, United States | |
| University of Tokyo, Japan | |
| Institute of Astrophysics of the Canary Islands, Spain | |
| Tsinghua University, China | |
| NASA Jet Propulsion Laboratory, United States | |
| Spanish Astrobiology Center, Spain | |
| Wesleyan University, United States | |
| NASA Ames Research Center, United States | |
| University of California, United States | |
| University of Leicester, United Kingdom | |
| University of Louisville, United States | |
| Nanjing University, China | |
| Geneva Observatory, Switzerland | |
| Las Cumbres Observatory Global Telescope Network, United States | |
| Catholic University of the Most Holy Conception (UCSC), Chile | |
| NASA Goddard Space Flight Center, United States | |
| German Aerospace Center (DLR), Germany | |
| Vanderbilt University, United States | |
| Fisk University, United States | |
| Perth Exoplanet Survey Telescope Observatory, Australia | |
| University of New South Wales | |
| Chinese Academy of Sciences, China |
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