TOI-2076 and TOI-1807: Two Young, Comoving Planetary Systems within 50 pc Identified by TESS that are Ideal Candidates for Further Follow Up
Article
Article Title | TOI-2076 and TOI-1807: Two Young, Comoving Planetary Systems within 50 pc Identified by TESS that are Ideal Candidates for Further Follow Up |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | Hedges, Christina (Author), Hughes, Alex (Author), Zhou, George (Author), David, Trevor J. (Author), Becker, Juliette (Author), Giacalone, Steven (Author), Vanderburg, Andrew (Author), Rodriguez, Joseph E. (Author), Bieryla, Allyson (Author), Wirth, Christopher (Author), Atherton, Shaun (Author), Fetherolf, Tara (Author), Collins, Karen A. (Author), Price-Whelan, Adrian M. (Author), Bedell, Megan (Author), Quinn, Samuel N. (Author), Gan, Tianjun (Author), Ricker, George R. (Author), Latham, David W. (Author), Vanderspek, Roland K. (Author), Seager, Sara (Author), Winn, Joshua N. (Author), Jenkins, Jon M. (Author), Kielkopf, John F. (Author), Schwarz, Richard P. (Author), Dressing, Courtney D. (Author), Gonzales, Erica J. (Author), Crossfield, Ian J. M. (Author), Matthews, Elisabeth C. (Author), Jensen, Eric L. N. (Author), Furlan, Elise (Author), Gnilka, Crystal L. (Author), Howell, Steve B. (Author), Lester, Kathryn V. (Author), Scott, Nicholas J. (Author), Feliz, Dax L. (Author), Lund, Michael B. (Author), Siverd, Robert J. (Author), Stevens, Daniel J. (Author), Narita, N. (Author), Fukui, A. (Author), Murgas, F. (Author), Palle, Enric (Author), Sutton, Phil J. (Author), Stassun, Keivan G. (Author), Bouma, Luke G. (Author), Vezie, Michael (Author), Villasenor, Jesus Noel (Author), Quintana, Elisa V. (Author) and Smith, Jeffrey C. (Author) |
Journal Title | The Astronomical Journal |
Journal Citation | 162 (2), pp. 1-22 |
Article Number | 54 |
Number of Pages | 22 |
Year | 2021 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/ac06cd |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ac06cd |
Abstract | We report the discovery of two planetary systems around comoving stars: TOI-2076 (TIC 27491137) and TOI-1807 (TIC 180695581). TOI-2076 is a nearby (41.9 pc) multiplanetary system orbiting a young (204 ± 50 Myr), bright (K = 7.115 in TIC v8.1) start. TOI-1807 hosts a single transiting planet and is similarly nearby (42.58 pc), similarly young (180 ± 40 Myr ), and bright. Both targets exhibit significant, periodic variability due to starspots, characteristic of their young ages. Using photometric data collected by TESS we identify three transiting planets around TOI-2076 with radii of R b = 3.3 ± 0.04 R ⊕, R c = 4.4 ± 0.05 R ⊕, and R d = 4.1 ± 0.07 R ⊕. Planet TOI-2076b has a period of P b = 10.356 days. For both TOI-2076c and d, TESS observed only two transits, separated by a 2 yr interval in which no data were collected, preventing a unique period determination. A range of long periods (<17 days) are consistent with the data. We identify a short-period planet around TOI-1807 with a radius of R b = 1.8 ± 0.04 R ⊕ and a period of P b = 0.549 days. Their close proximity, and bright, cool host stars, and young ages make these planets excellent candidates for follow up. TOI-1807b is one of the best-known small (R < 2 R⊕) planets for characterization via eclipse spectroscopy and phase curves with JWST. TOI-1807b is the youngest ultra-short-period planet discovered to date, providing valuable constraints on formation timescales of short-period planets. Given the rarity of young planets, particularly in multiple-planet systems, these planets present an unprecedented opportunity to study and compare exoplanet formation, and young planet atmospheres, at a crucial transition age for formation theory. |
Keywords | Exoplanets; Transits; Time series analysis; Astrophysics - Earth and Planetary Astrophysics; Astrophysics -Instrumentation and Methods for Astrophysics |
Related Output | |
Is previous version of | Erratum: "TOI-2076 and TOI-1807: Two young, Comoving Planetary Systems within 50 pc Identified by TESS that are Ideal Candidates for Further Follow Up" |
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 | National Aeronautics and Space Administration (NASA), United States |
Loughborough University, United Kingdom | |
Centre for Astrophysics | |
Flatiron Institute, United States | |
California Institute of Technology (Caltech), United States | |
University of California, United States | |
University of Wisconsin-Madison, United States | |
Michigan State University, United States | |
Academic Registrar's Office | |
Harvard University, United States | |
Center for Astrophysics Harvard and Smithsonian, United States | |
Tsinghua University, China | |
Massachusetts Institute of Technology, United States | |
Harvard-Smithsonian Centre for Astrophysics, United States | |
Princeton University, United States | |
School of Mathematics, Physics and Computing | |
Patashnick Voorheesville Observatory, United States | |
University of Kansas, United States | |
University of Geneva, Switzerland | |
Swarthmore College, United States | |
NASA Ames Research Center, United States | |
Vanderbilt University, United States | |
Gemini Observatory, United States | |
Pennsylvania State University, United States | |
University of Tokyo, Japan | |
Institute of Astrophysics of the Canary Islands, Spain | |
University of Lincoln, United Kingdom | |
NASA Goddard Space Flight Center, United States | |
Funding source | Australian Research Council (ARC) Grant ID DE210101893 |
https://research.usq.edu.au/item/q6x41/toi-2076-and-toi-1807-two-young-comoving-planetary-systems-within-50-pc-identified-by-tess-that-are-ideal-candidates-for-further-follow-up
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