TOI-1231 b: A Temperate, Neptune-Sized Planet Transiting the Nearby M3 Dwarf NLTT 24399
| Autor: | Wenceslas Marie-Sainte, Xavier Bonfils, Ian J. M. Crossfield, Christopher J. Burke, François-Xavier Schmider, Fabo Feng, Stephen A. Shectman, Antonio García Muñoz, Tansu Daylan, Elisabeth Matthews, Keivan G. Stassun, Diana Dragomir, Zachory K. Berta-Thompson, Abdelkrim Agabi, Rachel A. Matson, Nicolas Crouzet, Bill Wohler, Roland Vanderspek, Jennifer Burt, Johanna Teske, Sara Seager, C. E. Brasseur, David Charbonneau, Djamel Mékarnia, George R. Ricker, Amaury H. M. J. Triaud, Chelsea X. Huang, John McCann, Joshua Pepper, Jason D. Eastman, Allison Youngblood, Jeffrey D. Crane, Eric E. Mamajek, Lyu Abe, Karen A. Collins, Carl Ziegler, Tristan Guillot, Laura Kreidberg, Paul Mollière, David R. Ciardi, Daniel J. Stevens, Marion Cointepas, David W. Latham, Richard P. Schwarz, Andrew W. Mann, Joshua E. Schlieder, Joshua N. Winn, Georgina Dransfield, Elise Furlan, Eric L. N. Jensen, Steven Villanueva, Joseph E. Rodriguez, Jon M. Jenkins, Steve B. Howell, Sharon X. Wang, Arvind F. Gupta, Nicholas M. Law, Nic Scott, Samuel Halverson, R. Paul Butler, J. M. Almenara, Thomas Barclay |
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| Přispěvatelé: | MIT Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology (MIT), Max-Planck-Institut für Astronomie (MPIA), Max-Planck-Gesellschaft, Technische Universität Berlin (TU), Harvard-Smithsonian Center for Astrophysics (CfA), Harvard University [Cambridge]-Smithsonian Institution, Joseph Louis LAGRANGE (LAGRANGE), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015 - 2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS), Smithsonian Institution-Harvard University [Cambridge], Université Côte d'Azur (UCA)-Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
[SDU.ASTR.EP]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Earth and Planetary Astrophysics [astro-ph.EP]
Radial velocity (1332) FOS: Physical sciences Astrophysics::Cosmology and Extragalactic Astrophysics 01 natural sciences law.invention 010309 optics Telescope Neptune law Planet Observatory 0103 physical sciences Transit photometry (1709) Astrophysics::Solar and Stellar Astrophysics 010303 astronomy & astrophysics ComputingMilieux_MISCELLANEOUS Astrophysics::Galaxy Astrophysics Earth and Planetary Astrophysics (astro-ph.EP) Physics [SDU.ASTR.SR]Sciences of the Universe [physics]/Astrophysics [astro-ph]/Solar and Stellar Astrophysics [astro-ph.SR] Exoplanets (498) Astrophysics::Instrumentation and Methods for Astrophysics Astronomy Astronomy and Astrophysics Orbital period Exoplanet Radial velocity Planetary science 13. Climate action Space and Planetary Science [SDU]Sciences of the Universe [physics] Planetary system formation (1257) Astrophysics::Earth and Planetary Astrophysics Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | The Astronomical Journal The Astronomical Journal, American Astronomical Society, 2021, 162 (3), pp.87. ⟨10.3847/1538-3881/ac0432⟩ |
| ISSN: | 0004-6256 1538-3881 |
| DOI: | 10.3847/1538-3881/ac0432⟩ |
| Popis: | We report the discovery of a transiting, temperate, Neptune-sized exoplanet orbiting the nearby ($d$ = 27.5 pc), M3V star TOI-1231 (NLTT 24399, L 248-27, 2MASS J10265947-5228099). The planet was detected using photometric data from the Transiting Exoplanet Survey Satellite and followed up with observations from the Las Cumbres Observatory and the Antarctica Search for Transiting ExoPlanets program. Combining the photometric data sets, we find that the newly discovered planet has a radius of 3.65$^{+0.16}_{-0.15}$ R$_{\oplus}$, and an orbital period of 24.246 days. Radial velocity measurements obtained with the Planet Finder Spectrograph on the Magellan Clay telescope confirm the existence of the planet and lead to a mass measurement of 15.5$\pm$3.3 M$_{\oplus}$. With an equilibrium temperature of just 330K TOI-1231 b is one of the coolest small planets accessible for atmospheric studies thus far, and its host star's bright NIR brightness (J=8.88, K$_{s}$=8.07) make it an exciting target for HST and JWST. Future atmospheric observations would enable the first comparative planetology efforts in the 250-350 K temperature regime via comparisons with K2-18 b. Furthermore, TOI-1231's high systemic radial velocity (70.5 k\ms) may allow for the detection of low-velocity hydrogen atoms escaping the planet by Doppler shifting the H I Ly-alpha stellar emission away from the geocoronal and ISM absorption features. 20 pages, 9 figures. Accepted for publication in The Astronomical Journal |
| Databáze: | OpenAIRE |
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