| Autor: |
David W. Latham, Rhodes Hart, Richard P. Schwarz, Matías R. Díaz, Ryan Cloutier, George Zhou, Matthew W. Mengel, Felipe Rojas, George R. Ricker, Jeffrey D. Crane, Andrés Jordán, Joshua N. Winn, Jennifer Burt, Thomas Henning, Lizhou Sha, Brett C. Addison, Erin Snoddy, Jonathan Horner, Eric L. N. Jensen, Jack Okumura, Rafael Brahm, Christopher E. Henze, Holger Drass, Norio Narita, Ian J. M. Crossfield, Benjamin T. Montet, Peter Plavchan, Michael Vezie, John H. Livingston, Hui Zhang, Roland Vanderspek, Keivan G. Stassun, Carl Ziegler, Allyson Bieryla, Karen A. Collins, David Nespral, Thiam-Guan Tan, Stephen R. Kane, Kaloyan Penev, Louise D. Nielsen, Steven Villanueva, Akshata Krishnamurthy, Luigi Mancini, Robert A. Wittenmyer, Joel D. Hartman, Eric B. Ting, Andrew Vanderburg, G. Ottoni, Johanna Teske, John F. Kielkopf, Sara Seager, Knicole D. Colón, Janis Hagelberg, Mauro Barbieri, A. Zapata, Duncan J. Wright, Chelsea X. Huang, François Bouchy, Stéphane Udry, Elisabeth Matthews, Andrew W. Mann, Paula Sarkis, Sharon X. Wang, Jon M. Jenkins, Diana Dragomir, Motohide Tamura, Pascal Torres, Gáspár Á. Bakos, Joseph E. Rodriguez, Daniel Bayliss, Avi Shporer, Néstor Espinoza, Adina D. Feinstein |
| Rok vydání: |
2021 |
| Předmět: |
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| DOI: |
10.17615/vc1x-3x69 |
| Popis: |
We report the discovery of two short-period Saturn-mass planets, one transiting the G subgiant TOI-954 (TIC 44792534, $ V = 10.343 $, $ T = 9.78 $) observed in TESS sectors 4 and 5, and one transiting the G dwarf K2-329 (EPIC 246193072, $ V = 12.70 $, $ K = 10.67 $) observed in K2 campaigns 12 and 19. We confirm and characterize these two planets with a variety of ground-based archival and follow-up observations, including photometry, reconnaissance spectroscopy, precise radial velocity, and high-resolution imaging. Combining all available data, we find that TOI-954 b has a radius of $0.852_{-0.062}^{+0.053} \, R_{\mathrm{J}}$ and a mass of $0.174_{-0.017}^{+0.018} \, M_{\mathrm{J}}$ and is in a 3.68 day orbit, while K2-329 b has a radius of $0.774_{-0.024}^{+0.026} \, R_{\mathrm{J}}$ and a mass of $0.260_{-0.022}^{+0.020} \, M_{\mathrm{J}}$ and is in a 12.46 day orbit. As TOI-954 b is 30 times more irradiated than K2-329 b but more or less the same size, these two planets provide an opportunity to test whether irradiation leads to inflation of Saturn-mass planets and contribute to future comparative studies that explore Saturn-mass planets at contrasting points in their lifetimes.
Comment: 28 pages, 9 figures, 11 tables, accepted by AJ, ancillary data also available at https://github.com/vulpicastor/toi954-data |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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