TOI 560: Two Transiting Planets Orbiting a K Dwarf Validated with iSHELL, PFS, and HIRES RVs
Article
Article Title | TOI 560: Two Transiting Planets Orbiting a K Dwarf Validated with iSHELL, PFS, and HIRES RVs |
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ERA Journal ID | 1048 |
Article Category | Article |
Authors | El Mufti, Mohammed, Plavchan, Peter P., Isaacson, Howard, Cale, Bryson L., Feliz, Dax L., Reefe, Michael A., Hellier, Coel, Stassun, Keivan, Eastman, Jason, Polanski, Alex, Crossfield, Ian J. M., Gaidos, Eric, Kostov, Veselin, Wittrock, Wittrock, Villaseñor, Joel, Schlieder, Joshua E., Bouma, Luke G., Collins, Kevin, I, Zohrabi, Farzaneh, Lee, Rena A., Sohani, Ahmad, Berberian, John, Vermilion, David, Newman, Patrick, Geneser, Claire, Tanner, Angelle, Batalha, Natalie M., Dressing, Courtney, Fulton, Benjamin, Howard, Andrew W., Huber, Daniel, Kane, Stephen R., Petigura, Erik A., Robertson, Paul, Roy, Arpita, Weiss, Lauren M., Behmard, Aida, Beard, Corey, Chontos, Ashley, Dai, Fei, Dalba, Paul A., Fetherolf, Tara, Giacalone, Steven, Hill, Michelle L., Hirsch, Lea A., Holcomb, Rae, Lubin, Jack, Mayo, Andrew, Mocnik, Teo, Akana Murphy, Joseph M. Akana, Rosenthal, Lee J., Rubenzahl, Ryan A., Scarsdale, Nicholas, Stockdale, Christopher, Collins, Karen, Cloutier, Ryan, Relles, Howard, Tan, Thiam-Guan, Scott, Nicholas J., Hartman, Zach, Matthews, Elisabeth, Ciardi, David R., Gonzales, Erica, Matson, Rachel A., Beichman, Charles, Bieryla, Allyson, Furlan, E., Gnilka, Crystal L., Howell, Steve B., Ziegler, Carl, Briceno, Cesar, Law, Nicholas, Mann, Andrew W., Rabus, Markus, Johnson, Marshall C., Christiansen, Jessie, Kreidberg, Laura, Berardo, David Anthony, Deming, Deming, Gorjian, Varoujan, Morales, Farisa Y., Benneke, Bjorn, Dragomir, Diana, Wittenmyer, Robert A., Ballard, Sarah, Bowler, Brendan P., Horner, Jonathan, Kielkopf, John, Liu, Liu, Shporer, Shporer, Tinney, C. G., Zhang, Hui, Duncan, Duncan J., Addison, Brett C., Mengel, Matthew W. and Okumura, Jack |
Journal Title | The Astronomical Journal |
Journal Citation | 165 (1), pp. 1-49 |
Article Number | 10 |
Number of Pages | 49 |
Year | 01 Jan 2023 |
Publisher | IOP Publishing |
Place of Publication | United States |
ISSN | 0004-6256 |
1538-3881 | |
Digital Object Identifier (DOI) | https://doi.org/10.3847/1538-3881/ac9834 |
Web Address (URL) | https://iopscience.iop.org/article/10.3847/1538-3881/ac9834 |
Abstract | We validate the presence of a two-planet system orbiting the 0.15-1.4 Gyr K4 dwarf TOI 560 (HD 73583). The system consists of an inner moderately eccentric transiting mini-Neptune (TOI 560 b, P = 6.3980661 − 0.0000097 + 0.0000095 days, e = 0.294 − 0.062 + 0.13 , M = 0.94 − 0.23 + 0.31 M Nep ) initially discovered in the Sector 8 Transiting Exoplanet Survey Satellite (TESS) mission observations, and a transiting mini-Neptune (TOI 560 c, P = 18.8805 − 0.0011 + 0.0024 days, M = 1.32 − 0.32 + 0.29 M Nep ) discovered in the Sector 34 observations, in a rare near-1:3 orbital resonance. We utilize photometric data from TESS Spitzer, and ground-based follow-up observations to confirm the ephemerides and period of the transiting planets, vet false-positive scenarios, and detect the photoeccentric effect for TOI 560 b. We obtain follow-up spectroscopy and corresponding precise radial velocities (RVs) with the iSHELL spectrograph at the NASA Infrared Telescope Facility and the HIRES Spectrograph at Keck Observatory to validate the planetary nature of these signals, which we combine with published Planet Finder Spectrograph RVs from the Magellan Observatory. We detect the masses of both planets at >3σ significance. We apply a Gaussian process (GP) model to the TESS light curves to place priors on a chromatic RV GP model to constrain the stellar activity of the TOI 560 host star, and confirm a strong wavelength dependence for the stellar activity demonstrating the ability of near-IR RVs to mitigate stellar activity for young K dwarfs. TOI 560 is a nearby moderately young multiplanet system with two planets suitable for atmospheric characterization with the James Webb Space Telescope and other upcoming missions. In particular, it will undergo six transit pairs separated by <6 hr before 2027 June. |
Contains Sensitive Content | Does not contain sensitive content |
ANZSRC Field of Research 2020 | 510109. Stellar astronomy and planetary systems |
Byline Affiliations | George Mason University, United States |
University of Khartoum, Sudan | |
University of California Berkeley, United States | |
Centre for Astrophysics | |
Infrared Processing and Analysis Center (IPAC), United States | |
California Institute of Technology (Caltech), United States | |
Vanderbilt University, United States | |
Keele University, United Kingdom | |
Center for Astrophysics Harvard and Smithsonian, United States | |
University of Kansas, United States | |
University of Hawaii, United States | |
NASA Goddard Space Flight Center, United States | |
Massachusetts Institute of Technology, United States | |
Princeton University, United States | |
Louisiana State University, United States | |
Mississippi State University, United States | |
University of California, United States | |
NASA Exoplanet Science Institute, United States | |
Space Telescope Science Institute, United States | |
Johns Hopkins University, United States | |
University of Notre Dame, United States | |
Stanford University, United States | |
Gemini Observatory, United States | |
Hazelwood Observatory, Australia | |
Perth Exoplanet Survey Telescope Observatory, Australia | |
Curtin University | |
NASA Ames Research Center, United States | |
University of Geneva, Switzerland | |
United States Naval Observatory, United States | |
Stephen F. Austin State University, United States | |
Cerro Tololo Inter-American Observatory, Chile | |
University of North Carolina, United States | |
Catholic University of the Most Holy Conception (UCSC), Chile | |
Ohio State University, United States | |
School of Mathematics, Physics and Computing | |
Max Planck Institute for Astronomy, Germany | |
University of Maryland, United States | |
University of Montreal, Canada | |
University of New Mexico, United States | |
University of Florida, United States | |
University of Texas at Austin, United States | |
University of Louisville, United States | |
Nanjing University, China | |
University of New South Wales | |
Chinese Academy of Sciences, China |
https://research.usq.edu.au/item/y3wqv/toi-560-two-transiting-planets-orbiting-a-k-dwarf-validated-with-ishell-pfs-and-hires-rvs
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