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TESS Spots a Compact System of Super-Earths around the Naked-eye Star HR 858

Vanderburg, Andrew; Huang, Chelsea X.; Rodriguez, Joseph E.; Becker, Juliette C.; Ricker, George R.; Vanderspek, Roland K.; Latham, David W.; Seager, Sara; Winn, Joshua N.; Jenkins, Jon M.; Addison, Brett; Bieryla, Allyson; Briceño, Cesar; Bowler, Brendan P.; Brown, Timothy M.; Burke, Christopher J.; Burt, Jennifer A.; Caldwell, Douglas A.; Clark, Jake T.; Crossfield, Ian; Dittmann, Jason A.; Dynes, Scott; Fulton, Benjamin J.; Guerrero, Natalia; Harbeck, Daniel; Horner, Jonathan; Kane, Stephen R.; Kielkopf, John; Kraus, Adam L.; Kreidberg, Laura; Law, Nicolas; Mann, Andrew W.; Mengel, Matthew W.; Morton, Timothy D.; Okumura, Jack; Pearce, Logan A.; Plavchan, Peter; Quinn, Samuel N.; Rabus, Markus; Rose, Mark E.; Rowden, Pam; Shporer, Avi; Siverd, Robert J.; Smith, Jeffrey C.; Stassun, Keivan; Tinney, C. G.; Wittenmyer, Rob; Wright, Duncan J.; Zhang, Hui; Zhou, George and Ziegler, Carl A. (2019). TESS Spots a Compact System of Super-Earths around the Naked-eye Star HR 858. The Astrophysical Journal, 881(1), article no. L19.

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Transiting Exoplanet Survey Satellite (TESS) observations have revealed a compact multiplanet system around the sixth-magnitude star HR 858 (TIC 178155732, TOI 396), located 32 pc away. Three planets, each about twice the size of Earth, transit this slightly evolved, late F-type star, which is also a member of a visual binary. Two of the planets may be in mean motion resonance. We analyze the TESS observations, using novel methods to model and remove instrumental systematic errors, and combine these data with follow-up observations taken from a suite of ground-based telescopes to characterize the planetary system. The HR 858 planets are enticing targets for precise radial velocity observations, secondary eclipse spectroscopy, and measurements of the Rossiter–McLaughlin effect.

Item Type: Journal Item
Copyright Holders: 2019 The American Astronomical Society
ISSN: 2041-8213
Keywords: planetary systems; planets and satellites: detection; stars: individual (HR 858, TIC 178155732)
Academic Unit/School: Faculty of Science, Technology, Engineering and Mathematics (STEM) > Physical Sciences
Faculty of Science, Technology, Engineering and Mathematics (STEM)
Item ID: 66383
Depositing User: ORO Import
Date Deposited: 04 Sep 2019 15:23
Last Modified: 05 Sep 2019 15:36
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