A Possible Alignment Between the Orbits of Planetary Systems and their Visual Binary Companions

Christian, Sam and Vanderburg, Andrew and Becker, Juliette and Yahalomi, Daniel A. and Pearce, Logan and Zhou, George ORCID: https://orcid.org/0000-0002-4891-3517 and Collins, Karen A. and Kraus, Adam L. and Stassun, Keivan G. and de Beurs, Zoe and Ricker, George R. and Vanderspek, Roland K. and Latham, David W. and Winn, Joshua N. and Seager, S. and Jenkins, Jon M. and Abe, Lyu and Agabi, Karim and Amado, Pedro J. and Baker, David and Barkaoui, Khalid and Benkhaldoun, Zouhair and Benni, Paul and Berberian, John and Berlind, Perry and Bieryla, Allyson and Esparza-Borges, Emma and Bowen, Michael and Brown, Peyton and Buchhave, Lars A. and Burke, Christopher J. and Buttu, Marco and Cadieux, Charles and Caldwell, Douglas A. and Charbonneau, David and Chazov, Nikita and Chimaladinne, Sudhish and Collins, Kevin I. and Combs, Deven and Conti, Dennis M. and Crouzet, Nicolas and de Leon, Jerome P. and Deljookorani, Shila and Diamond, Brendan and Doyon, Rene and Dragomir, Diana and Dransfield, Georgina and Essack, Zahra and Evans, Phil and Fukui, Akihiko and Gan, Tianjun and Esquerdo, Gilbert A. and Gillon, Michael and Girardin, Eric and Guerra, Pere and Guillot, Tristan and Habich, Eleanor Kate K. and Henriksen, Andreea and Hoch, Nora and Isogai, Keisuke I. and Jehin, Emmanuel and Jensen, Eric L. N. and Johnson, Marshall C. and Livingston, John H. and Kielkopf, John F. and Kim, Kingsley and Kawauchi, Kiyoe and Krushinsky, Vadim and Kunzle, Veronica and Laloum, Didier and Leger, Dominic and Lewin, Pablo and Mallia, Franco and Massey, Bob and Mori, Mayuko and McLeod, Kim K. and Mekarnia, Djamel and Mireles, Ismael and Mishevskiy, Nikolay and Tamura, Motohide and Murgas, Felipe and Narita, Norio and Naves, Ramon and Nelson, Peter and Osborn, Hugh P. and Palle, Enric and Parviainen, Hannu and Plavchan, Peter and Pozuelos, Francisco J. and Rabus, Markus and Relles, Howard M. and Lopez, Cristina Rodriguez and Quinn, Samuel N. and Schmider, Francois-Xavier and Schlieder, Joshua E. and Schwarz, Richard P. and Shporer, Avi and Sibbald, Laurie and Srdoc, Gregor and Stibbards, Caitlin and Stickler, Hannah and Suarez, Olga and Stockdale, Chris and Tan, Thiam-Guan and Terada, Yuka and Triaud, Amaury and Tronsgaard, Rene and Waalkes, William C. and Wang, Gavin and Watanabe, Noriharu and Wenceslas, Marie-Sainte and Wingham, Geof and Wittrock, Justin and Ziegler, Carl (2022) A Possible Alignment Between the Orbits of Planetary Systems and their Visual Binary Companions. The Astronomical Journal, 163 (5):207. pp. 1-26. ISSN 0004-6256

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Astronomers do not have a complete picture of the effects of wide-binary companions (semimajor axes greater than 100 au) on the formation and evolution of exoplanets. We investigate these effects using new data from Gaia Early Data Release 3 and the Transiting Exoplanet Survey Satellite mission to characterize wide-binary systems with transiting exoplanets. We identify a sample of 67 systems of transiting exoplanet candidates (with well-determined, edge-on orbital inclinations) that reside in wide visual binary systems. We derive limits on orbital parameters for the wide-binary systems and measure the minimum difference in orbital inclination between the binary and planet orbits. We determine that there is statistically significant difference in the inclination distribution of wide-binary systems with transiting planets compared to a control sample, with the probability that the two distributions are the same being 0.0037. This implies that there is an overabundance of planets in binary systems whose orbits are aligned with those of the binary. The overabundance of aligned systems appears to primarily have semimajor axes less than 700 au. We investigate some effects that could cause the alignment and conclude that a torque caused by a misaligned binary companion on the protoplanetary disk is the most promising explanation.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Faculty/School / Institute/Centre: Current - Institute for Advanced Engineering and Space Sciences - Centre for Astrophysics (1 Aug 2018 -)
Date Deposited: 12 May 2022 04:26
Last Modified: 09 Jun 2022 03:37
Uncontrolled Keywords: Star-planet interactions; Circumstellar disks; Exoplanet evolution; Wide binary stars; Visual binary stars; Astrophysics - Earth and Planetary Astrophysics; Astrophysics - Solar and Stellar Astrophysics
Fields of Research (2020): 51 PHYSICAL SCIENCES > 5101 Astronomical sciences > 510109 Stellar astronomy and planetary systems
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280120 Expanding knowledge in the physical sciences
Funding Details:
Identification Number or DOI: https://doi.org/10.3847/1538-3881/ac517f
URI: http://eprints.usq.edu.au/id/eprint/48449

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