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

Sam Christian Andrew Vanderburg Juliette Becker Daniel A. Yahalomi Logan Pearce George Zhou Karen A. Collins Adam L. Kraus Keivan G. Stassun Zoe de Beurs George R. Ricker Roland K. Vanderspek David W. Latham Joshua N. Winn S. Seager Jon M. Jenkins Lyu Abe 1 Karim Agabi 1 Pedro J. Amado David Baker Khalid Barkaoui Zouhair Benkhaldoun Paul Benni John Berberian Perry Berlind Allyson Bieryla Emma Esparza-Borges Michael Bowen Peyton Brown Lars A. Buchhave Christopher J. Burke Marco Buttu Charles Cadieux Douglas A. Caldwell David Charbonneau Nikita Chazov Sudhish Chimaladinne Kevin I. Collins Deven Combs Dennis M. Conti Nicolas Crouzet Jerome P. de Leon Shila Deljookorani Brendan Diamond René Doyon Diana Dragomir Georgina Dransfield Zahra Essack Phil Evans Akihiko Fukui Tianjun Gan Gilbert A. Esquerdo Michaël Gillon Eric Girardin Pere Guerra Tristan Guillot 1 Eleanor Kate K. Habich Andreea Henriksen Nora Hoch Keisuke I. Isogai Emmanuël Jehin Eric L. N. Jensen Marshall C. Johnson John H. Livingston John F. Kielkopf Kingsley Kim Kiyoe Kawauchi Vadim Krushinsky Veronica Kunzle Didier Laloum 2 Dominic Leger Pablo Lewin Franco Mallia Bob Massey Mayuko Mori Kim K. Mcleod Djamel Mékarnia 1 Ismael Mireles Nikolay Mishevskiy Motohide Tamura Felipe Murgas Norio Narita Ramon Naves Peter Nelson Hugh P. Osborn Enric Palle Hannu Parviainen Peter Plavchan Francisco J. Pozuelos Markus Rabus Howard M. Relles Cristina Rodríguez López Samuel N. Quinn Francois-Xavier Schmider 1 Joshua E. Schlieder Richard P. Schwarz Avi Shporer Laurie Sibbald Gregor Srdoc Caitlin Stibbards Hannah Stickler Olga Suarez 1 Chris Stockdale Thiam-Guan Tan Yuka Terada Amaury Triaud Rene Tronsgaard William C. Waalkes Gavin Wang Noriharu Watanabe Marie-Sainte Wenceslas Geof Wingham Justin Wittrock Carl Ziegler
Abstract : 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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Submitted on : Monday, May 2, 2022 - 7:24:32 PM
Last modification on : Tuesday, May 10, 2022 - 3:20:04 PM

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Sam Christian, Andrew Vanderburg, Juliette Becker, Daniel A. Yahalomi, Logan Pearce, et al.. A Possible Alignment Between the Orbits of Planetary Systems and their Visual Binary Companions. The Astronomical Journal, 2022, 163, ⟨10.3847/1538-3881/ac517f⟩. ⟨insu-03656895⟩

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