Search: onr:"swepub:oai:research.chalmers.se:22bd2f5d-2f7f-49b5-88d3-a27cedfa408b" >
It Takes Two Planet...
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Lam, Kristine W. F.Technische Universität Berlin
(author)
It Takes Two Planets in Resonance to Tango around K2-146
- Article/chapterEnglish2020
Publisher, publication year, extent ...
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2020-02-21
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American Astronomical Society,2020
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electronicrdacarrier
Numbers
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LIBRIS-ID:oai:research.chalmers.se:22bd2f5d-2f7f-49b5-88d3-a27cedfa408b
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https://research.chalmers.se/publication/516504URI
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https://doi.org/10.3847/1538-3881/ab66c9DOI
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https://research.chalmers.se/publication/518341URI
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https://research.chalmers.se/publication/515846URI
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https://research.chalmers.se/publication/524317URI
Supplementary language notes
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Language:English
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Summary in:English
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Classification
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Subject category:art swepub-publicationtype
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Subject category:ref swepub-contenttype
Notes
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K2-146 is a cool, 0.358M dwarf that was found to host a mini-Neptune with a 2.67 day period. The planet exhibited strong transit timing variations (TTVs) of greater than 30 minutes, indicative of the presence of an additional object in the system. Here we report the discovery of the previously undetected outer planet in the system, K2-146 c, using additional photometric data. K2-146 c was found to have a grazing transit geometry and a 3.97 day period. The outer planet was only significantly detected in the latter K2 campaigns presumably because of precession of its orbital plane. The TTVs of K2-146 b and c were measured using observations spanning a baseline of almost 1200 days. We found strong anti -correlation in the TTVs, suggesting the two planets are gravitationally interacting. Our TTV and transit model analyses revealed that K2-146 b has a radius of 2.25 0.10 Re and a mass of 5.6 0.7 Me, whereas K2-146 c has a radius of 2.591 Re and a mass of 7.1 0.9 Me. The inner and outer planets likely have moderate eccentricities of e = 0.14 0.07 and 0.16 0.07, respectively. Long-term numerical integrations of the two -planet orbital solution show that it can be dynamically stable for at least 2 Myr. We show that the resonance angles of the planet pair are librating, which may be an indication that K2-146 b and c are in a 3:2 mean motion resonance. The orbital architecture of the system points to a possible convergent migration origin.
Subject headings and genre
Added entries (persons, corporate bodies, meetings, titles ...)
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Korth, JudithUniversität zu Köln,University of Cologne
(author)
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Masuda, KentoPrinceton University
(author)
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Csizmadia, SzilardDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Eigmueller, PhilippDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Kari Stefansson, GumundurPennsylvania State University
(author)
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Endl, MichaelThe University of Texas at Austin, USA,The University of Texas at Austin, USA
(author)
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Albrecht, SimonÅrhus Universitet,Aarhus University
(author)
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Robertson, PaulPennsylvania State University
(author)
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Luque, RafaelUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
(author)
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Livingston, John H.University of Tokyo, Japan
(author)
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Hirano, TeruyukiTokyo Institute of Technology
(author)
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Alonso Sobrino, RoiUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
(author)
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Barragan, OscarUniversity Of Oxford
(author)
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Cabrera, JuanDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Carleo, IlariaWesleyan University
(author)
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Chaushev, AlexanderTechnische Universität Berlin
(author)
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Cochran, William D.The University of Texas at Austin, USA,The University of Texas at Austin, USA
(author)
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Dai, FeiMassachusetts Institute of Technology (MIT),Princeton University
(author)
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de Leon, JeromeUniversity of Tokyo, Japan
(author)
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Deeg, Hans J.Instituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
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Erikson, AndersDeutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Esposito, MassimilianoThüringer Landessternwarte Tautenburg,Technische Universität Berlin
(author)
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Fridlund, Malcolm,1952Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)malfri
(author)
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Fukui, AkihikoNational Institutes of Natural Sciences (NINS)
(author)
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Gandolfi, DavideUniversita degli Studi di Torino,University of Turin
(author)
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Georgieva, IskraChalmers tekniska högskola,Chalmers University of Technology
(author)
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Gonzalez Cuesta, LucaInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
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Grziwa, SaschaUniversität zu Köln,University of Cologne
(author)
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Guenther, Eike W.Thüringer Landessternwarte Tautenburg
(author)
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Hatzes, Artie P.Thüringer Landessternwarte Tautenburg
(author)
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Hidalgo, DiegoUniversidad de la Laguna,University of La Laguna,Instituto de Astrofísica de Canarias
(author)
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Hjorth, MariaÅrhus Universitet,Aarhus University
(author)
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Kabath, PetrCzech Academy of Sciences
(author)
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Knudstrup, EmilÅrhus Universitet,Aarhus University
(author)
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Lund, Mikkel N.Århus Universitet,Aarhus University
(author)
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Mahadevan, SuvrathPennsylvania State University
(author)
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Mathur, SavitaInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
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Montanes Rodriguez, PilarInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
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Murgas, FelipeInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
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Narita, NorioNational Institutes of Natural Sciences (NINS),Instituto de Astrofísica de Canarias,Japan Science and Technology Agency (JST)
(author)
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Nespral, DavidInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
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Niraula, PrajwalMassachusetts Institute of Technology (MIT)
(author)
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Palle, EnricInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
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Paetzold, MartinUniversität zu Köln,University of Cologne
(author)
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Persson, Carina,1964Chalmers tekniska högskola,Chalmers University of Technology(Swepub:cth)carina64
(author)
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Prieto-Arranz, JorgeInstituto de Astrofísica de Canarias,Universidad de la Laguna,University of La Laguna
(author)
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Rauer, HeikeTechnische Universität Berlin,Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR),Freie Universität Berlin
(author)
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Redfield, SethWesleyan University
(author)
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Ribas, IgnasiInstitut d'Estudis Espacials de Catalunya (IEEC),Institute of Space Studies of Catalonia (IEEC),Agencia Estatal Consejo Superior de Investigaciones Científicas,Spanish National Research Council
(author)
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Skarka, MarekCzech Academy of Sciences,Masarykova Univerzita,Masaryk University
(author)
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Smith, Alexis M. S.Deutsches Zentrums für Luft- und Raumfahrt (DLR),German Aerospace Center (DLR)
(author)
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Subjak, JanCzech Academy of Sciences,Univerzita Karlova,Charles University
(author)
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Van Eylen, VincentUniversity College London (UCL),Princeton University
(author)
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Technische Universität BerlinUniversität zu Köln
(creator_code:org_t)
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In:Astronomical Journal: American Astronomical Society159:31538-38810004-6256
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Lam, Kristine W. ...
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Korth, Judith
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Masuda, Kento
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Csizmadia, Szila ...
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Eigmueller, Phil ...
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Kari Stefansson, ...
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Endl, Michael
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Albrecht, Simon
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Barragan, Oscar
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Dai, Fei
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de Leon, Jerome
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Deeg, Hans J.
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Erikson, Anders
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Fukui, Akihiko
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