KELT-23Ab: A Hot Jupiter Transiting a Near-solar Twin Close to the TESS and JWST Continuous Viewing Zones

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Johns, Daniel ^[1] ; Reed, Phillip A. ^[1] ; Rodriguez, Joseph E. ^[2] ; Pepper, Joshua ^[3] ; Stassun, Keivan G. ^{[4, 5]} ; Penev, Kaloyan ^[6] ; Gaudi, B. Scott ^[7] ; Labadie-Bartz, Jonathan ^{[8, 9]} ; Fulton, Benjamin J. ^[10] ; Quinn, Samuel N. ^[2] ; Eastman, Jason D. ^[2] ; Ciardi, David R. ^[10] ; Hirsch, Lea ^[11] ; Stevens, Daniel J. ^{[12, 13]} ; Stevens, Catherine P. ^[14] ; Oberst, Thomas E. ^[14] ; Cohen, David H. ^[15] ; Jensen, Eric L. N. ^[15] ; Benni, Paul ^[16] ; Villanueva, Jr., Steven ^[7] ; Murawsh, Gabriel ^[17] ; Bieryla, Allyson ^[2] ; Latham, David W. ^[2] ; Vanaverbeke, Siegfried ^[18] ; Dubois, Franky ^[18] ; Rau, Steve ^[18] ; Logie, Ludwig ^[18] ; Rauenzahn, Ryan F. ^[1] ; Wittenmyer, Robert A. ^[19] ; Zambelli, Roberto ^[20] ; Bayliss, Daniel ^{[21, 22]} ; Beatty, Thomas G. ^{[23, 13, 24]} ; Collins, Karen A. ^[2] ; Colon, Knicole D. ^[25] ; Curtis, Ivan A. ^[26] ; Evans, Phil ^[27] ; Gregorio, Joao ^{[28, 29]} ; James, David ^[30] ; Depoy, D. L. ^{[31, 32]} ; Johnson, Marshall C. ^[7] ; Joner, Michael D. ^[33] ; Kasper, David H. ^[34] ; Khakpash, Somayeh ^[3] ; Kielkopf, John F. ^[35] ; Kuhn, Rudolf B. ^{[36, 37]} ; Lund, Michael B. ^{[4, 10]} ; Manner, Mark ^[38] ; Marshall, Jennifer L. ^{[31, 32]} ; McLeod, Kim K. ^[39] ; Penny, Matthew T. ^[7] ; Relles, Howard ^[2] ; Siverd, Robert J. ^[4] ; Stephens, Denise C. ^[33] ; Stockdale, Chris ^[40] ; Tan, Thiam-Guan ^[41] ; Trueblood, Mark ^[42] ; Trueblood, Pat ^[42] ; Yao, Xinyu ^[3]

Afiliação do(s) autor(es):Mostrar menos -

^[1] Kutztown State Univ, Dept Phys Sci, Kutztown, PA 19530 - USA

^[2] Harvard & Smithsonian, Ctr Astrophys, 60 Garden Steet, Cambridge, MA 02138 - USA

^[3] Lehigh Univ, Dept Phys, 16 Mem Dr East, Bethlehem, PA 18015 - USA

^[4] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 - USA

^[5] Fisk Univ, Dept Phys, 1000 17th Ave North, Nashville, TN 37208 - USA

^[6] Univ Texas Dallas, Dept Phys, 800 West Campbell Rd, Richardson, TX 75080 - USA

^[7] Ohio State Univ, Dept Astron, 140 West 18th Ave, Columbus, OH 43210 - USA

^[8] Univ Delaware, Dept Phys & Astron, Newark, DE 19716 - USA

^[9] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226, Cidade Univ, BR-05508900 Sao Paulo, SP - Brazil

^[10] CALTECH, IPAC NExScI, Pasadena, CA 91125 - USA

^[11] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, Stanford, CA 94305 - USA

^[12] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 - USA

^[13] Penn State Univ, Ctr Exoplanets & Habitable Worlds, 525 Davey Lab, University Pk, PA 16802 - USA

^[14] Westminster Coll, Dept Phys, New Wilmington, PA 16172 - USA

^[15] Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 - USA

^[16] Acton Sky Portal, Private Observ, Acton, MA 01720 - USA

^[17] Gabriel Murawski Private Observ, Suwalki - Poland

^[18] Provinciaal Domein De Palingbeek, AstroLAB Iris, Verbrandemolenstr 5, B-8902 Zillebeke, Leper - Belgium

^[19] Univ Southern Queensland, Ctr Astrophys, West St, Toowoomba, Qld 4350 - Australia

^[20] Societa Astron Lunae, La Spezia - Italy

^[21] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands - England

^[22] Australian Natl Univ, Mt Stromlo Observ, Res Sch Astron & Astrophys, Cotter Rd, Weston, ACT 2611 - Australia

^[23] Univ Arizona, Steward Observ, Tucson, AZ 85721 - USA

^[24] Univ Arizona, Dept Astron, Tucson, AZ 85721 - USA

^[25] NASA, Goddard Space Flight Ctr, Exoplanets & Stellar Astrophys Lab, Code 667, Greenbelt, MD 20771 - USA

^[26] Ivan Curtis Private Observ, Adelaide, SA - Australia

^[27] El Sauce Observ, Rio Hurtado - Chile

^[28] Atalaia Grp, Portalegre - Portugal

^[29] CROW Observ, Portalegre - Portugal

^[30] Harvard & Smithsonian, Ctr Astrophys, Event Horizon Telescope, MS-42, 60 Garden St, Cambridge, MA 02138 - USA

^[31] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 - USA

^[32] Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 - USA

^[33] Brigham Young Univ, Dept Phys & Astron, Provo, UT 84602 - USA

^[34] Univ Wyoming, Dept Phys & Astron, 1000 E Univ Ave, Dept 3905, Laramie, WY 82071 - USA

^[35] Univ Louisville, Dept Phys & Astron, Louisville, KY 40292 - USA

^[36] South African Astron Observ, POB 9, ZA-7935 Cape Town - South Africa

^[37] Southern African Large Telescope, POB 9, ZA-7935 Cape Town - South Africa

^[38] Spot Observ, Nashville, TN 37206 - USA

^[39] Wellesley Coll, Dept Astron, Wellesley, MA 02481 - USA

^[40] Hazelwood Observ, Churchill, Vic - Australia

^[41] Perth Exoplanet Survey Telescope, Perth, WA - Australia

^[42] Winer Observ, POB 797, Sonoita, AZ 85637 - USA

• Tipo de documento: Artigo Científico
• Fonte: ASTRONOMICAL JOURNAL; v. 158, n. 2 AUG 2019.
• Citações Web of Science: 0

Resumo

We announce the discovery of KELT-23Ab, a hot Jupiter transiting the relatively bright (V = 10.3) star BD+66 911 (TYC 4187-996-1), and characterize the system using follow-up photometry and spectroscopy. A global fit to the system yields host-star properties of T-eff = 5900 +/- 49 K, M{*} = 0.945(-0.054)(+0.060) M-circle dot, R{*} = 0.995 +/- 0.015 R-circle dot, L{*} = 1.082(-0.048)(+0.051) L-circle dot, log g{*} = 4.418(-0.025)(+0.026). (cgs), and {[}Fe/H] = -0.105 +/- 0.077. KELT-23Ab is a hot Jupiter with a mass of M-p = 0.938(-0.042)(+0.045). M-J, radius of R-p = 1.322 0.025 R-J, and density of rho(p) = 0.504(0.035)(+0.038) g cm(-3). Intense insolation flux from the star has likely caused KELT-23Ab to become inflated. The time of inferior conjunction is T-0 = 2458149.40776 +/- 0.00091 BJD(TDB) and the orbital period is P = 2.255353(-0.000030)(+0.000031) ON days. There is strong evidence that KELT-23A is a member of a long-period binary star system with a less luminous companion, and due to tidal interactions, the planet is likely to spiral into its host within roughly a gigayear. This system has one of the highest positive ecliptic latitudes of all transiting planet hosts known to date, placing it near the Transiting Planet Survey Satellite and James Webb Space Telescope continuous viewing zones. Thus we expect it to be an excellent candidate for long-term monitoring and follow up with these facilities. (AU)

• Processo FAPESP: 17/23731-1 - Análise e Modelagem de uma Grande Amostra de Estrelas Be Galácticas
• Beneficiário: Jonathan Michael Labadie-Bartz
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado