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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

KELT-24b: A 5M(J) Planet on a 5.6 day Well-aligned Orbit around the Young V=8.3 F-star HD 93148

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Author(s):
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Rodriguez, Joseph E. [1] ; Eastman, Jason D. [1] ; Zhou, George [1] ; Quinn, Samuel N. [1] ; Beatty, Thomas G. [2] ; Penev, Kaloyan [3] ; Johnson, Marshall C. [4] ; Cargile, Phillip A. [1] ; Latham, David W. [1] ; Bieryla, Allyson [1] ; Collins, Karen A. [1] ; Dressing, Courtney D. [5] ; Ciardi, David R. [6] ; Relles, Howard M. [1] ; Murawski, Gabriel [7] ; Nishiumi, Taku [8, 9] ; Yonehara, Atsunori [9] ; Ishimaru, Ryo [10] ; Yoshida, Fumi [10] ; Gregorio, Joao [11, 12] ; Lund, Michael B. [6] ; Stevens, Daniel J. [13, 14] ; Stassun, Keivan G. [15, 16] ; Gaudi, B. Scott [4] ; Colon, Knicole D. [17] ; Pepper, Joshua [18] ; Narita, Norio [8, 19, 20, 21] ; Awiphan, Supachai [22] ; Chuanraksasat, Pongpichit [22] ; Benni, Paul [23] ; Zambelli, Roberto [24] ; Garrison, Lehman H. [1] ; Wilson, Maurice L. [1] ; Cornachione, Matthew A. [25, 26] ; Wang, Sharon X. [27] ; Labadie-Bartz, Jonathan [28] ; Rodriguez, Romy [4] ; Siverd, Robert J. [15] ; Yao, Xinyu [18] ; Bayliss, Daniel [29, 30] ; Berlind, Perry [1] ; Calkins, Michael L. [1] ; Christiansen, Jessie L. [6] ; Cohen, David H. [31] ; Conti, Dennis M. [32] ; Curtis, Ivan A. [33] ; Depoy, D. L. [34, 35] ; Esquerdo, Gilbert A. [1] ; Evans, Phil [36] ; Feliz, Dax [15] ; Fulton, Benjamin J. [6] ; Holoien, Thomas W. S. [37] ; James, David J. [38, 1] ; Jayasinghe, Tharindu [4] ; Jang-Condell, Hannah [39] ; Jensen, Eric L. N. [31] ; Johnson, John A. [1] ; Joner, Michael D. [40] ; Khakpash, Somayeh [18] ; Kielkopf, John F. [41] ; Kuhn, Rudolf B. [42, 43] ; Manner, Mark [44] ; Marshall, Jennifer L. [34, 35] ; McLeod, Kim K. [45] ; McCrady, Nate [46] ; Oberst, Thomas E. [47] ; Oelkers, Ryan J. [15] ; Penny, Matthew T. [4] ; Reed, Phillip A. [48] ; Sliski, David H. [49] ; Shappee, B. J. [50] ; Stephens, Denise C. [40] ; Stockdale, Chris [51] ; Tan, Thiam-Guan [52] ; Trueblood, Mark [53] ; Trueblood, Pat [53] ; Villanueva, Jr., Steven [54, 55] ; Wittenmyer, Robert A. [56] ; Wright, Jason T. [13, 14]
Total Authors: 79
Affiliation:
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[1] Ctr Astrophys Harvard & Smithsonian, 60 Garden St, Cambridge, MA 02138 - USA
[2] Univ Arizona, Dept Astron & Steward Observ, Tucson, AZ 85721 - USA
[3] Univ Texas Dallas, Dept Phys, 800 West Campbell Rd, Richardson, TX 75080 - USA
[4] Ohio State Univ, Dept Astron, 140 West 18th Ave, Columbus, OH 43210 - USA
[5] Univ Calif Berkeley, Dept Astron, Berkeley, CA 94720 - USA
[6] CALTECH, IPAC, NASA, Exoplanet Sci Inst, 1200 E Calif Ave, Pasadena, CA 91125 - USA
[7] Gabriel Murawski Private Observ SOTES, Suwalki - Poland
[8] Natl Astron Observ Japan, 2-21-1 Osawa, Mitaka, Tokyo 1818588 - Japan
[9] Kyoto Sangyo Univ, Fac Sci, Dept Phys, Kita Ku, Kyoto 6038555 - Japan
[10] Chiba Inst Technol, Planetary Explorat Res Ctr, 2-17-1 Tsudanuma, Narashino, Chiba 2750016 - Japan
[11] Atalaia Grp, Portalegre - Portugal
[12] CROW Observ, Portalegre - Portugal
[13] Penn State Univ, Dept Astron & Astrophys, 525 Davey Lab, University Pk, PA 16802 - USA
[14] Penn State Univ, Ctr Exoplanets & Habitable Worlds, 525 Davey Lab, University Pk, PA 16802 - USA
[15] Vanderbilt Univ, Dept Phys & Astron, Nashville, TN 37235 - USA
[16] Fisk Univ, Dept Phys, 1000 17th Ave North, Nashville, TN 37208 - USA
[17] NASA, Goddard Space Flight Ctr, Exoplanets & Stellar Astrophys Lab, Code 667, Greenbelt, MD 20771 - USA
[18] Lehigh Univ, Dept Phys, 16 Mem Dr East, Bethlehem, PA 18015 - USA
[19] IAC, E-38205 Tenerife - Spain
[20] Astrobiol Ctr, 2-21-1 Osawa, Mitaka, Tokyo 1818588 - Japan
[21] JST, PRESTO, 2-21-1 Osawa, Mitaka, Tokyo 1818588 - Japan
[22] Natl Astron Res Inst Thailand, 260, Moo 4, Chiang Mai 50180 - Thailand
[23] Acton Sky Portal Private Observ, Acton, MA 01720 - USA
[24] Soc Astron Lunae, Sarzana - Italy
[25] Univ Utah, Dept Phys & Astron, 115 South 1400 East, Salt Lake City, UT 84112 - USA
[26] US Naval Acad, Dept Phys, 572C Holloway Rd, Annapolis, MD 21402 - USA
[27] Carnegie Inst Sci, Dept Terr Magnetism, 5241 Broad Branch Rd NW, Washington, DC 20015 - USA
[28] Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Rua Matao 1226, Cidade Univ, BR-05508900 Sao Paulo, SP - Brazil
[29] Univ Warwick, Dept Phys, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands - England
[30] Univ Warwick, Ctr Exoplanets & Habitabil, Gibbet Hill Rd, Coventry CV4 7AL, W Midlands - England
[31] Swarthmore Coll, Dept Phys & Astron, Swarthmore, PA 19081 - USA
[32] Amer Assoc Variable Star Observers, 49 Bay State Rd, Cambridge, MA 02138 - USA
[33] Ivan Curtis Private Observ, Toowoomba, Qld - Australia
[34] Texas A&M Univ, Dept Phys & Astron, College Stn, TX 77843 - USA
[35] Texas A&M Univ, George P & Cynthia Woods Mitchell Inst Fundamenta, College Stn, TX 77843 - USA
[36] El Sauce Observ, Rio Hurtado, Coquimbo - Chile
[37] Observ Carnegie Inst Sci, 813 Santa Barbara St, Pasadena, CA 91101 - USA
[38] Harvard Univ, Black Hole Initiat, 20 Garden St, Cambridge, MA 02138 - USA
[39] Univ Wyoming, Dept Phys & Astron, 1000 E Univ Ave, Dept 3905, Laramie, WY 82071 - USA
[40] Brigham Young Univ, Dept Phys & Astron, Provo, UT 84602 - USA
[41] Univ Louisville, Dept Phys & Astron, Louisville, KY 40292 - USA
[42] South African Astron Observ, POB 9, ZA-7935 Cape Town - South Africa
[43] Southern African Large Telescope, POB 9, ZA-7935 Cape Town - South Africa
[44] Spot Observ, Nashville, TN 37206 - USA
[45] Wellesley Coll, Dept Astron, Wellesley, MA 02481 - USA
[46] Univ Montana, Dept Phys & Astron, 32 Campus Dr, 1080, Missoula, MT 59812 - USA
[47] Westminster Coll, Dept Phys, New Wilmington, PA 16172 - USA
[48] Kutztown State Univ, Dept Phys Sci, Kutztown, PA 19530 - USA
[49] Univ Penn, Dept Phys & Astron, Philadelphia, PA 19104 - USA
[50] Univ Hawaii, Inst Astron, 2680 Woodlawn Dr, Honolulu, HI 96822 - USA
[51] Hazelwood Observ, Churchill, Vic - Australia
[52] Perth Exoplanet Survey Telescope, Perth, WA - Australia
[53] Winer Observ, POB 797, Sonoita, AZ 85637 - USA
[54] MIT, Dept Phys, Cambridge, MA 02139 - USA
[55] MIT, Kavli Inst Astrophys & Space Res, 77 Massachusetts Ave, Cambridge, MA 02139 - USA
[56] Univ Southern Queensland, Ctr Astrophys, West St, Toowoomba, Qld 4350 - Australia
Total Affiliations: 56
Document type: Journal article
Source: ASTRONOMICAL JOURNAL; v. 158, n. 5 NOV 2019.
Web of Science Citations: 0
Abstract

We present the discovery of KELT-24 b, a massive hot Jupiter orbiting a bright (V = 8.3 mag, K = 7.2 mag) young F-star with a period of 5.6 days. The host star, KELT-24 (HD 93148), has a T-eff = 6509(-49)(+50) K, a mass of M-{*} = 1.460(-0.059)(+0.055) M-circle dot, a radius of R-{*} = 1.506 +/- 0.022 R-circle dot, and an age of 0.78(-0.42)(+0.61) Gyr. Its planetary companion (KELT-24 b) has a radius of R-P = 1.272 +/- 0.021 R-J and a mass of M-P = 5.18(-0.22)(+0.21) M-J, and from Doppler tomographic observations, we find that the planet's orbit is well-aligned to its host star's projected spin axis (lambda = 2.6(-3.6)(+5.1)). The young age estimated for KELT-24 suggests that it only recently started to evolve from the zero-age main sequence. KELT-24 is the brightest star known to host a transiting giant planet with a period between 5 and 10 days. Although the circularization timescale is much longer than the age of the system, we do not detect a large eccentricity or significant misalignment that is expected from dynamical migration. The brightness of its host star and its moderate surface gravity make KELT-24b an intriguing target for detailed atmospheric characterization through spectroscopic emission measurements since it would bridge the current literature results that have primarily focused on lower mass hot Jupiters and a few brown dwarfs. (AU)

FAPESP's process: 17/23731-1 - Analysis and Modeling of a Large Sample of Galactic Be Stars
Grantee:Jonathan Michael Labadie-Bartz
Support type: Scholarships in Brazil - Post-Doctorate