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

Joseph E. Rodriguez; Jason D. Eastman; George Zhou; Samuel N. Quinn; Thomas G. Beatty; Kaloyan Penev; Marshall C. Johnson; Phillip A. Cargile; David W. Latham; Allyson Bieryla; Karen A. Collins; Courtney D. Dressing; David R. Ciardi; Howard M. Relles; Gabriel Murawski; Taku Nishiumi; Atsunori Yonehara; Ryo Ishimaru; Fumi Yoshida; Joao Gregorio; Michael B. Lund; Daniel J. Stevens; Keivan G. Stassun; B. Scott Gaudi; Knicole D. Colón; Joshua Pepper; Norio Narita; Supachai Awiphan; Pongpichit Chuanraksasat; Paul Benni; Roberto Zambelli; Lehman H. Garrison; Maurice L. Wilson; Matthew A. Cornachione; Sharon X. Wang; Jonathan Labadie-Bartz; Romy Rodríguez; Robert J. Siverd; Xinyu Yao; Daniel Bayliss; Perry Berlind; Michael L. Calkins; Jessie L. Christiansen; David H. Cohen; Dennis M. Conti; Ivan A. Curtis; D. L. Depoy; Gilbert A. Esquerdo; Phil Evans; Dax Feliz; Benjamin J. Fulton; Thomas W.S. Holoien; David J. James; Tharindu Jayasinghe; Hannah Jang-Condell; Eric L.N. Jensen; John A. Johnson; Michael D. Joner; Somayeh Khakpash; John F. Kielkopf; Rudolf B. Kuhn; Mark Manner; Jennifer L. Marshall; Kim K. McLeod; Nate McCrady; Thomas E. Oberst; Ryan J. Oelkers; Matthew T. Penny; Phillip A. Reed; David H. Sliski; B. J. Shappee; Denise C. Stephens; Chris Stockdale; Thiam Guan Tan; Mark Trueblood; Pat Trueblood; Steven Villanueva; Robert A. Wittenmyer; Jason T. Wright

doi:10.3847/1538-3881/ab4136

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

Joseph E. Rodriguez
, Jason D. Eastman
, George Zhou
, Samuel N. Quinn
, Thomas G. Beatty
, Kaloyan Penev
, Marshall C. Johnson
, Phillip A. Cargile
, David W. Latham
, Allyson Bieryla
, Karen A. Collins
, Courtney D. Dressing
, David R. Ciardi
, Howard M. Relles
, Gabriel Murawski
, Taku Nishiumi
, Atsunori Yonehara
, Ryo Ishimaru
, Fumi Yoshida
, Joao Gregorio

Michael B. Lund, Daniel J. Stevens, Keivan G. Stassun, B. Scott Gaudi, Knicole D. Colón, Joshua Pepper, Norio Narita, Supachai Awiphan, Pongpichit Chuanraksasat, Paul Benni, Roberto Zambelli, Lehman H. Garrison, Maurice L. Wilson, Matthew A. Cornachione, Sharon X. Wang, Jonathan Labadie-Bartz, Romy Rodríguez, Robert J. Siverd, Xinyu Yao, Daniel Bayliss, Perry Berlind, Michael L. Calkins, Jessie L. Christiansen, David H. Cohen, Dennis M. Conti, Ivan A. Curtis, D. L. Depoy, Gilbert A. Esquerdo, Phil Evans, Dax Feliz, Benjamin J. Fulton, Thomas W.S. Holoien, David J. James, Tharindu Jayasinghe, Hannah Jang-Condell, Eric L.N. Jensen, John A. Johnson, Michael D. Joner, Somayeh Khakpash, John F. Kielkopf, Rudolf B. Kuhn, Mark Manner, Jennifer L. Marshall, Kim K. McLeod, Nate McCrady, Thomas E. Oberst, Ryan J. Oelkers, Matthew T. Penny, Phillip A. Reed, David H. Sliski, B. J. Shappee, Denise C. Stephens, Chris Stockdale, Thiam Guan Tan, Mark Trueblood, Pat Trueblood, Steven Villanueva, Robert A. Wittenmyer, Jason T. Wright

Steward Observatory

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

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_-⁺₄₉⁵⁰ K, a mass of M_* = 1.460_-⁺_0.059^0.055 M_e, a radius of R_* = 1.506 ± 0.022 R_e, 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 (l = 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.

Original language	English (US)
Article number	197
Journal	Astronomical Journal
Volume	158
Issue number	5
DOIs	https://doi.org/10.3847/1538-3881/ab4136
State	Published - Nov 2019

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-3881/ab4136

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Rodriguez, J. E., Eastman, J. D., Zhou, G., Quinn, S. N., Beatty, T. G., Penev, K., Johnson, M. C., Cargile, P. A., Latham, D. W., Bieryla, A., Collins, K. A., Dressing, C. D., Ciardi, D. R., Relles, H. M., Murawski, G., Nishiumi, T., Yonehara, A., Ishimaru, R., Yoshida, F., ... Wright, J. T. (2019). KELT-24b: A 5M_J Planet on a 5.6day Well-aligned Orbit around the Young V = 8.3 F-star HD 93148. Astronomical Journal, 158(5), Article 197. https://doi.org/10.3847/1538-3881/ab4136

Rodriguez, JE, Eastman, JD, Zhou, G, Quinn, SN, Beatty, TG, Penev, K, Johnson, MC, Cargile, PA, Latham, DW, Bieryla, A, Collins, KA, Dressing, CD, Ciardi, DR, Relles, HM, Murawski, G, Nishiumi, T, Yonehara, A, Ishimaru, R, Yoshida, F, Gregorio, J, Lund, MB, Stevens, DJ, Stassun, KG, Scott Gaudi, B, Colón, KD, Pepper, J, Narita, N, Awiphan, S, Chuanraksasat, P, Benni, P, Zambelli, R, Garrison, LH, Wilson, ML, Cornachione, MA, Wang, SX, Labadie-Bartz, J, Rodríguez, R, Siverd, RJ, Yao, X, Bayliss, D, Berlind, P, Calkins, ML, Christiansen, JL, Cohen, DH, Conti, DM, Curtis, IA, Depoy, DL, Esquerdo, GA, Evans, P, Feliz, D, Fulton, BJ, Holoien, TWS, James, DJ, Jayasinghe, T, Jang-Condell, H, Jensen, ELN, Johnson, JA, Joner, MD, Khakpash, S, Kielkopf, JF, Kuhn, RB, Manner, M, Marshall, JL, McLeod, KK, McCrady, N, Oberst, TE, Oelkers, RJ, Penny, MT, Reed, PA, Sliski, DH, Shappee, BJ, Stephens, DC, Stockdale, C, Tan, TG, Trueblood, M, Trueblood, P, Villanueva, S, Wittenmyer, RA & Wright, JT 2019, 'KELT-24b: A 5M_J Planet on a 5.6day Well-aligned Orbit around the Young V = 8.3 F-star HD 93148', Astronomical Journal, vol. 158, no. 5, 197. https://doi.org/10.3847/1538-3881/ab4136

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title = "KELT-24b: A 5MJ Planet on a 5.6day Well-aligned Orbit around the Young V = 8.3 F-star HD 93148",

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 Teff = 6509-+4950 K, a mass of M* = 1.460-+0.0590.055 Me, a radius of R* = 1.506 ± 0.022 Re, and an age of 0.78-+0.420.61 Gyr. Its planetary companion (KELT-24 b) has a radius of RP = 1.272 ± 0.021 RJ and a mass of MP = 5.18-+0.220.21 MJ, and from Doppler tomographic observations, we find that the planet{\textquoteright}s orbit is well-aligned to its host star{\textquoteright}s projected spin axis (l = 2.6-+3.65.1). 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.",

author = "Rodriguez, \{Joseph E.\} and Eastman, \{Jason D.\} and George Zhou and Quinn, \{Samuel N.\} and Beatty, \{Thomas G.\} and Kaloyan Penev and Johnson, \{Marshall C.\} and Cargile, \{Phillip A.\} and Latham, \{David W.\} and Allyson Bieryla and Collins, \{Karen A.\} and Dressing, \{Courtney D.\} and Ciardi, \{David R.\} and Relles, \{Howard M.\} and Gabriel Murawski and Taku Nishiumi and Atsunori Yonehara and Ryo Ishimaru and Fumi Yoshida and Joao Gregorio and Lund, \{Michael B.\} and Stevens, \{Daniel J.\} and Stassun, \{Keivan G.\} and \{Scott Gaudi\}, B. and Col{\'o}n, \{Knicole D.\} and Joshua Pepper and Norio Narita and Supachai Awiphan and Pongpichit Chuanraksasat and Paul Benni and Roberto Zambelli and Garrison, \{Lehman H.\} and Wilson, \{Maurice L.\} and Cornachione, \{Matthew A.\} and Wang, \{Sharon X.\} and Jonathan Labadie-Bartz and Romy Rodr{\'i}guez and Siverd, \{Robert J.\} and Xinyu Yao and Daniel Bayliss and Perry Berlind and Calkins, \{Michael L.\} and Christiansen, \{Jessie L.\} and Cohen, \{David H.\} and Conti, \{Dennis M.\} and Curtis, \{Ivan A.\} and Depoy, \{D. L.\} and Esquerdo, \{Gilbert A.\} and Phil Evans and Dax Feliz and Fulton, \{Benjamin J.\} and Holoien, \{Thomas W.S.\} and James, \{David J.\} and Tharindu Jayasinghe and Hannah Jang-Condell and Jensen, \{Eric L.N.\} and Johnson, \{John A.\} and Joner, \{Michael D.\} and Somayeh Khakpash and Kielkopf, \{John F.\} and Kuhn, \{Rudolf B.\} and Mark Manner and Marshall, \{Jennifer L.\} and McLeod, \{Kim K.\} and Nate McCrady and Oberst, \{Thomas E.\} and Oelkers, \{Ryan J.\} and Penny, \{Matthew T.\} and Reed, \{Phillip A.\} and Sliski, \{David H.\} and Shappee, \{B. J.\} and Stephens, \{Denise C.\} and Chris Stockdale and Tan, \{Thiam Guan\} and Mark Trueblood and Pat Trueblood and Steven Villanueva and Wittenmyer, \{Robert A.\} and Wright, \{Jason T.\}",

year = "2019",

month = nov,

doi = "10.3847/1538-3881/ab4136",

language = "English (US)",

volume = "158",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "5",

}

TY - JOUR

T1 - KELT-24b

T2 - A 5MJ Planet on a 5.6day Well-aligned Orbit around the Young V = 8.3 F-star HD 93148

AU - Rodriguez, Joseph E.

AU - Eastman, Jason D.

AU - Zhou, George

AU - Quinn, Samuel N.

AU - Beatty, Thomas G.

AU - Penev, Kaloyan

AU - Johnson, Marshall C.

AU - Cargile, Phillip A.

AU - Latham, David W.

AU - Bieryla, Allyson

AU - Collins, Karen A.

AU - Dressing, Courtney D.

AU - Ciardi, David R.

AU - Relles, Howard M.

AU - Murawski, Gabriel

AU - Nishiumi, Taku

AU - Yonehara, Atsunori

AU - Ishimaru, Ryo

AU - Yoshida, Fumi

AU - Gregorio, Joao

AU - Lund, Michael B.

AU - Stevens, Daniel J.

AU - Stassun, Keivan G.

AU - Scott Gaudi, B.

AU - Colón, Knicole D.

AU - Pepper, Joshua

AU - Narita, Norio

AU - Awiphan, Supachai

AU - Chuanraksasat, Pongpichit

AU - Benni, Paul

AU - Zambelli, Roberto

AU - Garrison, Lehman H.

AU - Wilson, Maurice L.

AU - Cornachione, Matthew A.

AU - Wang, Sharon X.

AU - Labadie-Bartz, Jonathan

AU - Rodríguez, Romy

AU - Siverd, Robert J.

AU - Yao, Xinyu

AU - Bayliss, Daniel

AU - Berlind, Perry

AU - Calkins, Michael L.

AU - Christiansen, Jessie L.

AU - Cohen, David H.

AU - Conti, Dennis M.

AU - Curtis, Ivan A.

AU - Depoy, D. L.

AU - Esquerdo, Gilbert A.

AU - Evans, Phil

AU - Feliz, Dax

AU - Fulton, Benjamin J.

AU - Holoien, Thomas W.S.

AU - James, David J.

AU - Jayasinghe, Tharindu

AU - Jang-Condell, Hannah

AU - Jensen, Eric L.N.

AU - Johnson, John A.

AU - Joner, Michael D.

AU - Khakpash, Somayeh

AU - Kielkopf, John F.

AU - Kuhn, Rudolf B.

AU - Manner, Mark

AU - Marshall, Jennifer L.

AU - McLeod, Kim K.

AU - McCrady, Nate

AU - Oberst, Thomas E.

AU - Oelkers, Ryan J.

AU - Penny, Matthew T.

AU - Reed, Phillip A.

AU - Sliski, David H.

AU - Shappee, B. J.

AU - Stephens, Denise C.

AU - Stockdale, Chris

AU - Tan, Thiam Guan

AU - Trueblood, Mark

AU - Trueblood, Pat

AU - Villanueva, Steven

AU - Wittenmyer, Robert A.

AU - Wright, Jason T.

PY - 2019/11

Y1 - 2019/11

N2 - 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 Teff = 6509-+4950 K, a mass of M* = 1.460-+0.0590.055 Me, a radius of R* = 1.506 ± 0.022 Re, and an age of 0.78-+0.420.61 Gyr. Its planetary companion (KELT-24 b) has a radius of RP = 1.272 ± 0.021 RJ and a mass of MP = 5.18-+0.220.21 MJ, and from Doppler tomographic observations, we find that the planet’s orbit is well-aligned to its host star’s projected spin axis (l = 2.6-+3.65.1). 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.

AB - 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 Teff = 6509-+4950 K, a mass of M* = 1.460-+0.0590.055 Me, a radius of R* = 1.506 ± 0.022 Re, and an age of 0.78-+0.420.61 Gyr. Its planetary companion (KELT-24 b) has a radius of RP = 1.272 ± 0.021 RJ and a mass of MP = 5.18-+0.220.21 MJ, and from Doppler tomographic observations, we find that the planet’s orbit is well-aligned to its host star’s projected spin axis (l = 2.6-+3.65.1). 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.

UR - https://www.scopus.com/pages/publications/85091062708

UR - https://www.scopus.com/pages/publications/85091062708#tab=citedBy

U2 - 10.3847/1538-3881/ab4136

DO - 10.3847/1538-3881/ab4136

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JO - Astronomical Journal

JF - Astronomical Journal

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M1 - 197

ER -

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

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Radial velocities & light curves of KELT-24

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

Abstract

ASJC Scopus subject areas

Access to Document

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Radial velocities &amp; light curves of KELT-24

Cite this

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

Radial velocities & light curves of KELT-24