Kelt-4Ab

An inflated hot jupiter transiting the bright (V ∼ 10) component of a hierarchical triple

Jason D. Eastman, Thomas Beatty, Robert J. Siverd, Joseph M.O. Antognini, Matthew T. Penny, Erica J. Gonzales, Justin R. Crepp, Andrew W. Howard, Ryan L. Avril, Allyson Bieryla, Karen Collins, Benjamin J. Fulton, Jian Ge, Joao Gregorio, Bo Ma, Samuel N. Mellon, Thomas E. Oberst, Ji Wang, B. Scott Gaudi, Joshua Pepper & 25 others Keivan G. Stassun, Lars A. Buchhave, Eric L.N. Jensen, David W. Latham, Perry Berlind, Michael L. Calkins, Phillip A. Cargile, Knicole D. Colón, Saurav Dhital, Gilbert A. Esquerdo, John Asher Johnson, John F. Kielkopf, Mark Manner, Qingqing Mao, Kim K. McLeod, Kaloyan Penev, Robert P. Stefanik, Rachel Street, Roberto Zambelli, D. L. DePoy, Andrew Gould, Jennifer L. Marshall, Richard W. Pogge, Mark Trueblood, Patricia Trueblood

Research output: Contribution to journalArticle

16 Citations (Scopus)

Abstract

We report the discovery of KELT-4Ab, an inflated, transiting Hot Jupiter orbiting the brightest component of ahierarchical triple stellar system. The host star is an F star with Teff =6206 ± 75 K, log g =4.108 ± 0.014, [Fe/H]= -0.116+0.069+0.065, M = 1.201-0.061+0.067 M, and R = 1.603-0.038+0.039 R. The best-fit linear ephemeris is BJDTDB =2456193.29157±0.00021 + E(2.9895936±0.0000048). With a magnitude of V∼10, a planetary radius of 1.699-0.045+0.046 RJ, and a mass of 0.902-0.059+0.060 MJ, it is the brightest host among the population of inflated Hot Jupiters (RP > 1.5RJ), making it a valuable discovery for probing the nature of inflated planets. In addition, its existence within a hierarchical triple and its proximity to Earth (210 pc) provide a unique opportunity for dynamical studies with continued monitoring with high resolution imaging and precision radial velocities. The projected separation between KELT-4A and KELT-4BC is 328±16 AU and the projected separation between KELT-4B and KELT-4C is 10.30±0.74 AU. Assuming face-on, circular orbits, their respective periods would be 3780±290 and 29.4±3.6 years and the astrometric motions relative to the epoch in this work of both the binary stars around each other and of the binary around the primary star would be detectable now and may provide meaningful constraints on the dynamics of the system.

Original languageEnglish (US)
Article number45
JournalAstronomical Journal
Volume151
Issue number2
DOIs
StatePublished - Feb 1 2016

Fingerprint

Jupiter (planet)
Jupiter
F stars
stars
stellar systems
binary stars
circular orbits
radial velocity
proximity
planets
planet
time measurement
radii
high resolution
monitoring

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Eastman, J. D., Beatty, T., Siverd, R. J., Antognini, J. M. O., Penny, M. T., Gonzales, E. J., ... Trueblood, P. (2016). Kelt-4Ab: An inflated hot jupiter transiting the bright (V ∼ 10) component of a hierarchical triple. Astronomical Journal, 151(2), [45]. https://doi.org/10.3847/0004-6256/151/2/45
Eastman, Jason D. ; Beatty, Thomas ; Siverd, Robert J. ; Antognini, Joseph M.O. ; Penny, Matthew T. ; Gonzales, Erica J. ; Crepp, Justin R. ; Howard, Andrew W. ; Avril, Ryan L. ; Bieryla, Allyson ; Collins, Karen ; Fulton, Benjamin J. ; Ge, Jian ; Gregorio, Joao ; Ma, Bo ; Mellon, Samuel N. ; Oberst, Thomas E. ; Wang, Ji ; Gaudi, B. Scott ; Pepper, Joshua ; Stassun, Keivan G. ; Buchhave, Lars A. ; Jensen, Eric L.N. ; Latham, David W. ; Berlind, Perry ; Calkins, Michael L. ; Cargile, Phillip A. ; Colón, Knicole D. ; Dhital, Saurav ; Esquerdo, Gilbert A. ; Johnson, John Asher ; Kielkopf, John F. ; Manner, Mark ; Mao, Qingqing ; McLeod, Kim K. ; Penev, Kaloyan ; Stefanik, Robert P. ; Street, Rachel ; Zambelli, Roberto ; DePoy, D. L. ; Gould, Andrew ; Marshall, Jennifer L. ; Pogge, Richard W. ; Trueblood, Mark ; Trueblood, Patricia. / Kelt-4Ab : An inflated hot jupiter transiting the bright (V ∼ 10) component of a hierarchical triple. In: Astronomical Journal. 2016 ; Vol. 151, No. 2.
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title = "Kelt-4Ab: An inflated hot jupiter transiting the bright (V ∼ 10) component of a hierarchical triple",
abstract = "We report the discovery of KELT-4Ab, an inflated, transiting Hot Jupiter orbiting the brightest component of ahierarchical triple stellar system. The host star is an F star with Teff =6206 ± 75 K, log g =4.108 ± 0.014, [Fe/H]= -0.116+0.069+0.065, M∗ = 1.201-0.061+0.067 M⊙, and R∗ = 1.603-0.038+0.039 R⊙. The best-fit linear ephemeris is BJDTDB =2456193.29157±0.00021 + E(2.9895936±0.0000048). With a magnitude of V∼10, a planetary radius of 1.699-0.045+0.046 RJ, and a mass of 0.902-0.059+0.060 MJ, it is the brightest host among the population of inflated Hot Jupiters (RP > 1.5RJ), making it a valuable discovery for probing the nature of inflated planets. In addition, its existence within a hierarchical triple and its proximity to Earth (210 pc) provide a unique opportunity for dynamical studies with continued monitoring with high resolution imaging and precision radial velocities. The projected separation between KELT-4A and KELT-4BC is 328±16 AU and the projected separation between KELT-4B and KELT-4C is 10.30±0.74 AU. Assuming face-on, circular orbits, their respective periods would be 3780±290 and 29.4±3.6 years and the astrometric motions relative to the epoch in this work of both the binary stars around each other and of the binary around the primary star would be detectable now and may provide meaningful constraints on the dynamics of the system.",
author = "Eastman, {Jason D.} and Thomas Beatty and Siverd, {Robert J.} and Antognini, {Joseph M.O.} and Penny, {Matthew T.} and Gonzales, {Erica J.} and Crepp, {Justin R.} and Howard, {Andrew W.} and Avril, {Ryan L.} and Allyson Bieryla and Karen Collins and Fulton, {Benjamin J.} and Jian Ge and Joao Gregorio and Bo Ma and Mellon, {Samuel N.} and Oberst, {Thomas E.} and Ji Wang and Gaudi, {B. Scott} and Joshua Pepper and Stassun, {Keivan G.} and Buchhave, {Lars A.} and Jensen, {Eric L.N.} and Latham, {David W.} and Perry Berlind and Calkins, {Michael L.} and Cargile, {Phillip A.} and Col{\'o}n, {Knicole D.} and Saurav Dhital and Esquerdo, {Gilbert A.} and Johnson, {John Asher} and Kielkopf, {John F.} and Mark Manner and Qingqing Mao and McLeod, {Kim K.} and Kaloyan Penev and Stefanik, {Robert P.} and Rachel Street and Roberto Zambelli and DePoy, {D. L.} and Andrew Gould and Marshall, {Jennifer L.} and Pogge, {Richard W.} and Mark Trueblood and Patricia Trueblood",
year = "2016",
month = "2",
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doi = "10.3847/0004-6256/151/2/45",
language = "English (US)",
volume = "151",
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Eastman, JD, Beatty, T, Siverd, RJ, Antognini, JMO, Penny, MT, Gonzales, EJ, Crepp, JR, Howard, AW, Avril, RL, Bieryla, A, Collins, K, Fulton, BJ, Ge, J, Gregorio, J, Ma, B, Mellon, SN, Oberst, TE, Wang, J, Gaudi, BS, Pepper, J, Stassun, KG, Buchhave, LA, Jensen, ELN, Latham, DW, Berlind, P, Calkins, ML, Cargile, PA, Colón, KD, Dhital, S, Esquerdo, GA, Johnson, JA, Kielkopf, JF, Manner, M, Mao, Q, McLeod, KK, Penev, K, Stefanik, RP, Street, R, Zambelli, R, DePoy, DL, Gould, A, Marshall, JL, Pogge, RW, Trueblood, M & Trueblood, P 2016, 'Kelt-4Ab: An inflated hot jupiter transiting the bright (V ∼ 10) component of a hierarchical triple', Astronomical Journal, vol. 151, no. 2, 45. https://doi.org/10.3847/0004-6256/151/2/45

Kelt-4Ab : An inflated hot jupiter transiting the bright (V ∼ 10) component of a hierarchical triple. / Eastman, Jason D.; Beatty, Thomas; Siverd, Robert J.; Antognini, Joseph M.O.; Penny, Matthew T.; Gonzales, Erica J.; Crepp, Justin R.; Howard, Andrew W.; Avril, Ryan L.; Bieryla, Allyson; Collins, Karen; Fulton, Benjamin J.; Ge, Jian; Gregorio, Joao; Ma, Bo; Mellon, Samuel N.; Oberst, Thomas E.; Wang, Ji; Gaudi, B. Scott; Pepper, Joshua; Stassun, Keivan G.; Buchhave, Lars A.; Jensen, Eric L.N.; Latham, David W.; Berlind, Perry; Calkins, Michael L.; Cargile, Phillip A.; Colón, Knicole D.; Dhital, Saurav; Esquerdo, Gilbert A.; Johnson, John Asher; Kielkopf, John F.; Manner, Mark; Mao, Qingqing; McLeod, Kim K.; Penev, Kaloyan; Stefanik, Robert P.; Street, Rachel; Zambelli, Roberto; DePoy, D. L.; Gould, Andrew; Marshall, Jennifer L.; Pogge, Richard W.; Trueblood, Mark; Trueblood, Patricia.

In: Astronomical Journal, Vol. 151, No. 2, 45, 01.02.2016.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Kelt-4Ab

T2 - An inflated hot jupiter transiting the bright (V ∼ 10) component of a hierarchical triple

AU - Eastman, Jason D.

AU - Beatty, Thomas

AU - Siverd, Robert J.

AU - Antognini, Joseph M.O.

AU - Penny, Matthew T.

AU - Gonzales, Erica J.

AU - Crepp, Justin R.

AU - Howard, Andrew W.

AU - Avril, Ryan L.

AU - Bieryla, Allyson

AU - Collins, Karen

AU - Fulton, Benjamin J.

AU - Ge, Jian

AU - Gregorio, Joao

AU - Ma, Bo

AU - Mellon, Samuel N.

AU - Oberst, Thomas E.

AU - Wang, Ji

AU - Gaudi, B. Scott

AU - Pepper, Joshua

AU - Stassun, Keivan G.

AU - Buchhave, Lars A.

AU - Jensen, Eric L.N.

AU - Latham, David W.

AU - Berlind, Perry

AU - Calkins, Michael L.

AU - Cargile, Phillip A.

AU - Colón, Knicole D.

AU - Dhital, Saurav

AU - Esquerdo, Gilbert A.

AU - Johnson, John Asher

AU - Kielkopf, John F.

AU - Manner, Mark

AU - Mao, Qingqing

AU - McLeod, Kim K.

AU - Penev, Kaloyan

AU - Stefanik, Robert P.

AU - Street, Rachel

AU - Zambelli, Roberto

AU - DePoy, D. L.

AU - Gould, Andrew

AU - Marshall, Jennifer L.

AU - Pogge, Richard W.

AU - Trueblood, Mark

AU - Trueblood, Patricia

PY - 2016/2/1

Y1 - 2016/2/1

N2 - We report the discovery of KELT-4Ab, an inflated, transiting Hot Jupiter orbiting the brightest component of ahierarchical triple stellar system. The host star is an F star with Teff =6206 ± 75 K, log g =4.108 ± 0.014, [Fe/H]= -0.116+0.069+0.065, M∗ = 1.201-0.061+0.067 M⊙, and R∗ = 1.603-0.038+0.039 R⊙. The best-fit linear ephemeris is BJDTDB =2456193.29157±0.00021 + E(2.9895936±0.0000048). With a magnitude of V∼10, a planetary radius of 1.699-0.045+0.046 RJ, and a mass of 0.902-0.059+0.060 MJ, it is the brightest host among the population of inflated Hot Jupiters (RP > 1.5RJ), making it a valuable discovery for probing the nature of inflated planets. In addition, its existence within a hierarchical triple and its proximity to Earth (210 pc) provide a unique opportunity for dynamical studies with continued monitoring with high resolution imaging and precision radial velocities. The projected separation between KELT-4A and KELT-4BC is 328±16 AU and the projected separation between KELT-4B and KELT-4C is 10.30±0.74 AU. Assuming face-on, circular orbits, their respective periods would be 3780±290 and 29.4±3.6 years and the astrometric motions relative to the epoch in this work of both the binary stars around each other and of the binary around the primary star would be detectable now and may provide meaningful constraints on the dynamics of the system.

AB - We report the discovery of KELT-4Ab, an inflated, transiting Hot Jupiter orbiting the brightest component of ahierarchical triple stellar system. The host star is an F star with Teff =6206 ± 75 K, log g =4.108 ± 0.014, [Fe/H]= -0.116+0.069+0.065, M∗ = 1.201-0.061+0.067 M⊙, and R∗ = 1.603-0.038+0.039 R⊙. The best-fit linear ephemeris is BJDTDB =2456193.29157±0.00021 + E(2.9895936±0.0000048). With a magnitude of V∼10, a planetary radius of 1.699-0.045+0.046 RJ, and a mass of 0.902-0.059+0.060 MJ, it is the brightest host among the population of inflated Hot Jupiters (RP > 1.5RJ), making it a valuable discovery for probing the nature of inflated planets. In addition, its existence within a hierarchical triple and its proximity to Earth (210 pc) provide a unique opportunity for dynamical studies with continued monitoring with high resolution imaging and precision radial velocities. The projected separation between KELT-4A and KELT-4BC is 328±16 AU and the projected separation between KELT-4B and KELT-4C is 10.30±0.74 AU. Assuming face-on, circular orbits, their respective periods would be 3780±290 and 29.4±3.6 years and the astrometric motions relative to the epoch in this work of both the binary stars around each other and of the binary around the primary star would be detectable now and may provide meaningful constraints on the dynamics of the system.

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