KELT-7b: A HOT JUPITER TRANSITING A BRIGHT v = 8.54 RAPIDLY ROTATING F-STAR

Allyson Bieryla; Karen Collins; Thomas G. Beatty; Jason Eastman; Robert J. Siverd; Joshua Pepper; B. Scott Gaudi; Keivan G. Stassun; Caleb Cañas; David W. Latham; Lars A. Buchhave; Roberto Sanchis-Ojeda; Joshua N. Winn; Eric L.N. Jensen; John F. Kielkopf; Kim K. McLeod; Joao Gregorio; Knicole D. Colón; Rachel Street; Rachel Ross; Matthew Penny; Samuel N. Mellon; Thomas E. Oberst; Benjamin J. Fulton; Ji Wang; Perry Berlind; Michael L. Calkins; Gilbert A. Esquerdo; Darren L. Depoy; Andrew Gould; Jennifer Marshall; Richard Pogge; Mark Trueblood; Patricia Trueblood

doi:10.1088/0004-6256/150/1/12

KELT-7b: A HOT JUPITER TRANSITING A BRIGHT v = 8.54 RAPIDLY ROTATING F-STAR

Allyson Bieryla, Karen Collins, Thomas G. Beatty, Jason Eastman, Robert J. Siverd, Joshua Pepper, B. Scott Gaudi, Keivan G. Stassun, Caleb Cañas, David W. Latham, Lars A. Buchhave, Roberto Sanchis-Ojeda, Joshua N. Winn, Eric L.N. Jensen, John F. Kielkopf, Kim K. McLeod, Joao Gregorio, Knicole D. Colón, Rachel Street, Rachel RossMatthew Penny, Samuel N. Mellon, Thomas E. Oberst, Benjamin J. Fulton, Ji Wang, Perry Berlind, Michael L. Calkins, Gilbert A. Esquerdo, Darren L. Depoy, Andrew Gould, Jennifer Marshall, Richard Pogge, Mark Trueblood, Patricia Trueblood

Astronomy & Astrophysics

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Abstract

We report the discovery of KELT-7b, a transiting hot Jupiter with a mass of 1.28 ± 0.18MJ, radius of 1.533 _0.047 ^0.046RJ, and an orbital period of 2.7347749 ± 0.0000039 days. The bright host star (HD 33643; KELT-7) is an F-star with V = 8.54, T_eff= 6789 ₄₉ ₅₀ K, [Fe/H] 0.139 _0.081 = ^-0.075, and log g = 4.149 ± 0.019. It has a mass of 1.535 _0.054 ^0.066 Me, a radius of 1.732 _0.045 ^0.043 Re, and is the fifth most massive, fifth hottest, and the ninth brightest star known to host a transiting planet. It is also the brightest star around which Kilodegree Extremely Little Telescope (KELT) has discovered a transiting planet. Thus, KELT-7b is an ideal target for detailed characterization given its relatively low surface gravity, high equilibrium temperature, and bright host star. The rapid rotation of the star (73 ± 0.5 km s-1) results in a RossiterMcLaughlin effect with an unusually large amplitude of several hundred m s-1. We find that the orbit normal of the planet is likely to be well-aligned with the stellar spin axis, with a projected spin orbit alignment of = 9.7 ± 5. 2. This is currently the second most rapidly rotating star to have a reflex signal (and thus mass determination) due to a planetary companion measured.

Original language	English (US)
Article number	12
Journal	Astronomical Journal
Volume	150
Issue number	1
DOIs	https://doi.org/10.1088/0004-6256/150/1/12
State	Published - Jul 1 2015

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Bieryla, A., Collins, K., Beatty, T. G., Eastman, J., Siverd, R. J., Pepper, J., Gaudi, B. S., Stassun, K. G., Cañas, C., Latham, D. W., Buchhave, L. A., Sanchis-Ojeda, R., Winn, J. N., Jensen, E. L. N., Kielkopf, J. F., McLeod, K. K., Gregorio, J., Colón, K. D., Street, R., ... Trueblood, P. (2015). KELT-7b: A HOT JUPITER TRANSITING A BRIGHT v = 8.54 RAPIDLY ROTATING F-STAR. Astronomical Journal, 150(1), Article 12. https://doi.org/10.1088/0004-6256/150/1/12

@article{64afde30013444dbb2cfa5358a4106e2,

title = "KELT-7b: A HOT JUPITER TRANSITING A BRIGHT v = 8.54 RAPIDLY ROTATING F-STAR",

abstract = "We report the discovery of KELT-7b, a transiting hot Jupiter with a mass of 1.28 ± 0.18MJ, radius of 1.533 0.047 0.046RJ, and an orbital period of 2.7347749 ± 0.0000039 days. The bright host star (HD 33643; KELT-7) is an F-star with V = 8.54, Teff= 6789 49 50 K, [Fe/H] 0.139 0.081 = -0.075, and log g = 4.149 ± 0.019. It has a mass of 1.535 0.054 0.066 Me, a radius of 1.732 0.045 0.043 Re, and is the fifth most massive, fifth hottest, and the ninth brightest star known to host a transiting planet. It is also the brightest star around which Kilodegree Extremely Little Telescope (KELT) has discovered a transiting planet. Thus, KELT-7b is an ideal target for detailed characterization given its relatively low surface gravity, high equilibrium temperature, and bright host star. The rapid rotation of the star (73 ± 0.5 km s-1) results in a RossiterMcLaughlin effect with an unusually large amplitude of several hundred m s-1. We find that the orbit normal of the planet is likely to be well-aligned with the stellar spin axis, with a projected spin orbit alignment of = 9.7 ± 5. 2. This is currently the second most rapidly rotating star to have a reflex signal (and thus mass determination) due to a planetary companion measured.",

author = "Allyson Bieryla and Karen Collins and Beatty, {Thomas G.} and Jason Eastman and Siverd, {Robert J.} and Joshua Pepper and Gaudi, {B. Scott} and Stassun, {Keivan G.} and Caleb Ca{\~n}as and Latham, {David W.} and Buchhave, {Lars A.} and Roberto Sanchis-Ojeda and Winn, {Joshua N.} and Jensen, {Eric L.N.} and Kielkopf, {John F.} and McLeod, {Kim K.} and Joao Gregorio and Col{\'o}n, {Knicole D.} and Rachel Street and Rachel Ross and Matthew Penny and Mellon, {Samuel N.} and Oberst, {Thomas E.} and Fulton, {Benjamin J.} and Ji Wang and Perry Berlind and Calkins, {Michael L.} and Esquerdo, {Gilbert A.} and Depoy, {Darren L.} and Andrew Gould and Jennifer Marshall and Richard Pogge and Mark Trueblood and Patricia Trueblood",

year = "2015",

month = jul,

day = "1",

doi = "10.1088/0004-6256/150/1/12",

language = "English (US)",

volume = "150",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "American Astronomical Society",

number = "1",

}

Bieryla, A, Collins, K, Beatty, TG, Eastman, J, Siverd, RJ, Pepper, J, Gaudi, BS, Stassun, KG, Cañas, C, Latham, DW, Buchhave, LA, Sanchis-Ojeda, R, Winn, JN, Jensen, ELN, Kielkopf, JF, McLeod, KK, Gregorio, J, Colón, KD, Street, R, Ross, R, Penny, M, Mellon, SN, Oberst, TE, Fulton, BJ, Wang, J, Berlind, P, Calkins, ML, Esquerdo, GA, Depoy, DL, Gould, A, Marshall, J, Pogge, R, Trueblood, M & Trueblood, P 2015, 'KELT-7b: A HOT JUPITER TRANSITING A BRIGHT v = 8.54 RAPIDLY ROTATING F-STAR', Astronomical Journal, vol. 150, no. 1, 12. https://doi.org/10.1088/0004-6256/150/1/12

TY - JOUR

T1 - KELT-7b

T2 - A HOT JUPITER TRANSITING A BRIGHT v = 8.54 RAPIDLY ROTATING F-STAR

AU - Bieryla, Allyson

AU - Collins, Karen

AU - Beatty, Thomas G.

AU - Eastman, Jason

AU - Siverd, Robert J.

AU - Pepper, Joshua

AU - Gaudi, B. Scott

AU - Stassun, Keivan G.

AU - Cañas, Caleb

AU - Latham, David W.

AU - Buchhave, Lars A.

AU - Sanchis-Ojeda, Roberto

AU - Winn, Joshua N.

AU - Jensen, Eric L.N.

AU - Kielkopf, John F.

AU - McLeod, Kim K.

AU - Gregorio, Joao

AU - Colón, Knicole D.

AU - Street, Rachel

AU - Ross, Rachel

AU - Penny, Matthew

AU - Mellon, Samuel N.

AU - Oberst, Thomas E.

AU - Fulton, Benjamin J.

AU - Wang, Ji

AU - Berlind, Perry

AU - Calkins, Michael L.

AU - Esquerdo, Gilbert A.

AU - Depoy, Darren L.

AU - Gould, Andrew

AU - Marshall, Jennifer

AU - Pogge, Richard

AU - Trueblood, Mark

AU - Trueblood, Patricia

PY - 2015/7/1

Y1 - 2015/7/1

N2 - We report the discovery of KELT-7b, a transiting hot Jupiter with a mass of 1.28 ± 0.18MJ, radius of 1.533 0.047 0.046RJ, and an orbital period of 2.7347749 ± 0.0000039 days. The bright host star (HD 33643; KELT-7) is an F-star with V = 8.54, Teff= 6789 49 50 K, [Fe/H] 0.139 0.081 = -0.075, and log g = 4.149 ± 0.019. It has a mass of 1.535 0.054 0.066 Me, a radius of 1.732 0.045 0.043 Re, and is the fifth most massive, fifth hottest, and the ninth brightest star known to host a transiting planet. It is also the brightest star around which Kilodegree Extremely Little Telescope (KELT) has discovered a transiting planet. Thus, KELT-7b is an ideal target for detailed characterization given its relatively low surface gravity, high equilibrium temperature, and bright host star. The rapid rotation of the star (73 ± 0.5 km s-1) results in a RossiterMcLaughlin effect with an unusually large amplitude of several hundred m s-1. We find that the orbit normal of the planet is likely to be well-aligned with the stellar spin axis, with a projected spin orbit alignment of = 9.7 ± 5. 2. This is currently the second most rapidly rotating star to have a reflex signal (and thus mass determination) due to a planetary companion measured.

AB - We report the discovery of KELT-7b, a transiting hot Jupiter with a mass of 1.28 ± 0.18MJ, radius of 1.533 0.047 0.046RJ, and an orbital period of 2.7347749 ± 0.0000039 days. The bright host star (HD 33643; KELT-7) is an F-star with V = 8.54, Teff= 6789 49 50 K, [Fe/H] 0.139 0.081 = -0.075, and log g = 4.149 ± 0.019. It has a mass of 1.535 0.054 0.066 Me, a radius of 1.732 0.045 0.043 Re, and is the fifth most massive, fifth hottest, and the ninth brightest star known to host a transiting planet. It is also the brightest star around which Kilodegree Extremely Little Telescope (KELT) has discovered a transiting planet. Thus, KELT-7b is an ideal target for detailed characterization given its relatively low surface gravity, high equilibrium temperature, and bright host star. The rapid rotation of the star (73 ± 0.5 km s-1) results in a RossiterMcLaughlin effect with an unusually large amplitude of several hundred m s-1. We find that the orbit normal of the planet is likely to be well-aligned with the stellar spin axis, with a projected spin orbit alignment of = 9.7 ± 5. 2. This is currently the second most rapidly rotating star to have a reflex signal (and thus mass determination) due to a planetary companion measured.

UR - http://www.scopus.com/inward/record.url?scp=84936091103&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84936091103&partnerID=8YFLogxK

U2 - 10.1088/0004-6256/150/1/12

DO - 10.1088/0004-6256/150/1/12

M3 - Article

AN - SCOPUS:84936091103

SN - 0004-6256

VL - 150

JO - Astronomical Journal

JF - Astronomical Journal

IS - 1

M1 - 12

ER -

KELT-7b: A HOT JUPITER TRANSITING A BRIGHT v = 8.54 RAPIDLY ROTATING F-STAR

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