KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin

Jonathan Labadie-Bartz; Joseph E. Rodriguez; Keivan G. Stassun; David R. Ciardi; Kaloyan Penev; Marshall C. Johnson; B. Scott Gaudi; Knicole D. Colón; Allyson Bieryla; David W. Latham; Joshua Pepper; Karen A. Collins; Phil Evans; Howard Relles; Robert J. Siverd; Joao Bento; Xinyu Yao; Chris Stockdale; Thiam Guan Tan; George Zhou; Jason D. Eastman; Michael D. Albrow; Daniel Bayliss; Thomas G. Beatty; Perry Berlind; Valerio Bozza; Michael L. Calkins; David H. Cohen; Ivan A. Curtis; Gilbert A. Esquerdo; Dax Feliz; Benjamin J. Fulton; Joao Gregorio; David James; Eric L.N. Jensen; John A. Johnson; Samson A. Johnson; Michael D. Joner; David Kasper; John F. Kielkopf; Rudolf B. Kuhn; Michael B. Lund; Amber Malpas; Mark Manner; Nate McCrady; Kim K. McLeod; Thomas E. Oberst; Matthew T. Penny; Phillip A. Reed; David H. Sliski; Denise C. Stephens; Daniel J. Stevens; Steven Villanueva; Robert A. Wittenmyer; J. T. Wright; Roberto Zambelli

doi:10.3847/1538-4365/aaee7e

KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin

Jonathan Labadie-Bartz, Joseph E. Rodriguez, Keivan G. Stassun, David R. Ciardi, Kaloyan Penev, Marshall C. Johnson, B. Scott Gaudi, Knicole D. Colón, Allyson Bieryla, David W. Latham, Joshua Pepper, Karen A. Collins, Phil Evans, Howard Relles, Robert J. Siverd, Joao Bento, Xinyu Yao, Chris Stockdale, Thiam Guan Tan, George ZhouJason D. Eastman, Michael D. Albrow, Daniel Bayliss, Thomas G. Beatty, Perry Berlind, Valerio Bozza, Michael L. Calkins, David H. Cohen, Ivan A. Curtis, Gilbert A. Esquerdo, Dax Feliz, Benjamin J. Fulton, Joao Gregorio, David James, Eric L.N. Jensen, John A. Johnson, Samson A. Johnson, Michael D. Joner, David Kasper, John F. Kielkopf, Rudolf B. Kuhn, Michael B. Lund, Amber Malpas, Mark Manner, Nate McCrady, Kim K. McLeod, Thomas E. Oberst, Matthew T. Penny, Phillip A. Reed, David H. Sliski, Denise C. Stephens, Daniel J. Stevens, Steven Villanueva, Robert A. Wittenmyer, J. T. Wright, Roberto Zambelli

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

6 Scopus citations

Abstract

We present the discovery of KELT-22Ab, a hot Jupiter from the KELT-South survey. KELT-22Ab transits the moderately bright (V ∼ 11.1) Sun-like G2V star TYC 7518-468-1. The planet has an orbital period of days, a radius of , and a relatively large mass of . The star has , , K, (cgs), and [m/H] = ; thus other than its slightly super-solar metallicity, it appears to be a near-solar twin. Surprisingly, KELT-22A exhibits kinematics and a Galactic orbit that are somewhat atypical for thin-disk stars. Nevertheless, the star is rotating rapidly for its estimated age, and shows evidence of chromospheric activity. Imaging reveals a slightly fainter companion to KELT-22A that is likely bound, with a projected separation of 6″ (∼1400 au). In addition to the orbital motion caused by the transiting planet, we detect a possible linear trend in the radial velocity of KELT-22A, suggesting the presence of another relatively nearby body that is perhaps non-stellar. KELT-22Ab is highly irradiated (as a consequence of the small semimajor axis of ), and is mildly inflated. At such small separations, tidal forces become significant. The configuration of this system is optimal for measuring the rate of tidal dissipation within the host star. Our models predict that, due to tidal forces, the semimajor axis is decreasing rapidly, and KELT-22Ab is predicted to spiral into the star within the next Gyr.

Original language	English (US)
Article number	13
Journal	Astrophysical Journal, Supplement Series
Volume	240
Issue number	1
DOIs	https://doi.org/10.3847/1538-4365/aaee7e
State	Published - Jan 2019
Externally published	Yes

Keywords

methods: observational
planets and satellites: detection
planets and satellites: gaseous planets
techniques: photometric
techniques: radial velocities
techniques: spectroscopic

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.3847/1538-4365/aaee7e

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Labadie-Bartz, J., Rodriguez, J. E., Stassun, K. G., Ciardi, D. R., Penev, K., Johnson, M. C., Gaudi, B. S., Colón, K. D., Bieryla, A., Latham, D. W., Pepper, J., Collins, K. A., Evans, P., Relles, H., Siverd, R. J., Bento, J., Yao, X., Stockdale, C., Tan, T. G., ... Zambelli, R. (2019). KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin. Astrophysical Journal, Supplement Series, 240(1), [13]. https://doi.org/10.3847/1538-4365/aaee7e

Labadie-Bartz, J, Rodriguez, JE, Stassun, KG, Ciardi, DR, Penev, K, Johnson, MC, Gaudi, BS, Colón, KD, Bieryla, A, Latham, DW, Pepper, J, Collins, KA, Evans, P, Relles, H, Siverd, RJ, Bento, J, Yao, X, Stockdale, C, Tan, TG, Zhou, G, Eastman, JD, Albrow, MD, Bayliss, D, Beatty, TG, Berlind, P, Bozza, V, Calkins, ML, Cohen, DH, Curtis, IA, Esquerdo, GA, Feliz, D, Fulton, BJ, Gregorio, J, James, D, Jensen, ELN, Johnson, JA, Johnson, SA, Joner, MD, Kasper, D, Kielkopf, JF, Kuhn, RB, Lund, MB, Malpas, A, Manner, M, McCrady, N, McLeod, KK, Oberst, TE, Penny, MT, Reed, PA, Sliski, DH, Stephens, DC, Stevens, DJ, Villanueva, S, Wittenmyer, RA, Wright, JT & Zambelli, R 2019, 'KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin', Astrophysical Journal, Supplement Series, vol. 240, no. 1, 13. https://doi.org/10.3847/1538-4365/aaee7e

@article{f6272224fc104445bfea111a353120e8,

title = "KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin",

abstract = "We present the discovery of KELT-22Ab, a hot Jupiter from the KELT-South survey. KELT-22Ab transits the moderately bright (V ∼ 11.1) Sun-like G2V star TYC 7518-468-1. The planet has an orbital period of days, a radius of , and a relatively large mass of . The star has , , K, (cgs), and [m/H] = ; thus other than its slightly super-solar metallicity, it appears to be a near-solar twin. Surprisingly, KELT-22A exhibits kinematics and a Galactic orbit that are somewhat atypical for thin-disk stars. Nevertheless, the star is rotating rapidly for its estimated age, and shows evidence of chromospheric activity. Imaging reveals a slightly fainter companion to KELT-22A that is likely bound, with a projected separation of 6″ (∼1400 au). In addition to the orbital motion caused by the transiting planet, we detect a possible linear trend in the radial velocity of KELT-22A, suggesting the presence of another relatively nearby body that is perhaps non-stellar. KELT-22Ab is highly irradiated (as a consequence of the small semimajor axis of ), and is mildly inflated. At such small separations, tidal forces become significant. The configuration of this system is optimal for measuring the rate of tidal dissipation within the host star. Our models predict that, due to tidal forces, the semimajor axis is decreasing rapidly, and KELT-22Ab is predicted to spiral into the star within the next Gyr.",

keywords = "methods: observational, planets and satellites: detection, planets and satellites: gaseous planets, techniques: photometric, techniques: radial velocities, techniques: spectroscopic",

author = "Jonathan Labadie-Bartz and Rodriguez, {Joseph E.} and Stassun, {Keivan G.} and Ciardi, {David R.} and Kaloyan Penev and Johnson, {Marshall C.} and Gaudi, {B. Scott} and Col{\'o}n, {Knicole D.} and Allyson Bieryla and Latham, {David W.} and Joshua Pepper and Collins, {Karen A.} and Phil Evans and Howard Relles and Siverd, {Robert J.} and Joao Bento and Xinyu Yao and Chris Stockdale and Tan, {Thiam Guan} and George Zhou and Eastman, {Jason D.} and Albrow, {Michael D.} and Daniel Bayliss and Beatty, {Thomas G.} and Perry Berlind and Valerio Bozza and Calkins, {Michael L.} and Cohen, {David H.} and Curtis, {Ivan A.} and Esquerdo, {Gilbert A.} and Dax Feliz and Fulton, {Benjamin J.} and Joao Gregorio and David James and Jensen, {Eric L.N.} and Johnson, {John A.} and Johnson, {Samson A.} and Joner, {Michael D.} and David Kasper and Kielkopf, {John F.} and Kuhn, {Rudolf B.} and Lund, {Michael B.} and Amber Malpas and Mark Manner and Nate McCrady and McLeod, {Kim K.} and Oberst, {Thomas E.} and Penny, {Matthew T.} and Reed, {Phillip A.} and Sliski, {David H.} and Stephens, {Denise C.} and Stevens, {Daniel J.} and Steven Villanueva and Wittenmyer, {Robert A.} and Wright, {J. T.} and Roberto Zambelli",

note = "Funding Information: This project makes use of data from the KELT survey, including support from The Ohio State University, Vanderbilt University, and Lehigh University, along with the KELT follow-up collaboration. J.L.-B. acknowledges support from FAPESP (grant 2017/23731-1). Work performed by J.E.R. was supported by the Harvard Future Faculty Leaders Postdoctoral fellowship. D.W.L. acknowledges partial support under NASA Cooperative Agreement NNX13AB58A with the Smithsonian Astrophysical Observatory. D.J.S. and B.S.G. were partially supported by NSF CAREER grant AST-1056524. D.J.J. gratefully acknowledges support from National Science Foundation award NSF-1440254. Work by S.V.Jr. is supported by the National Science Foundation Graduate Research Fellowship under grant No. DGE-1343012 and the David G. Price Fellowship in Astronomical Instrumentation. Work by G.Z. is provided by NASA through Hubble Fellowship grant HST-HF2-51402.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS 5-26555. This work has made use of NASA{\textquoteright}s Astrophysics Data System, the Extrasolar Planet Encyclopedia, the NASA Exoplanet Archive, the SIMBAD database operated at CDS, Strasbourg, France, and the VizieR catalog access tool, CDS, Strasbourg, France. We also used data products from the Widefield Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles; the Jet Propulsion Laboratory/California Institute of Technology, which is funded by the National Aeronautics and Space Administration; the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation; and the European Space Agency (ESA) mission Gaia (http://www. cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa. int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. MINERVA is a collaboration among the Harvard-Smithsonian Center for Astrophysics, The Pennsylvania State University, the University of Montana, and the University of New South Wales. MINERVA is made possible by generous contributions from its collaborating institutions and Mt. Cuba Astronomical Foundation, The David & Lucile Packard Foundation, National Aeronautics and Space Administration (EPSCOR grant NNX13AM97A), The Australian Research Council (LIEF grant LE140100050), and the National Science Foundation (grants 1516242 and 1608203). The Center for Exoplanets and Habitable Worlds is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. Any opinions, findings, and conclusions or recommendations expressed are those of the author and do not necessarily reflect the views of the National Science Foundation. Publisher Copyright: {\textcopyright} 2019. The American Astronomical Society. All rights reserved.",

year = "2019",

month = jan,

doi = "10.3847/1538-4365/aaee7e",

language = "English (US)",

volume = "240",

journal = "Astrophysical Journal, Supplement Series",

issn = "0067-0049",

publisher = "IOP Publishing Ltd.",

number = "1",

}

TY - JOUR

T1 - KELT-22Ab

T2 - A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin

AU - Labadie-Bartz, Jonathan

AU - Rodriguez, Joseph E.

AU - Stassun, Keivan G.

AU - Ciardi, David R.

AU - Penev, Kaloyan

AU - Johnson, Marshall C.

AU - Gaudi, B. Scott

AU - Colón, Knicole D.

AU - Bieryla, Allyson

AU - Latham, David W.

AU - Pepper, Joshua

AU - Collins, Karen A.

AU - Evans, Phil

AU - Relles, Howard

AU - Siverd, Robert J.

AU - Bento, Joao

AU - Yao, Xinyu

AU - Stockdale, Chris

AU - Tan, Thiam Guan

AU - Zhou, George

AU - Eastman, Jason D.

AU - Albrow, Michael D.

AU - Bayliss, Daniel

AU - Beatty, Thomas G.

AU - Berlind, Perry

AU - Bozza, Valerio

AU - Calkins, Michael L.

AU - Cohen, David H.

AU - Curtis, Ivan A.

AU - Esquerdo, Gilbert A.

AU - Feliz, Dax

AU - Fulton, Benjamin J.

AU - Gregorio, Joao

AU - James, David

AU - Jensen, Eric L.N.

AU - Johnson, John A.

AU - Johnson, Samson A.

AU - Joner, Michael D.

AU - Kasper, David

AU - Kielkopf, John F.

AU - Kuhn, Rudolf B.

AU - Lund, Michael B.

AU - Malpas, Amber

AU - Manner, Mark

AU - McCrady, Nate

AU - McLeod, Kim K.

AU - Oberst, Thomas E.

AU - Penny, Matthew T.

AU - Reed, Phillip A.

AU - Sliski, David H.

AU - Stephens, Denise C.

AU - Stevens, Daniel J.

AU - Villanueva, Steven

AU - Wittenmyer, Robert A.

AU - Wright, J. T.

AU - Zambelli, Roberto

N1 - Funding Information: This project makes use of data from the KELT survey, including support from The Ohio State University, Vanderbilt University, and Lehigh University, along with the KELT follow-up collaboration. J.L.-B. acknowledges support from FAPESP (grant 2017/23731-1). Work performed by J.E.R. was supported by the Harvard Future Faculty Leaders Postdoctoral fellowship. D.W.L. acknowledges partial support under NASA Cooperative Agreement NNX13AB58A with the Smithsonian Astrophysical Observatory. D.J.S. and B.S.G. were partially supported by NSF CAREER grant AST-1056524. D.J.J. gratefully acknowledges support from National Science Foundation award NSF-1440254. Work by S.V.Jr. is supported by the National Science Foundation Graduate Research Fellowship under grant No. DGE-1343012 and the David G. Price Fellowship in Astronomical Instrumentation. Work by G.Z. is provided by NASA through Hubble Fellowship grant HST-HF2-51402.001-A awarded by the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc., for NASA, under contract NAS 5-26555. This work has made use of NASA’s Astrophysics Data System, the Extrasolar Planet Encyclopedia, the NASA Exoplanet Archive, the SIMBAD database operated at CDS, Strasbourg, France, and the VizieR catalog access tool, CDS, Strasbourg, France. We also used data products from the Widefield Infrared Survey Explorer, which is a joint project of the University of California, Los Angeles; the Jet Propulsion Laboratory/California Institute of Technology, which is funded by the National Aeronautics and Space Administration; the Two Micron All Sky Survey, which is a joint project of the University of Massachusetts and the Infrared Processing and Analysis Center/California Institute of Technology, funded by the National Aeronautics and Space Administration and the National Science Foundation; and the European Space Agency (ESA) mission Gaia (http://www. cosmos.esa.int/gaia), processed by the Gaia Data Processing and Analysis Consortium (DPAC, http://www.cosmos.esa. int/web/gaia/dpac/consortium). Funding for the DPAC has been provided by national institutions, in particular the institutions participating in the Gaia Multilateral Agreement. MINERVA is a collaboration among the Harvard-Smithsonian Center for Astrophysics, The Pennsylvania State University, the University of Montana, and the University of New South Wales. MINERVA is made possible by generous contributions from its collaborating institutions and Mt. Cuba Astronomical Foundation, The David & Lucile Packard Foundation, National Aeronautics and Space Administration (EPSCOR grant NNX13AM97A), The Australian Research Council (LIEF grant LE140100050), and the National Science Foundation (grants 1516242 and 1608203). The Center for Exoplanets and Habitable Worlds is supported by the Pennsylvania State University, the Eberly College of Science, and the Pennsylvania Space Grant Consortium. Any opinions, findings, and conclusions or recommendations expressed are those of the author and do not necessarily reflect the views of the National Science Foundation. Publisher Copyright: © 2019. The American Astronomical Society. All rights reserved.

PY - 2019/1

Y1 - 2019/1

N2 - We present the discovery of KELT-22Ab, a hot Jupiter from the KELT-South survey. KELT-22Ab transits the moderately bright (V ∼ 11.1) Sun-like G2V star TYC 7518-468-1. The planet has an orbital period of days, a radius of , and a relatively large mass of . The star has , , K, (cgs), and [m/H] = ; thus other than its slightly super-solar metallicity, it appears to be a near-solar twin. Surprisingly, KELT-22A exhibits kinematics and a Galactic orbit that are somewhat atypical for thin-disk stars. Nevertheless, the star is rotating rapidly for its estimated age, and shows evidence of chromospheric activity. Imaging reveals a slightly fainter companion to KELT-22A that is likely bound, with a projected separation of 6″ (∼1400 au). In addition to the orbital motion caused by the transiting planet, we detect a possible linear trend in the radial velocity of KELT-22A, suggesting the presence of another relatively nearby body that is perhaps non-stellar. KELT-22Ab is highly irradiated (as a consequence of the small semimajor axis of ), and is mildly inflated. At such small separations, tidal forces become significant. The configuration of this system is optimal for measuring the rate of tidal dissipation within the host star. Our models predict that, due to tidal forces, the semimajor axis is decreasing rapidly, and KELT-22Ab is predicted to spiral into the star within the next Gyr.

AB - We present the discovery of KELT-22Ab, a hot Jupiter from the KELT-South survey. KELT-22Ab transits the moderately bright (V ∼ 11.1) Sun-like G2V star TYC 7518-468-1. The planet has an orbital period of days, a radius of , and a relatively large mass of . The star has , , K, (cgs), and [m/H] = ; thus other than its slightly super-solar metallicity, it appears to be a near-solar twin. Surprisingly, KELT-22A exhibits kinematics and a Galactic orbit that are somewhat atypical for thin-disk stars. Nevertheless, the star is rotating rapidly for its estimated age, and shows evidence of chromospheric activity. Imaging reveals a slightly fainter companion to KELT-22A that is likely bound, with a projected separation of 6″ (∼1400 au). In addition to the orbital motion caused by the transiting planet, we detect a possible linear trend in the radial velocity of KELT-22A, suggesting the presence of another relatively nearby body that is perhaps non-stellar. KELT-22Ab is highly irradiated (as a consequence of the small semimajor axis of ), and is mildly inflated. At such small separations, tidal forces become significant. The configuration of this system is optimal for measuring the rate of tidal dissipation within the host star. Our models predict that, due to tidal forces, the semimajor axis is decreasing rapidly, and KELT-22Ab is predicted to spiral into the star within the next Gyr.

KW - methods: observational

KW - planets and satellites: detection

KW - planets and satellites: gaseous planets

KW - techniques: photometric

KW - techniques: radial velocities

KW - techniques: spectroscopic

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DO - 10.3847/1538-4365/aaee7e

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SN - 0067-0049

VL - 240

JO - Astrophysical Journal, Supplement Series

JF - Astrophysical Journal, Supplement Series

IS - 1

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ER -

KELT-22Ab: A Massive, Short-Period Hot Jupiter Transiting a Near-solar Twin

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