Characterization of the atmosphere of the hot Jupiter HAT-P-32Ab and the M-Dwarf companion HAT-P-32B

Ming Zhao, Joseph G. O'Rourke, Jason T. Wright, Heather A. Knutson, Adam Burrows, Johnathan Fortney, Henry Ngo, Benjamin J. Fulton, Christoph Baranec, Reed Riddle, Nicholas M. Law, Philip S. Muirhead, Sasha Hinkley, Adam Showman, Jason Curtis, Rick Burruss

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

We report secondary eclipse photometry of the hot Jupiter HAT-P-32Ab, taken with Hale/Wide-field Infra-Red Camera (WIRC) in H and KS bands and with Spitzer/IRAC at 3.6 and 4.5 μm. We carried out adaptive optics imaging of the planet host star HAT-P-32A and its companion HAT-P-32B in the near-IR and the visible. We clearly resolve the two stars from each other and find a separation of 2.″923 ± 0.″004 and a position angle 110.°64 ± 0.°12. We measure the flux ratios of the binary in g′r′i′z′ and H and KS bands, and determine T eff= 3565 ± 82 K for the companion star, corresponding to an M1.5 dwarf. We use PHOENIX stellar atmosphere models to correct the dilution of the secondary eclipse depths of the hot Jupiter due to the presence of the M1.5 companion. We also improve the secondary eclipse photometry by accounting for the non-classical, flux-dependent nonlinearity of the WIRC IR detector in the H band. We measure planet-to-star flux ratios of 0.090% ± 0.033%, 0.178% ± 0.057%, 0.364% ± 0.016%, and 0.438% ± 0.020% in the H, KS , 3.6 and 4.5 μm bands, respectively. We compare these with planetary atmospheric models, and find they prefer an atmosphere with a temperature inversion and inefficient heat redistribution. However, we also find that the data are equally well described by a blackbody model for the planet with T p = 2042 ± 50 K. Finally, we measure a secondary eclipse timing offset of 0.3 ± 1.3 minutes from the predicted mid-eclipse time, which constrains e = 0.0072 when combined with radial velocity data and is more consistent with a circular orbit.

Original languageEnglish (US)
Article number115
JournalAstrophysical Journal
Volume796
Issue number2
DOIs
StatePublished - Dec 1 2014

Fingerprint

eclipses
Jupiter (planet)
Jupiter
planet
atmospheres
atmosphere
planets
temperature inversion
stars
photometry
nonlinearity
cameras
dilution
temperature inversions
companion stars
stellar atmospheres
atmospheric models
circular orbits
adaptive optics
radial velocity

Keywords

  • Binaries: general
  • Infrared: planetary systems
  • Planetary systems
  • Stars: individual (HAT-P-32A, HAT-P-32B)
  • Techniques: high angular resolution
  • Techniques: photometric

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Zhao, M., O'Rourke, J. G., Wright, J. T., Knutson, H. A., Burrows, A., Fortney, J., ... Burruss, R. (2014). Characterization of the atmosphere of the hot Jupiter HAT-P-32Ab and the M-Dwarf companion HAT-P-32B. Astrophysical Journal, 796(2), [115]. https://doi.org/10.1088/0004-637X/796/2/115

Characterization of the atmosphere of the hot Jupiter HAT-P-32Ab and the M-Dwarf companion HAT-P-32B. / Zhao, Ming; O'Rourke, Joseph G.; Wright, Jason T.; Knutson, Heather A.; Burrows, Adam; Fortney, Johnathan; Ngo, Henry; Fulton, Benjamin J.; Baranec, Christoph; Riddle, Reed; Law, Nicholas M.; Muirhead, Philip S.; Hinkley, Sasha; Showman, Adam; Curtis, Jason; Burruss, Rick.

In: Astrophysical Journal, Vol. 796, No. 2, 115, 01.12.2014.

Research output: Contribution to journalArticle

Zhao, M, O'Rourke, JG, Wright, JT, Knutson, HA, Burrows, A, Fortney, J, Ngo, H, Fulton, BJ, Baranec, C, Riddle, R, Law, NM, Muirhead, PS, Hinkley, S, Showman, A, Curtis, J & Burruss, R 2014, 'Characterization of the atmosphere of the hot Jupiter HAT-P-32Ab and the M-Dwarf companion HAT-P-32B', Astrophysical Journal, vol. 796, no. 2, 115. https://doi.org/10.1088/0004-637X/796/2/115
Zhao, Ming ; O'Rourke, Joseph G. ; Wright, Jason T. ; Knutson, Heather A. ; Burrows, Adam ; Fortney, Johnathan ; Ngo, Henry ; Fulton, Benjamin J. ; Baranec, Christoph ; Riddle, Reed ; Law, Nicholas M. ; Muirhead, Philip S. ; Hinkley, Sasha ; Showman, Adam ; Curtis, Jason ; Burruss, Rick. / Characterization of the atmosphere of the hot Jupiter HAT-P-32Ab and the M-Dwarf companion HAT-P-32B. In: Astrophysical Journal. 2014 ; Vol. 796, No. 2.
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abstract = "We report secondary eclipse photometry of the hot Jupiter HAT-P-32Ab, taken with Hale/Wide-field Infra-Red Camera (WIRC) in H and KS bands and with Spitzer/IRAC at 3.6 and 4.5 μm. We carried out adaptive optics imaging of the planet host star HAT-P-32A and its companion HAT-P-32B in the near-IR and the visible. We clearly resolve the two stars from each other and find a separation of 2.″923 ± 0.″004 and a position angle 110.°64 ± 0.°12. We measure the flux ratios of the binary in g′r′i′z′ and H and KS bands, and determine T eff= 3565 ± 82 K for the companion star, corresponding to an M1.5 dwarf. We use PHOENIX stellar atmosphere models to correct the dilution of the secondary eclipse depths of the hot Jupiter due to the presence of the M1.5 companion. We also improve the secondary eclipse photometry by accounting for the non-classical, flux-dependent nonlinearity of the WIRC IR detector in the H band. We measure planet-to-star flux ratios of 0.090{\%} ± 0.033{\%}, 0.178{\%} ± 0.057{\%}, 0.364{\%} ± 0.016{\%}, and 0.438{\%} ± 0.020{\%} in the H, KS , 3.6 and 4.5 μm bands, respectively. We compare these with planetary atmospheric models, and find they prefer an atmosphere with a temperature inversion and inefficient heat redistribution. However, we also find that the data are equally well described by a blackbody model for the planet with T p = 2042 ± 50 K. Finally, we measure a secondary eclipse timing offset of 0.3 ± 1.3 minutes from the predicted mid-eclipse time, which constrains e = 0.0072 when combined with radial velocity data and is more consistent with a circular orbit.",
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AU - O'Rourke, Joseph G.

AU - Wright, Jason T.

AU - Knutson, Heather A.

AU - Burrows, Adam

AU - Fortney, Johnathan

AU - Ngo, Henry

AU - Fulton, Benjamin J.

AU - Baranec, Christoph

AU - Riddle, Reed

AU - Law, Nicholas M.

AU - Muirhead, Philip S.

AU - Hinkley, Sasha

AU - Showman, Adam

AU - Curtis, Jason

AU - Burruss, Rick

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N2 - We report secondary eclipse photometry of the hot Jupiter HAT-P-32Ab, taken with Hale/Wide-field Infra-Red Camera (WIRC) in H and KS bands and with Spitzer/IRAC at 3.6 and 4.5 μm. We carried out adaptive optics imaging of the planet host star HAT-P-32A and its companion HAT-P-32B in the near-IR and the visible. We clearly resolve the two stars from each other and find a separation of 2.″923 ± 0.″004 and a position angle 110.°64 ± 0.°12. We measure the flux ratios of the binary in g′r′i′z′ and H and KS bands, and determine T eff= 3565 ± 82 K for the companion star, corresponding to an M1.5 dwarf. We use PHOENIX stellar atmosphere models to correct the dilution of the secondary eclipse depths of the hot Jupiter due to the presence of the M1.5 companion. We also improve the secondary eclipse photometry by accounting for the non-classical, flux-dependent nonlinearity of the WIRC IR detector in the H band. We measure planet-to-star flux ratios of 0.090% ± 0.033%, 0.178% ± 0.057%, 0.364% ± 0.016%, and 0.438% ± 0.020% in the H, KS , 3.6 and 4.5 μm bands, respectively. We compare these with planetary atmospheric models, and find they prefer an atmosphere with a temperature inversion and inefficient heat redistribution. However, we also find that the data are equally well described by a blackbody model for the planet with T p = 2042 ± 50 K. Finally, we measure a secondary eclipse timing offset of 0.3 ± 1.3 minutes from the predicted mid-eclipse time, which constrains e = 0.0072 when combined with radial velocity data and is more consistent with a circular orbit.

AB - We report secondary eclipse photometry of the hot Jupiter HAT-P-32Ab, taken with Hale/Wide-field Infra-Red Camera (WIRC) in H and KS bands and with Spitzer/IRAC at 3.6 and 4.5 μm. We carried out adaptive optics imaging of the planet host star HAT-P-32A and its companion HAT-P-32B in the near-IR and the visible. We clearly resolve the two stars from each other and find a separation of 2.″923 ± 0.″004 and a position angle 110.°64 ± 0.°12. We measure the flux ratios of the binary in g′r′i′z′ and H and KS bands, and determine T eff= 3565 ± 82 K for the companion star, corresponding to an M1.5 dwarf. We use PHOENIX stellar atmosphere models to correct the dilution of the secondary eclipse depths of the hot Jupiter due to the presence of the M1.5 companion. We also improve the secondary eclipse photometry by accounting for the non-classical, flux-dependent nonlinearity of the WIRC IR detector in the H band. We measure planet-to-star flux ratios of 0.090% ± 0.033%, 0.178% ± 0.057%, 0.364% ± 0.016%, and 0.438% ± 0.020% in the H, KS , 3.6 and 4.5 μm bands, respectively. We compare these with planetary atmospheric models, and find they prefer an atmosphere with a temperature inversion and inefficient heat redistribution. However, we also find that the data are equally well described by a blackbody model for the planet with T p = 2042 ± 50 K. Finally, we measure a secondary eclipse timing offset of 0.3 ± 1.3 minutes from the predicted mid-eclipse time, which constrains e = 0.0072 when combined with radial velocity data and is more consistent with a circular orbit.

KW - Binaries: general

KW - Infrared: planetary systems

KW - Planetary systems

KW - Stars: individual (HAT-P-32A, HAT-P-32B)

KW - Techniques: high angular resolution

KW - Techniques: photometric

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