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

Abstract

We report secondary eclipse photometry of the hot Jupiter HAT-P-32Ab, taken with Hale/WIRC in H and Ks bands and with Spitzer/IRAC at 3.6 and 4.5 micron. 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 deg +/- 0.12 deg. We measure the flux ratios of the binary in g' r' i' z' and H & Ks bands, and determine Teff = 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 micron 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 Tp = 2042 +/- 50 K. Finally, we measure a secondary eclipse timing offset of 0.3 +/- 1.3 min from the predicted mid-eclipse time, which constrains e = 0.0072 +0.0700/-0.0064 when combined with RV data and is more consistent with a circular orbit.

arXiv comment16 pages, 12 figures. Accepted for publication in ApJ

References in corpus (60)

• Analytic Lightcurves for Planetary Transit Searches
• A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
• The Dartmouth Stellar Evolution Database
• Information criteria for astrophysical model selection
• The Tenth Data Release of the Sloan Digital Sky Survey: First Spectroscopic Data from the SDSS-III Apache Point Observatory Galactic Evolution Experiment
• Achieving better than 1 minute accuracy in the Heliocentric and Barycentric Julian Dates
• Drizzle: A Method for the Linear Reconstruction of Undersampled Images
• A Unified Theory for the Atmospheres of the Hot and Very Hot Jupiters: Two Classes of Irradiated Atmospheres
• Planet Migration and Binary Companions: the case of HD 80606b
• Obliquities of Hot Jupiter host stars: Evidence for tidal interactions and primordial misalignments
• C/O ratio as a Dimension for Characterizing Exoplanetary Atmospheres
• The Exoplanet Orbit Database
• The Statistics of Albedo and Heat Recirculation on Hot Exoplanets
• Friends of Hot Jupiters I: A Radial Velocity Search for Massive, Long-Period Companions to Close-In Gas Giant Planets
• High C/O Ratio and Weak Thermal Inversion in the Very Hot Atmosphere of Exoplanet WASP-12b
• The Stellar Populations of Praesepe and Coma Berenices
• Theoretical Spectra and Light Curves of Close-in Extrasolar Giant Planets and Comparison with Data
• A Correlation Between Stellar Activity and Hot Jupiter Emission Spectra
• A Spectroscopic Catalog of the Brightest (J<9) M Dwarfs in the Northern Sky
• Improving Galactic Center Astrometry by Reducing the Effects of Geometric Distortion
• Atmospheric Circulation of Hot Jupiters: Three-dimensional circulation models of HD 209458b and HD 189733b with Simplified Forcing
• A Systematic Retrieval Analysis of Secondary Eclipse Spectra II: A Uniform Analysis of Eight Planets and Their C to O Ratios
• Spitzer/IRAC Photometry of M, L, and T Dwarfs
• Atmospheric Heat Redistribution on Hot Jupiters
• Orbital Phase Variations of the Eccentric Giant Planet HAT-P-2b
• HAT-P-32b and HAT-P-33b: Two Highly Inflated Hot Jupiters Transiting High-Jitter Stars
• Theory for the Secondary Eclipse Fluxes, Spectra, Atmospheres, and Light Curves of Transiting Extrasolar Giant Planets
• Robotic Laser-Adaptive-Optics Imaging of 715 Kepler Exoplanet Candidates using Robo-AO
• Inflating and Deflating Hot Jupiters: Coupled Tidal and Thermal Evolution of Known Transiting Planets
• Atmospheric Characterization of the Hot Jupiter Kepler-13Ab
• On the Inference of Thermal Inversions in Hot Jupiter Atmospheres
• The optical transmission spectrum of the hot Jupiter HAT-P-32b: clouds explain the absence of broad spectral features?
• Near-infrared Thermal Emission from WASP-12b: detections of the secondary eclipse in Ks, H & J
• On the Presence of Water and Global Circulation in the Transiting Planet HD 189733b
• High-efficiency Autonomous Laser Adaptive Optics
• Near-Infrared Thermal Emission from the Hot Jupiter TrES-2b: Ground-Based Detection of the Secondary Eclipse
• Near-Infrared Thermal Emission from TrES-3b: A Ks-band detection and an H-band upper limit on the depth of the secondary eclipse
• VLT transit and occultation photometry for the bloated planet CoRoT-1b
• Ground-based detection of thermal emission from the exoplanet WASP-19b
• Adaptive Optics Images II: 12 Kepler Objects of Interest and 15 Confirmed Transiting Planets
• Ohmic Dissipation in the Interiors of Hot Jupiters
• Infrared Eclipses of the Strongly Irradiated Planet WASP-33b, and Oscillations of its Host Star
• Empirical Constraints on Trojan Companions and Orbital Eccentricities in 25 Transiting Exoplanetary Systems
• Ground-Based Transit Spectroscopy of the Hot-Jupiter WASP-19b in the Near-Infrared
• WASP-12b and HAT-P-8b are Members of Triple Star Systems
• The secondary eclipse of CoRoT-1b
• Ohmic Heating Suspends, not Reverses, the Cooling Contraction of Hot Jupiters
• A Systematic Retrieval Analysis of Secondary Eclipse Spectra III: Diagnosing Chemical Disequilibrium in Planetary Atmospheres
• Ground-based detections of thermal emission from CoRoT-1b and WASP-12b
• Broad-band transmission spectrum and K-band thermal emission of WASP-43b as observed from the ground
• The Transit Light Curve Project. X. A Christmas Transit of HD 17156b
• Transit Timing Analysis in the HAT-P-32 system
• Warm Spitzer and Palomar Near-IR Secondary Eclipse Photometry of Two Hot Jupiters: WASP-48b and HAT-P-23b
• Ground-based detections of thermal emission from the dense hot Jupiter WASP-43b in H and Ks-bands
• Mass Constraints from Eclipse Timing in Double White Dwarf Binaries
• Reciprocity Failure in HgCdTe Detectors: Measurements and Mitigation
• Secular Orbital Evolution of Compact Planet Systems
• Detection of Ks-band Thermal Emission from WASP-3b
• A ground-based Ks-band detection of the thermal emission from the transiting exoplanet WASP-4b
• Measurement of Reciprocity Failure in Near Infrared Detectors

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• Possible detection of a bimodal cloud distribution in the atmosphere of HAT-P-32\,A\,b from multi-band photometry
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