Possible detection of a bimodal cloud distribution in the atmosphere of HAT-P-32\,A\,b from multi-band photometry
arXiv:1712.00415 · doi:10.1093/mnras/stx3147
Abstract
We present high-precision photometry of eight separate transit events in the HAT-P-32 planetary system. One transit event was observed simultaneously by two telescopes of which one obtained a simultaneous multi-band light curve in three optical bands, giving a total of 11 transit light curves. Due to the filter selection and in conjunction with using the defocussed photometry technique we were able to obtain an extremely high precision, ground-based transit in the \textit{u}-band (350\,nm), with an rms scatter of \,mmag. All 11 transits were modelled using \textsc{prism} and \textsc{gemc}, and the physical properties of the system calculated. We find the mass and radius of the host star to be $1.182\pm 0.041\Msun$ and $1.225\pm0.015\Rsun$, respectively. For the planet we find a mass of $0.80\pm 0.14\Mjup$, a radius of $1.807\pm0.022\Rjup$ and a density of $0.126\pm0.023\pjup$. These values are consistent with those found in the literature. We also obtain a new orbital ephemeris for the system . We measured the transmission spectrum of HAT-P-32\,A\,b and compared it to theoretical transmission spectra. Our results indicate a bimodal cloud particle distribution consisting of Rayleigh--like haze and grey absorbing cloud particles within the atmosphere of HAT-P-32\,A\,b.
arXiv comment17 pages, 7 figures and 8 tables. Accepted for publication in MNRAS on 2017 November 29
References in corpus (68)
- Detection of an Extrasolar Planet Atmosphere
- The WASP Project and the SuperWASP Cameras
- SparsePak: A Formatted Fiber Field Unit for The WIYN Telescope Bench Spectrograph. I. Design, Construction, and Calibration
- A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
- Precipitating Condensation Clouds in Substellar Atmospheres
- A Unified Theory for the Atmospheres of the Hot and Very Hot Jupiters: Two Classes of Irradiated Atmospheres
- Theoretical Transmission Spectra During Extrasolar Giant Planet Transits
- Defining and cataloging exoplanets: The exoplanet.eu database
- A Temperature and Abundance Retrieval Method for Exoplanet Atmospheres
- Wide-field millimagnitude photometry with HAT: A Tool for Extra-solar Planet Detection
- Homogeneous studies of transiting extrasolar planets. IV. Thirty systems with space-based light curves
- A Possible Bifurcation in Atmospheres of Strongly Irradiated Stars and Planets
- Hubble Space Telescope Transmission Spectroscopy of the Exoplanet HD 189733b: High-altitude atmospheric haze in the optical and near-UV with STIS
- Rayleigh scattering in the transit spectrum of HD 189733b
- GROND - a 7-channel imager
- Homogeneous studies of transiting extrasolar planets. I. Light curve analyses
- Modeling optical properties of cosmic dust grains using a distribution of hollow spheres
- Transmission Spectra of Three-Dimensional Hot Jupiter Model Atmospheres
- The Effect of Condensates on the Characterization of Transiting Planet Atmospheres with Transmission Spectroscopy
- Homogeneous studies of transiting extrasolar planets. III. Additional planets and stellar models
- Theoretical Spectra and Atmospheres of Extrasolar Giant Planets
- Model atmospheres of irradiated exoplanets: The influence of stellar parameters, metallicity, and the C/O ratio
- HST hot-Jupiter transmission spectral survey: detection of potassium in WASP-31b along with a cloud deck and Rayleigh scattering
- Spectrophotometric Libraries, Revised Photonic Passbands and Zero-points for UBVRI, Hipparcos and Tycho Photometry
- High-precision photometry by telescope defocussing. I. The transiting planetary system WASP-5
- HST hot Jupiter Transmission Spectral Survey: A detection of Na and strong optical absorption in HAT-P-1b
- Observing transiting planets with JWST -- Prime targets and their synthetic spectral observations
- HST hot Jupiter transmission spectral survey: evidence for aerosols and lack of TiO in the atmosphere of WASP-12b
- HAT-P-32b and HAT-P-33b: Two Highly Inflated Hot Jupiters Transiting High-Jitter Stars
- Constraining Exoplanet Mass from Transmission Spectroscopy
- Homogeneous studies of transiting extrasolar planets. II. Physical properties
- HST hot-Jupiter transmission spectral survey: Haze in the atmosphere of WASP-6b
- Transits and starspots in the WASP-19 planetary system
- Photometric and Spectral Signatures of 3D Models of Transiting Giant Exoplanets
- Adaptive Optics Images of Kepler Objects of Interest
- On the orbit of the short-period exoplanet WASP-19b
- VLT FORS2 comparative transmission spectroscopy: Detection of Na in the atmosphere of WASP-39b from the ground
- Ground-based near-UV observations of 15 transiting exoplanets: Constraints on their atmospheres and no evidence for asymmetrical transits
- The optical transmission spectrum of the hot Jupiter HAT-P-32b: clouds explain the absence of broad spectral features?
- Extrasolar Planet Transits Observed at Kitt Peak National Observatory
- Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry
- High-precision photometry by telescope defocussing. II. The transiting planetary system WASP-4
- HST hot-Jupiter transmission spectral survey: Clear skies for cool Saturn WASP-39b
- Adaptive Optics Images II: 12 Kepler Objects of Interest and 15 Confirmed Transiting Planets
- High-precision photometry by telescope defocussing. VI. WASP-24, WASP-25 and WASP-26
- Transits and starspots in the WASP-6 planetary system
- A lower radius and mass for the transiting extrasolar planet HAT-P-8b
- High-precision photometry by telescope defocussing. VII. The ultra-short period planet WASP-103
- Physical properties, starspot activity, orbital obliquity, and transmission spectrum of the Qatar-2 planetary system from multi-colour photometry
- Broad-band transmission spectrum and K-band thermal emission of WASP-43b as observed from the ground
- Physical properties and radius variations in the HAT-P-5 planetary system from simultaneous four-colour photometry
- Transit Timing Analysis in the HAT-P-32 system
- Adaptive Optics Images III: 87 Kepler Objects of Interest
- Transmission spectroscopy of HAT-P-32b with the LBT: confirmation of clouds/hazes in the planetary atmosphere
- Characterization of the atmosphere of the hot Jupiter HAT-P-32Ab and the M-dwarf companion HAT-P-32B
- Near-UV and optical observations of the transiting exoplanet TrES-3b
- Challenges to Constraining Exoplanet Masses via Transmission Spectroscopy
- The GTC exoplanet transit spectroscopy survey. IV. Confirmation of the flat transmission spectrum of HAT-P-32b
- Multi-filter transit observations of WASP-39b and WASP-43b with three San Pedro Mártir telescopes
- An extremely high photometric precision in ground-based observations of two transits in the WASP-50 planetary system
- Young Exoplanet Transit Initiative (YETI)
- Physical properties of the WASP-44 planetary system from simultaneous multi-colour photometry
- Broad-band spectrophotometry of HAT-P-32 b: Search for a scattering signature in the planetary spectrum
- Refined physical properties and g',r',i',z',J,H,K transmission spectrum of WASP-23b from the ground
- An optical transmission spectrum of the transiting hot Jupiter in the metal-poor WASP-98 planetary system
- Physical properties of the HAT-P-23 and WASP-48 planetary systems from multi-colour photometry
- Larger and faster: revised properties and a shorter orbital period for the WASP-57 planetary system from a pro-am collaboration
- Multi-filter transit observations of HAT-P-3b and TrES-3b with multiple Northern Hemisphere telescopes
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- ExoClock Project III: 450 new exoplanet ephemerides from ground and space observations
- H and He I absorption in HAT-P-32 b observed with CARMENES -- Detection of Roche lobe overflow and mass loss
- ExoClock project II: A large-scale integrated study with 180 updated exoplanet ephemerides
- From cold to hot irradiated gaseous exoplanets: Toward an observation-based classification scheme
- Low albedos of hot to ultra-hot Jupiters in the optical to near-infrared transition regime
- Dust in brown dwarfs and extra-solar planets. VII. Cloud formation in diffusive atmospheres
- The HST PanCET Program: An Optical to Infrared Transmission Spectrum of HAT-P-32Ab
- Physical properties and transmission spectrum of the WASP-74 planetary system from multi-band photometry
- Stellar Magnetic Activity and "Butterfly Diagram" of Kepler-63
- Homogeneous Transit Timing Analyses of Ten Exoplanet Systems
- Role of the impact parameter in exoplanet transmission spectroscopy
- Simulations of starspot anomalies within TESS exoplanetary transit light curves -- I. The detection limits of starspot anomalies in TESS light curves
- Physical properties and optical-infrared transmission spectrum of the giant planet XO-1b
- Simulations of starspot anomalies within TESS exoplanetary transit light curves -- II
- A Two-limb Explanation for the Optical-to-infrared Transmission Spectrum of the Hot Jupiter HAT-P-32Ab
- Using Stellar Spectral Energy Distributions to Measure Exoplanet Parameters