A Transmission Spectrum Of HD 189733b From Multiple Broadband Filter Observations
arXiv:1812.03242 · doi:10.1093/mnras/sty3368
Abstract
We present new multi-broadband transit photometry of HD 189733b obtained at the Wyoming Infrared Observatory. Using an ensemble of five-band Sloan filter observations across multiple transits we have created an "ultra-low" resolution transmission spectrum to discern the nature of the exoplanet atmosphere. The observations were taken over three transit events and total 108 u', 120 g', 120 r', 110 i', and 116 z' images with an average exposure cadence of seven minutes for an entire series. The analysis was performed with a Markov-Chain Monte-Carlo method assisted by a Gaussian processes regression model. We find the apparent planet radius to increase from 0.154 +0.000920-0.00096 R* at z'-band to 0.157 +0.00074-0.00078 R* at u'-band. Whether this apparent radius implies an enhanced Rayleigh scattering or clear or grey planet atmosphere is highly dependent on stellar spot modeling assumptions, but our results are consistent with the literature for HD 189733b. This set of observations demonstrates the ability of our 2.3-m ground-based observatory to measure atmospheres of large exoplanets.
arXiv comment14 Pages, 5 Figures, 6 Tables
References in corpus (68)
- emcee: The MCMC Hammer
- The SIMBAD astronomical database
- Analytic Lightcurves for Planetary Transit Searches
- A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
- Detection of Planetary Transits Across a Sun-like Star
- Detection of an Extrasolar Planet Atmosphere
- Astrophysics Source Code Library
- batman: BAsic Transit Model cAlculatioN in Python
- A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
- Clouds in the atmosphere of the super-Earth exoplanet GJ 1214b
- Achieving better than 1 minute accuracy in the Heliocentric and Barycentric Julian Dates
- The NASA Exoplanet Archive: Data and Tools for Exoplanet Research
- The orbital motion, absolute mass, and high-altitude winds of exoplanet HD209458b
- Theoretical Transmission Spectra During Extrasolar Giant Planet Transits
- AstroImageJ: Image Processing and Photometric Extraction for Ultra-Precise Astronomical Light Curves
- AstroImageJ: Image Processing and Photometric Extraction for Ultra-Precise Astronomical Light Curves (Expanded Edition)
- Infrared Transmission Spectroscopy of the Exoplanets HD209458b and XO-1b Using the Wide Field Camera-3 on the Hubble Space Telescope
- Sodium Absorption From the Exoplanetary Atmosphere of HD189733b Detected in the Optical Transmission Spectrum
- Accurate, Empirical Radii and Masses of Planets and their Host Stars with Gaia Parallaxes
- The prevalence of dust on the exoplanet HD 189733b from Hubble and Spitzer observations
- Hubble Space Telescope Transmission Spectroscopy of the Exoplanet HD 189733b: High-altitude atmospheric haze in the optical and near-UV with STIS
- Transmission Spectra as Diagnostics of Extrasolar Giant Planet Atmospheres
- Rayleigh scattering in the transit spectrum of HD 189733b
- A ground-based transmission spectrum of the super-Earth exoplanet GJ1214b
- A population study of gaseous exoplanets
- Water Vapor in the Spectrum of the Extrasolar Planet HD 189733b: 1. the Transit
- Spectrally resolved detection of sodium in the atmosphere of HD189733b with the HARPS spectrograph
- A Gaussian process framework for modelling instrumental systematics: application to transmission spectroscopy
- Homogeneous studies of transiting extrasolar planets. III. Additional planets and stellar models
- KELT-1b: A Strongly Irradiated, Highly Inflated, Short Period, 27 Jupiter-mass Companion Transiting a mid-F Star
- A giant planet undergoing extreme ultraviolet irradiation by its hot massive-star host
- Temporal variations in the evaporating atmosphere of the exoplanet HD 189733b
- HST hot-Jupiter transmission spectral survey: detection of potassium in WASP-31b along with a cloud deck and Rayleigh scattering
- HST hot Jupiter transmission spectral survey: evidence for aerosols and lack of TiO in the atmosphere of WASP-12b
- Temperature-Pressure Profile of the hot Jupiter HD 189733b from HST Sodium Observations: Detection of Upper Atmospheric Heating
- No Thermal Inversion and a Solar Water Abundance for the Hot Jupiter HD209458b from HST WFC3 Emission Spectroscopy
- ACCESS I: An Optical Transmission Spectrum of GJ 1214b Reveals a Heterogeneous Stellar Photosphere
- High temperature condensate clouds in super-hot Jupiter atmospheres
- Quantifying and Predicting the Presence of Clouds in Exoplanet Atmospheres
- Probing the haze in the atmosphere of HD 189733b with HST/WFC3 transmission spectroscopy
- A new approach to analysing HST spatial scans: the transmission spectrum of HD 209458 b
- Rayleigh scattering by H2 in the extrasolar planet HD209458b
- 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
- GTC OSIRIS transiting exoplanet atmospheric survey: detection of sodium in XO-2b from differential long-slit spectroscopy
- The Rotation Period of the Planet-Hosting Star HD 189733
- Physical properties, transmission and emission spectra of the WASP-19 planetary system from multi-colour photometry
- Atmospheric Scintillation in Astronomical Photometry
- Optical to near-infrared transit observations of super-Earth GJ1214b: water-world or mini-Neptune?
- Rayleigh scattering in the transmission spectrum of HAT-P-18b
- Benchmarking the power of amateur observatories for TTV exoplanets detection
- Reliable inference of exoplanet light curve parameters using deterministic and stochastic systematics models
- Ground-Based Transit Spectroscopy of the Hot-Jupiter WASP-19b in the Near-Infrared
- The GTC exoplanet transit spectroscopy survey I: OSIRIS transmission spectroscopy of the short period planet WASP-43b
- The blue sky of GJ3470b: the atmosphere of a low-mass planet unveiled by ground-based photometry
- Investigating the physical properties of transiting hot Jupiters with the 1.5-m Kuiper Telescope
- Transit spectrophotometry of the exoplanet HD189733b. II. New Spitzer observations at 3.6 microns
- LRG-BEASTS III: Ground-based transmission spectrum of the gas giant orbiting the cool dwarf WASP-80
- Optical transmission photometry of the highly inflated exoplanet WASP-17b
- Gemini/GMOS Transmission Spectral Survey: Complete Optical Transmission Spectrum of the hot Jupiter WASP-4b
- The GTC exoplanet transit spectroscopy survey. VI. A spectrally-resolved Rayleigh scattering slope in GJ 3470b
- A Photometric Survey for Variables and Transits in the Field of Praesepe with KELT
- The Broadband and Spectrally-Resolved H-band Eclipse of KELT-1b and the Role of Surface Gravity in Stratospheric Inversions in Hot Jupiters
- KELT-21b: A Hot Jupiter Transiting the Rapidly-Rotating Metal-Poor Late-A Primary of a Likely Hierarchical Triple System
- Refined physical properties and g',r',i',z',J,H,K transmission spectrum of WASP-23b from the ground
- Ground-based transit observations of the super-Earth GJ 1214b
- Near-UV transit photometry of HAT-P-32 b with the LBT: Silicate aerosols in the planetary atmosphere
- A Wide-Field Camera and Fully Remote Operations at the Wyoming Infrared Observatory