Five new hot-Jupiter transits investigated with Swift-UVOT

Abstract

Short wavelength exoplanet transit measurements have been used to probe mass-loss in exoplanet atmospheres. We present the Swift-UVOT transit light curves for five hot Jupiters orbiting UV-bright F-type stars: XO-3, KELT-3, WASP-3, WASP-62, and HAT-P-6. We report one positive transit detection of XO-3b and one marginal detection of KELT-3b. We place upper limits on the remaining three transit depths. The planetary radii derived from the NUV transit depths of both potential detections are 50-100% larger than their optical radius measurements. We examine the ratio $R_{\mathrm{NUV}}/R_{\mathrm{opt}}$ for trends as a function of estimated mass-loss rate, which we derive from X-ray luminosity obtained from the Swift-XRT, or XMM-Newton in the case of WASP-62. We find no correlation between the energy-limited photoevaporative mass-loss rate and the $R_{\mathrm{NUV}}/R_{\mathrm{opt}}$ ratio. We also search for trends based on the equilibrium temperature of the hot Jupiters. We find a possible indication of a transition in the $R_{\mathrm{NUV}}/R_{\mathrm{opt}}$ ratio around $T_{\mathrm{eq}}=1700\mathrm{K}$, analogous to the trends found for NIR water features in transmission spectra. This might be explained by the formation of extended cloud decks with silicate particles $\le 1\mu \mathrm{m}$. We demonstrate that the Swift-UVOT filters could be sensitive to absorption from aerosols in exoplanet atmospheres.

arXiv commentAccepted to AAS Journals

References in corpus (78)

• emcee: The MCMC Hammer
• Gaia Data Release 2. Summary of the contents and survey properties
• The Gaia mission
• On the Absorption of X-rays in the Interstellar Medium
• Binary companions of evolved stars in APOGEE DR14: Search method and catalog of ~5,000 companions
• Collisional Plasma Models with APEC/APED: Emission Line Diagnostics of Hydrogen-like and Helium-like Ions
• Infrared Emission from Interstellar Dust. II. The Diffuse Interstellar Medium
• Detection of an Extrasolar Planet Atmosphere
• batman: BAsic Transit Model cAlculatioN in Python
• A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
• A giant comet-like cloud of hydrogen escaping the warm Neptune-mass exoplanet GJ 436b
• Roche lobe effects on the atmospheric loss of "Hot Jupiters"
• Neglected Clouds in T and Y Dwarf Atmospheres
• 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
• Evaporation of the planet HD189733b observed in HI Lyman-alpha
• The GAPS Programme with HARPS-N@TNG XIV. Investigating giant planet migration history via improved eccentricity and mass determination for 231 transiting planets
• Exoplanetary Atmospheres: Key Insights, Challenges and Prospects
• The Transit Light Curve Project. IX. Evidence for a Smaller Radius of the Exoplanet XO-3b
• Lack of Inflated Radii for Kepler Giant Planet Candidates Receiving Modest Stellar Irradiation
• Lyman-$\alpha$ Transit Spectroscopy and the Neutral Hydrogen Tail of the Hot Neptune GJ436b
• Temporal variations in the evaporating atmosphere of the exoplanet HD 189733b
• WASP-3b: a strongly-irradiated transiting gas-giant planet
• Aerosol Composition of Hot Giant Exoplanets Dominated by Silicates and Hydrocarbon Hazes
• Misaligned spin-orbit in the XO-3 planetary system?
• WASP-121 b: a hot Jupiter in a polar orbit and close to tidal disruption
• Hubble PanCET: An extended upper atmosphere of neutral hydrogen around the warm Neptune GJ 3470 b
• The HST PanCET Program: Exospheric Mg II and Fe II in the Near-UV transmission spectrum of WASP-121b using Jitter Decorrelation
• XO-3b: A Massive Planet in an Eccentric Orbit Transiting an F5V Star
• Seven transiting hot-Jupiters from WASP-South, Euler and TRAPPIST: WASP-47b, WASP-55b, WASP-61b, WASP-62b, WASP-63b, WASP-66b & WASP-67b
• High temperature condensate clouds in super-hot Jupiter atmospheres
• The Transit Light Source Effect II: The Impact of Stellar Heterogeneity on Transmission Spectra of Planets Orbiting Broadly Sun-like Stars
• New observations of the extended hydrogen exosphere of the extrasolar planet HD209458b
• Extrasolar Giant Planets and X-ray Activity
• Probing X-ray Absorption and Optical Extinction in the Interstellar Medium Using Chandra Observations of Supernova Remnants
• Magnesium in the atmosphere of the planet HD209458b: Observations of the thermosphere-exosphere transition region
• On the Spin-Orbit Misalignment of the XO-3 Exoplanetary System
• Overcoming the limitations of the energy-limited approximation for planet atmospheric escape
• Transit observations of the Hot Jupiter HD 189733b at X-ray wavelengths
• Formation of Silicate and Titanium Clouds on Hot Jupiters
• Minerva-Australis I: Design, Commissioning, & First Photometric Results
• Exo-Transmit: An Open-Source Code for Calculating Transmission Spectra for Exoplanet Atmospheres of Varied Composition
• Theoretical transmission spectra of exoplanet atmospheres with hydrocarbon haze: Effect of creation, growth, and settling of haze particles. I. Model description and first results
• Transit Signatures of Inhomogeneous Clouds on Hot Jupiters: Insights From Microphysical Cloud Modeling
• The mineral clouds on HD 209458b and HD189733b
• HAT-P-6b: A Hot Jupiter transiting a bright F star
• Statistical Characterization of Hot Jupiter Atmospheres using Spitzer's Secondary Eclipses
• Statistical Analysis of Hubble/WFC3 Transit Spectroscopy of Extrasolar Planets
• Rossiter--McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems
• Optical phase curve of the ultra-hot Jupiter WASP-121b
• Exoplanet Transit Variability: Bow Shocks and Winds Around HD 189733b
• EUV irradiation of exoplanet atmospheres occurs on Gyr timescales
• System parameters, transit times and secondary eclipse constraints of the exoplanet systems HAT-P-4, TrES-2, TrES-3 and WASP-3 from the NASA EPOXI Mission of Opportunity
• Understanding the atmospheric properties and chemical composition of the ultra-hot Jupiter HAT-P-7b: I. Cloud and chemistry mapping
• KELT-3b: A Hot Jupiter Transiting a V=9.8 Late-F Star
• 3D simulations of photochemical hazes in the atmosphere of hot Jupiter HD 189733b
• Unveiling cloudy exoplanets: the influence of cloud model choices on retrieval solutions
• The GAPS Programme with HARPS-N at TNG. XIII. The orbital obliquity of three close-in massive planets hosted by dwarf K-type stars: WASP-43, HAT-P-20 and Qatar-2
• Evolution of atmospheric escape in close-in giant planets and their associated Ly$\alpha$ and H$\alpha$ transit predictions
• The XUV environments of exoplanets from Jupiter-size to super-Earth
• Photochemistry in hot H2-dominated exoplanet atmospheres
• Thermal Emission and Tidal Heating of the Heavy and Eccentric Planet XO-3b
• Near-ultraviolet Transmission Spectroscopy of HD 209458b: Evidence of Ionized Iron Beyond the Planetary Roche Lobe
• Theoretical Radii of Extrasolar Giant Planets: the Cases of TrES-4, XO-3b, and HAT-P-1b
• Transiting the Sun: The impact of stellar activity on X-ray and ultraviolet transits
• Investigation of the environment around close-in transiting exoplanets using CLOUDY
• Swift UVOT near-UV transit observations of WASP-121 b
• UV Exoplanet Transmission Spectral Features as Probes of Metals and Rainout
• Constraints on the Atmospheric Circulation and Variability of the Eccentric Hot Jupiter XO-3b
• Mineral cloud and hydrocarbon haze particles in the atmosphere of the hot Jupiter JWST target WASP-43b
• Detection of Ks-band Thermal Emission from WASP-3b
• Transiting the Sun II: The impact of stellar activity on Lyman-$\alpha$ transits
• The MgI line: a new probe of the atmospheres of evaporating exoplanets
• Evidence of a Clear Atmosphere for WASP-62b: the Only Known Transiting Gas Giant in the JWST Continuous Viewing Zone
• A search for H$\alpha$ absorption around KELT-3 b and GJ 436 b
• Discriminating between hazy and clear hot-Jupiter atmospheres with CARMENES
• Non-Local Thermodynamic Equilibrium Transmission Spectrum Modelling of HD209458b
• The near-UV transit of HD 189733b with the XMM-Newton Optical Monitor

Cited by in corpus (1)

• Exoplanet weather and climate regimes with clouds and thermal ionospheres: A model grid study in support of large-scale observational campaigns