Seeing above the Clouds with High Resolution Spectroscopy

Abstract

In the last decade ground based high resolution Doppler spectroscopy (HRS) has detected numerous species in transiting and non-transiting hot Jupiters, and is ideally placed for atmospheric characterisation of warm Neptunes and super Earths. Many of these cooler and smaller exoplanets have shown cloudy atmospheres from low resolution near infrared observations, making constraints on chemical species difficult. We investigate how HRS can improve on these given its sensitivity to spectral line cores which probe higher altitudes above the clouds. We model transmission spectra for the warm Neptune GJ~3470~b and determine the detectability of H${}_2$O with the CARMENES, GIANO and SPIRou spectrographs. We also model a grid of spectra for another warm Neptune, GJ~436~b, over a range of cloud-top pressure and H${}_2$O abundance. We show H${}_2$O is detectable for both planets with modest observational time and that the high H${}_2$O abundance-high cloud deck degeneracy is broken with HRS. However, meaningful constraints on abundance and cloud-top pressure are only possible in the high metallicity scenario. We also show that detections of CH${}_4$ and NH${}_3$ are possible from cloudy models of GJ~436~b. Lastly, we show how the presence of the Earth's transmission spectrum hinders the detection of H${}_2$O for the most cloudy scenarios given that telluric absorption overlaps with the strongest H${}_2$O features. The constraints possible with HRS on the molecular species can be used for compositional analysis and to study the chemical diversity of such planets in the future.

13 pages, 9 figures, accepted for publication in MNRAS, Posting of this manuscript on the arXiv was coordinated with C. Hood et al

References in corpus (91)

• The Transiting Exoplanet Survey Satellite
• Detection of Planetary Transits Across a Sun-like Star
• A continuum from clear to cloudy hot-Jupiter exoplanets without primordial water depletion
• Clouds in the atmosphere of the super-Earth exoplanet GJ 1214b
• Models of Stars, Brown Dwarfs and Exoplanets
• The orbital motion, absolute mass, and high-altitude winds of exoplanet HD209458b
• A Unified Theory for the Atmospheres of the Hot and Very Hot Jupiters: Two Classes of Irradiated Atmospheres
• A super-Earth transiting a nearby low-mass star
• Theoretical Transmission Spectra During Extrasolar Giant Planet Transits
• ExoMol molecular line lists XXX: a complete high-accuracy line list for water
• A Temperature and Abundance Retrieval Method for Exoplanet Atmospheres
• Detection of atmospheric haze on an extrasolar planet: The 0.55 - 1.05 micron transmission spectrum of HD189733b with the Hubble Space Telescope
• Chemical Equilibrium Abundances in Brown Dwarf and Extrasolar Giant Planet Atmospheres
• A Possible Bifurcation in Atmospheres of Strongly Irradiated Stars and Planets
• C/O ratio as a Dimension for Characterizing Exoplanetary Atmospheres
• The signature of orbital motion from the dayside of the planet tau Bootis b
• 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
• A Precise Water Abundance Measurement for the Hot Jupiter WASP-43b
• Rayleigh scattering in the transit spectrum of HD 189733b
• A ground-based transmission spectrum of the super-Earth exoplanet GJ1214b
• Detection of water absorption in the day side atmosphere of HD 189733 b using ground-based high-resolution spectroscopy at 3.2 microns
• The Flat Transmission Spectrum of the Super-Earth GJ1214b from Wide Field Camera 3 on the Hubble Space Telescope
• A featureless transmission spectrum for the Neptune-mass exoplanet GJ 436b
• Albedo and Reflection Spectra of Extrasolar Giant Planets
• Exoplanet Biosignatures: Understanding Oxygen as a Biosignature in the Context of Its Environment
• 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
• Nightside condensation of iron in an ultra-hot giant exoplanet
• Possible thermochemical disequilibrium in the atmosphere of the exoplanet GJ 436b
• The Effect of Condensates on the Characterization of Transiting Planet Atmospheres with Transmission Spectroscopy
• H- Opacity and Water Dissociation in the Dayside Atmosphere of the Very Hot Gas Giant WASP-18 b
• Compositional diversity in the atmospheres of hot Neptunes, with application to GJ 436b
• Retrieving Temperatures and Abundances of Exoplanet Atmospheres with High-Resolution Cross-Correlation Spectroscopy
• Finding extraterrestrial life using ground-based high-resolution spectroscopy
• Extremely Irradiated Hot Jupiters: Non-Oxide Inversions, H- Opacity, and Thermal Dissociation of Molecules
• How to Characterize Habitable Worlds and Signs of Life
• ExoMol molecular line lists XXXV: a rotation-vibration line list for hot ammonia
• A Sub-Neptune Exoplanet with a Low-Metallicity Methane-Depleted Atmosphere and Mie-Scattering Clouds
• Model atmospheres of irradiated exoplanets: The influence of stellar parameters, metallicity, and the C/O ratio
• A spectral survey of an ultra-hot Jupiter: Detection of metals in the transmission spectrum of KELT-9 b
• Detection of carbon monoxide in the high-resolution day-side spectrum of the exoplanet HD 189733b
• An accurate, extensive, and practical line list of methane for the HITEMP database
• Detection of H2O and evidence for TiO/VO in an ultra hot exoplanet atmosphere
• H${}_2$O abundances and cloud properties in ten hot giant exoplanets
• HAT-P-26b: A Neptune-Mass Exoplanet with a Well Constrained Heavy Element Abundance
• Hubble Space Telescope Near-IR Transmission Spectroscopy of the Super-Earth HD 97658b
• Detection of Fe I in the atmosphere of the ultra-hot Jupiter WASP-121b, and a new likelihood-based approach for Doppler-resolved spectroscopy
• A consistent retrieval analysis of 10 Hot Jupiters observed in transmission
• The Deep Blue Color of HD189733b: Albedo Measurements with Hubble Space Telescope/Space Telescope Imaging Spectrograph at Visible Wavelengths
• Spatially resolved eastward winds and rotation of HD 189733b
• No Thermal Inversion and a Solar Water Abundance for the Hot Jupiter HD209458b from HST WFC3 Emission Spectroscopy
• The Complete transmission spectrum of WASP-39b with a precise water constraint
• High-Resolution Spectroscopic Detection of TiO and Stratosphere in the Day-side of WASP-33b
• Feasibility Studies for the Detection of $O_2$ in an Earth-like Exoplanet
• Detection of molecular absorption in the dayside of exoplanet 51 Pegasi b?
• H2O abundances in the atmospheres of three hot Jupiters
• Retrieval of planetary and stellar properties in transmission spectroscopy with Aura
• Discovery of water at high spectral resolution in the atmosphere of 51 Peg b
• Probing the haze in the atmosphere of HD 189733b with HST/WFC3 transmission spectroscopy
• GENESIS: New Self-Consistent Models of Exoplanetary Spectra
• Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) - II. A broadened sodium feature on the ultra-hot giant WASP-76b
• Near-IR Direct Detection of Water Vapor in Tau Boo b
• A framework to combine low- and high-resolution spectroscopy for the atmospheres of transiting exoplanets
• Exoplanet atmospheres with GIANO. I. Water in the transmission spectrum of HD 189733b
• On the robustness of analysis techniques for molecular detections using high resolution exoplanet spectroscopy
• On degeneracies in retrievals of exoplanetary transmission spectra
• Evidence for a Dayside Thermal Inversion and High Metallicity for the Hot Jupiter WASP-18b
• Detection of neutral atomic species in the ultra-hot jupiter WASP-121b
• Exoplanet atmospheres with GIANO II. Detection of molecular absorption in the dayside spectrum of HD 102195b
• Polarized reflected light from the exoplanet HD189733b: First multicolor observations and confirmation of detection
• New Avenues for Thermal Inversions in hot Jupiters
• Water vapor in the spectrum of the extrasolar planet HD 189733b: 2. The eclipse
• Evidence for multiple molecular species in the hot Jupiter HD 209458b
• An emission spectrum for WASP-121b measured across the 0.8-1.1 micron wavelength range using the Hubble Space Telescope
• Optical phase curve of the ultra-hot Jupiter WASP-121b
• Multiple water band detections in the CARMENES near-infrared transmission spectrum of HD 189733 b
• Water vapor detection in the transmission spectra of HD 209458 b with the CARMENES NIR channel
• Molecular Cross Sections for High Resolution Spectroscopy of Super Earths, Warm Neptunes and Hot Jupiters
• Confirmation of water emission in the dayside spectrum of the ultrahot Jupiter WASP-121b
• HyDRA-H: Simultaneous Hybrid Retrieval of Exoplanetary Emission Spectra
• A Hubble PanCET Study of HAT-P-11b: A Cloudy Neptune with a Low Atmospheric Metallicity
• Evidence for the Direct Detection of the Thermal Spectrum of the Non-Transiting Hot Gas Giant HD 88133 b
• Detection of Water Vapor in the Thermal Spectrum of the Non-Transiting Hot Jupiter upsilon Andromedae b
• Optimizing Ground-based Observations of O2 in Earth Analogs
• Aluminium oxide in the atmosphere of hot Jupiter WASP-43b
• H- and Dissociation in Ultra-hot Jupiters: A Retrieval Case Study of WASP-18b
• The PHOENIX Exoplanet Retrieval Algorithm and Using H${}^{-}$ Opacity as a Probe in Ultra-hot Jupiters
• A weak spectral signature of water vapour in the atmosphere of HD 179949 b at high spectral resolution in the L-band
• High Resolution Spectroscopy and High Contrast Imaging with the ELT : looking for O${}_2$ in Proxima b
• Simulating the Multi-Epoch Direct Detection Technique to Isolate the Thermal Emission of the Non-Transiting Hot Jupiter HD187123B

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• Signatures of Clouds in Hot Jupiter Atmospheres: Modeled High Resolution Emission Spectra from 3D General Circulation Models
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• The hot Neptune WASP-166 b with ESPRESSO III: A blue-shifted tentative water signal constrains the presence of clouds
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• Characterization of exoplanetary atmospheres with SLOPpy
• Water observed in the atmosphere of τ Bootis Ab with CARMENES/CAHA
• Instrumentation prospects for rocky exoplanet atmospheres studies with high resolution spectroscopy
• On The Synergy Between Ariel And Ground-Based High-Resolution Spectroscopy
• Tighter constraints on the atmosphere of GJ 436 b from combined high-resolution CARMENES and CRIRES${}^{+}$ observations
• No TiO detected in the hot Neptune-desert planet LTT-9779 b in reflected light at high spectral resolution
• Diversity of Exoplanets
• Ground-based Atmospheric Characterization of Super-Earth L 98-59 d at High Spectral Resolution
• Primary Velocity and Orbital Phase Effects on Planetary Detectability from Small Epoch Number Data Sets
• Grain Growth in Escaping Atmospheres: Implications for the Radius Inflation of Super-Puffs