The orbital motion, absolute mass, and high-altitude winds of exoplanet HD209458b

Abstract

For extrasolar planets discovered using the radial velocity method, the spectral characterization of the host star leads to a mass-estimate of the star and subsequently of the orbiting planet. In contrast, if also the orbital velocity of the planet would be known, the masses of both star and planet could be determined directly using Newton's law of gravity, just as in the case of stellar double-line eclipsing binaries. Here we report on the detection of the orbital velocity of extrasolar planet HD209458b. High dispersion ground-based spectroscopy during a transit of this planet reveals absorption lines from carbon monoxide produced in the planet atmosphere, which shift significantly in wavelength due to the change in the radial component of the planet orbital velocity. These observations result in a mass determination of the star and planet of 1.00+-0.22 Msun and 0.64+-0.09 Mjup respectively. A ~2 km/sec blueshift of the carbon monoxide signal with respect to the systemic velocity of the host star suggests the presence of a strong wind flowing from the irradiated dayside to the non-irradiated nightside of the planet within the 0.01-0.1 mbar atmospheric pressure range probed by these observations. The strength of the carbon monoxide signal suggests a CO mixing ratio of 1-3x10-3 in this planet's upper atmosphere.

11 Pages main article and 6 pages suppl. information: A final, edited version appears in the 24 May 2010 issue of Nature

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• ExTrA: Exoplanets in Transit and their Atmospheres
• CRIRES${}^{+}$ transmission spectroscopy of WASP-127b. Detection of the resolved signatures of a supersonic equatorial jet and cool poles in a hot planet
• Exoplanet atmospheres at high resolution through a modest-size telescope. Fe II in MASCARA-2b and KELT-9b with FIES on the Nordic Optical Telescope
• Detecting Proxima b's atmosphere with JWST targeting CO2 at 15 micron using a high-pass spectral filtering technique
• NIRPS joining HARPS at ESO 3.6 m. On-sky performance and science objectives
• The Mid-infrared E-ELT Imager and Spectrograph (METIS)
• Gravity-Darkening Analysis of Misaligned Hot Jupiter MASCARA-4 b
• An M dwarf accompanied by a close-in giant orbiter with SPECULOOS
• High-Resolution Transmission Spectroscopy of the Terrestrial Exoplanet GJ 486b
• Diagnosing limb asymmetries in hot and ultra-hot Jupiters with high-resolution transmission spectroscopy
• Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) VII. Detection of sodium on the long-transiting inflated sub-Saturn KELT-11 b
• A weak spectral signature of water vapour in the atmosphere of HD 179949 b at high spectral resolution in the L-band
• A quantitative assessment of the VO line list: Inaccuracies hamper high-resolution VO detections in exoplanet atmospheres
• The obliquity and atmosphere of the ultra-hot Jupiter TOI-1431b (MASCARA-5b): A misaligned orbit and no signs of atomic ormolecular absorptions
• How to Weigh a Star Using a Moon
• No Timing Variations Observed in Third Transit of Snow-Line Exoplanet Kepler-421b
• An atlas of resolved spectral features in the transmission spectrum of WASP-189 b with MAROON-X
• Modeling the high-resolution emission spectra of clear and cloudy non-transiting hot Jupiters
• The Need for Laboratory Work to Aid in The Understanding of Exoplanetary Atmospheres
• Exploring H${}_2$O Prominence in Reflection Spectra of Cool Giant Planets
• A sub-solar metallicity on the ultra-short period planet HIP 65Ab
• Magnetic Effects and 3D Structure in Theoretical High-Resolution Transmission Spectra of Ultrahot Jupiters: the Case of WASP-76b
• Ionization and transport in partially ionized multicomponent plasmas: Application to atmospheres of hot Jupiters
• Assessing telluric correction methods for Na detections with high-resolution exoplanet transmission spectroscopy
• High-resolution emission spectroscopy retrievals of MASCARA-1b with CRIRES+: Strong detections of CO, H${}_2$O and Fe emission lines and a C$/$O consistent with solar
• Exoplanetary Monte Carlo Radiative Transfer with Correlated-k I. Benchmarking Transit and Emission Observables
• Comparing focal plane wavefront control techniques:\\Numerical simulations and laboratory experiments
• Transmission spectroscopy of the ultra-hot Jupiter MASCARA-4 b: Disentangling the hydrostatic and exospheric regimes of ultra-hot Jupiters
• A search for H$\alpha$ absorption around KELT-3 b and GJ 436 b
• Signatures of Clouds in Hot Jupiter Atmospheres: Modeled High Resolution Emission Spectra from 3D General Circulation Models
• Spectroscopic Coronagraphy for Planetary Radial Velocimetry of Exoplanets
• A Family of Phase Masks For Broadband Coronagraphy Example of the Wrapped Vortex Phase Mask Theory and Laboratory demonstration
• Doppler tomography as a tool for detecting exoplanet atmospheres
• Transmission spectroscopy of the lowest-density gas giant: metals and a potential extended outflow in HAT-P-67b
• The GAPS Programme with HARPS-N at TNG. XXXI. The WASP-33 system revisited with HARPS-N
• Exocomet Orbit Fitting: Accelerating Coma Absorption During Transits of $\beta$ Pictoris
• Detection of carbon monoxide's 4.6 micron fundamental band structure in WASP-39b's atmosphere with JWST NIRSpec G395H
• The Mantis Network I: A standard grid of templates and masks for cross-correlation analyses of ultra-hot Jupiter transmission spectra
• Simulated performance of the molecular mapping for young giant exoplanets with the Medium Resolution Spectrometer of JWST/MIRI
• Characterizing the atmospheres of transiting rocky planets around late type dwarfs
• Magnetic induction processes in Hot Jupiters, application to KELT-9b
• HAT-P-42b and HAT-P-43b. Two Inflated Transiting Hot Jupiters from the HATNet Survey
• Kepler's Dark Worlds: a Low Albedo for an Ensemble of Neptunian and Terran Exoplanets
• Neutral metals in the atmosphere of HD149026b
• Dynamics and Clouds in Planetary Atmospheres from Telescopic Observations
• Discriminating between hazy and clear hot-Jupiter atmospheres with CARMENES
• High Resolution Spectroscopy using Fabry Perot Intereferometer Arrays: An Application to Searches for O${}_2$ in Exoplanetary Atmospheres
• The hot Neptune WASP-166 b with ESPRESSO III: A blue-shifted tentative water signal constrains the presence of clouds
• Applications of a Gaussian Process Framework for Modelling of High-Resolution Exoplanet Spectra
• Experimental characterization of modal noise in multimode fibers for astronomical spectrometers
• High Resolution Spectroscopy and High Contrast Imaging with the ELT : looking for O${}_2$ in Proxima b
• The GAPS Programme at TNG. XXIX. No detection of reflected light from 51 Peg b using optical high-resolution spectroscopy
• Chemical modeling of exoplanet atmospheres
• High-resolution atmospheric retrievals of WASP-76b transmission spectroscopy with ESPRESSO: Monitoring limb asymmetries across multiple transits
• Raman Scattering by Molecular Hydrogen and Nitrogen in Exoplanetary Atmospheres
• KELT-9 as an eclipsing double-lined spectroscopic binary: a unique and self-consistent solution to the system
• High-resolution Emission Spectroscopy of the Ultrahot Jupiter KELT-9b: Little Variation in Day- and Nightside Emission Line Contrasts
• Atmospheric carbon depletion as a tracer of water oceans and biomass on temperate terrestrial exoplanets
• Mapping Exoplanets
• A Principal Component Analysis-based method to analyse high-resolution spectroscopic data
• Diffraction-limited integral-field spectroscopy for extreme adaptive optics systems with the Multi-Core fiber-fed Integral-Field Unit
• Peering above the clouds of the warm Neptune GJ 436b with CRIRES+
• The PEPSI Exoplanet Transit Survey. III: The detection of FeI, CrI and TiI in the atmosphere of MASCARA-1 b through high-resolution emission spectroscopy
• BOWIE-ALIGN: A JWST comparative survey of aligned vs misaligned hot Jupiters to test the dependence of atmospheric composition on migration history
• Time Resolved Absorption of Six Chemical Species With MAROON-X Points to Strong Drag in the Ultra Hot Jupiter TOI-1518 b
• A warm super-Neptune around the G-dwarf star TOI-1710 revealed with TESS, SOPHIE and HARPS-N
• A spectroscopic thermometer: individual vibrational band spectroscopy with the example of OH in the atmosphere of WASP-33b
• WASP-169, WASP-171, WASP-175 and WASP-182: three hot Jupiters and one bloated sub-Saturn mass planet discovered by WASP-south
• The GAPS Programme at TNG XL: A puffy and warm Neptune-sized planet and an outer Neptune-mass candidate orbiting the solar-type star TOI-1422
• Shallowness of circulation in hot Jupiters -- Advancing the Ohmic dissipation model
• A formally motivated retrieval framework applied to the high resolution transmission spectrum of HD 189733 b
• Non-Local Thermodynamic Equilibrium Transmission Spectrum Modelling of HD209458b
• Coupled Day-Night Models of Exoplanetary Atmospheres
• Remote sensing of exoplanetary atmospheres with ground-based high-resolution near-infrared spectroscopy
• Exoplanetary Geophysics -- An Emerging Discipline
• Titanium chemistry of WASP-121 b with ESPRESSO in 4-UT mode
• Predictions of planet detections with near infrared radial velocities in the up-coming SPIRou Legacy Survey-Planet Search
• Next Generation of Telescopes or Dynamics Required to Determine if Exo-Moons have Prograde or Retrograde Orbits
• Characterization of exoplanetary atmospheres with SLOPpy
• A decade of radial-velocity monitoring of Vega and new limits on the presence of planets
• Exoplanets transmission spectroscopy: accounting for eccentricity and longitude of periastron. Superwinds in the upper atmosphere of HD209458b?
• The Spin Effect on Planetary Radial Velocimetry of Exoplanets
• Resolving the Sin(I) degeneracy in Low-Mass Multi-Planet Systems
• Hot exoplanetary atmospheres in 3D
• The atmospheric composition of the ultra-hot Jupiter WASP-178 b observed with ESPRESSO
• Detection of atmospheric species and dynamics in the bloated hot Jupiter WASP-172~b with ESPRESSO
• Simulating the Multi-Epoch Direct Detection Technique to Isolate the Thermal Emission of the Non-Transiting Hot Jupiter HD187123B
• MASCARA-3b: A hot Jupiter transiting a bright F7 star in an aligned orbit
• An Interpretable Machine Learning Framework for Modeling High-Resolution Spectroscopic Data
• An absolute mass, precise age, and hints of planetary winds for WASP-121 A and b from a JWST NIRSpec phase curve
• Analytical determination of orbital elements using Fourier analysis. II. Gaia astrometry and its combination with radial velocities
• Using near infra-red spectroscopy for characterization of transiting exoplanets
• ESPRESSO reveals blueshifted neutral iron emission lines on the dayside of WASP-76 b
• Atmospheric Characterization via Broadband Color Filters on the PLAnetary Transits and Oscillations of stars (PLATO) Mission
• Multi-epoch detections of the extended atmosphere and transmission spectra of KELT-9b with a 1.5 m telescope
• IGRINS observations of WASP-127 b: H${}_2$O, CO, and super-Solar atmospheric metallicity in the inflated sub-Saturn
• A patchy CO${}_2$ exosphere on Ganymede revealed by the James Webb Space Telescope
• Probing the atmosphere of HD189733b with the Na I and K I lines
• Detection of rubidium and samarium in the atmosphere of the ultra-hot Jupiter MASCARA-4b
• Direct Spectral Detection: An Efficient Method to Detect and Characterize Binary Systems
• On mapping exoplanet atmospheres with high-dispersion spectro-polarimetry. Some model predictions
• SPORK That Spectrum: Increasing Detection Significances from High-Resolution Exoplanet Spectroscopy with Novel Smoothing Algorithms
• A closer look at LTT 9779b: The ESPRESSO endeavour to pierce the atmospheric veil
• On the Effect of Stellar Activity on Low-resolution Transit Spectroscopy and the Use of High Resolution as Mitigation
• Validation of strategies for coupling exoplanet PSFs into single-mode fibres for high-dispersion coronagraphy
• Reassessing Exoplanet Light Curves with a Thermal Model
• Developing post-coronagraphic, high-resolution spectroscopy for terrestrial planet characterization on ELTs
• BEBOP VII. SOPHIE discovery of BEBOP-3b, a circumbinary giant planet on an eccentric orbit
• Mining Planet Search Data for Binary Stars: The ${\psi }^1$ Draconis system
• Instrumentation prospects for rocky exoplanet atmospheres studies with high resolution spectroscopy
• Polarimetric investigation of selected cloud compositions in exoplanetary atmospheres
• Magnetic winding and turbulence in ultra-hot Jupiters
• New perspectives on MASCARA-1b: A combined analysis of pre- and post-eclipse emission data using CRIRES+
• Cthulhu: An Open Source Molecular and Atomic Cross Section Computation Code for Substellar Atmospheres
• Spectral signature of atmospheric winds in high resolution transit observations
• Hydride ion continuum hides absorption signatures in the NIRPS near-infrared transmission spectrum of the ultra-hot gas giant WASP-189b
• Benchmark tests of transmission spectroscopy using transiting white dwarfs
• Retrieving day- and nightside atmospheric properties of the ultra-hot Jupiter TOI-2109b. Detection of Fe and CO emission lines and evidence for inefficient heat transport
• ATMOSPHERIX: III- Estimating the C/O ratio and molecular dynamics at the limbs of WASP-76 b with SPIRou
• Exoplanet-atmospheres at high spectral resolution: A CRIRES survey of hot-Jupiters
• Correlations between laboratory line lists for FeH, CrH, and NiH and M-star spectra collected with ESPaDOnS and SPIRou
• The strange case of Na I in the atmosphere of HD209458 b: Reconciling low- and high-resolution spectroscopic observations G
• A Time-Resolved High-Resolution Spectroscopic Analysis of Ionized Calcium and Dynamical Processes in the Ultra-Hot Jupiter HAT-P-70 b
• Contrast and Temperature Dependence of Multi-Epoch High-Resolution Cross-Correlation Exoplanet Spectroscopy
• On The Synergy Between Ariel And Ground-Based High-Resolution Spectroscopy
• Quantifying the Impact of Spectral Coverage on the Retrieval of Molecular Abundances from Exoplanet Transmission Spectra
• Fibre Fabry-Pérot Astrophotonic Correlation Spectroscopy for Remote Gas Identification and Radial Velocity Measurements
• Osiris revisited: Confirming a solar metallicity and low C/O in HD 209458b
• Tighter constraints on the atmosphere of GJ 436 b from combined high-resolution CARMENES and CRIRES${}^{+}$ observations
• High-resolution spectroscopic search for the thermal emission of the extrasolar planet HD 217107 b
• A Detailed Investigation of HD 209458 b HST & JWST Transmission Spectra with SANSAR
• Exploring the atmosphere of GJ 1132 b with CRIRES+
• Hunt for Starspots in HARPS Spectra of G and K Stars
• Collapse of the general circulation in shortwave-absorbing atmospheres: an idealized model study
• High-resolution transmission spectroscopy of the hot-Saturn HD 149026b
• Illusion and Reality in the Atmospheres of Exoplanets
• The ESPRESSO transmission spectrum of HD189733b : Extracting the planetary sodium and lithium signatures amid stellar contamination
• A Transmission Spectrum Of HD 189733b From Multiple Broadband Filter Observations
• Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) VIII. Nondetection of sodium in the atmosphere of the aligned planet KELT-10b
• Exoplanet Atmospheres and Giant Ground-Based Telescopes
• Detecting H${}_2$O with CRIRES+: the case of WASP-20b
• No TiO detected in the hot Neptune-desert planet LTT-9779 b in reflected light at high spectral resolution
• PEPSI Investigation, Retrieval, and Atlas of Numerous Giant Atmospheres (PIRANGA). III. Composition and winds in the atmosphere of TOI-1518 b
• An Early Look at the Performance of IGRINS-2 at Gemini-North with Application to the ultrahot Jupiter, WASP-33 b
• Galactic planetary science
• Reinvestigation of the Multi-Epoch Direct Detections of HD 88133 b and Upsilon Andromedae b
• Detecting Atmospheric Molecules of Temperate Terrestrial Exoplanets using High-Resolution Spectroscopy in the Mid Infrared Domain
• Retrieving the transmission spectrum of HD 209458b using CHOCOLATE: A new chromatic Doppler tomography technique
• Spectroscopy using a visible photonic lantern at the Subaru telescope: Laboratory characterization and first on-sky demonstration on Ikiiki (α Leo) and `Aua (α Ori)
• Exploring the Diversity of Jupiter-Class Planets (Discussion Meeting Contribution)
• Exoplanets Sciences with Nulling Interferometers and a Single-Mode Fiber-Fed Spectrograph
• Atmospheric composition of WASP-85Ab with ESPRESSO/VLT observations
• Westward hotspot offset explained by subcritical dynamo action in an ultra-hot Jupiter atmosphere
• Detection of CO${}_2$, CO, and H${}_2$O in the atmosphere of the warm sub-Saturn HAT-P-12b
• The GAPS Programme at TNG. LXIX.The Dayside of WASP-76b revealed by GIANO-B, HARPS-N and ESPRESSO: Evidence for Three-Dimensional Atmospheric Effects
• Issues with the High Definition Space Telescope (HDST) ExoEarth Biosignature Case: A Critique of the 2015 AURA Report "From Cosmic Birth to Living Earths: the future of UVOIR Astronomy"
• Exoplanets: Possible Biosignatures
• Primary Velocity and Orbital Phase Effects on Planetary Detectability from Small Epoch Number Data Sets
• The Super-Earth Opportunity - Search for Habitable Exoplanets in the 2020s
• PEPSI Investigation, Retrieval, and Atlas of Numerous Giant Atmospheres (PIRANGA). IV. High-Resolution Phased-Resolved Spectroscopy of The Ultra Hot Jupiter KELT-20 b
• Magnetic field strengths of hot giant exoplanets consistent with Solar System values
• Molecular formation along the atmospheric mass loss of HD 209458 b and similar Hot Jupiters
• Magnetic Drag and 3-D Effects in Theoretical High-Resolution Emission Spectra of Ultrahot Jupiters: the Case of WASP-76b
• First on-sky results of a FIOS prototype, a Fabry Perot Based Instrument for Oxygen Searches
• Quantifying thermal water dissociation in the dayside photosphere of WASP-121 b using NIRPS
• Reflected light from giant planets in habitable zones: Tapping into the power of the Cross-Correlation Function
• Ground-based Atmospheric Characterization of Super-Earth L 98-59 d at High Spectral Resolution
• Open Source High-Resolution Exoplanet Atmosphere Retrievals with POSEIDON
• Machine learning for exoplanet detection in high-contrast spectroscopy Combining cross correlation maps and deep learning on medium-resolution integral-field spectra
• Maps and Masses of Transiting Exoplanets: Towards New Insights into Atmospheric and Interior Properties of Planets
• Atmospheric retrieval of Subaru/IRD high-resolution spectrum of the archetype T-type brown dwarf Gl 229 B
• Impact of MgII interstellar medium absorption on near-ultraviolet exoplanet transit measurements
• Examining the detectability of ringing on highly eccentric exoplanets
• Discovery of a second-generation planet candidate accreting onto a white dwarf
• A First Look at CRIRES+: Performance Assessment and Exoplanet Spectroscopy
• Optical and Near-IR Microwave Kinetic Inductance Detectors (MKIDs) in the 2020s
• The Study of Climate on Alien Worlds
• Revisiting the atmosphere of HAT-P-70b with CARMENES high-resolution transmission spectroscopy
• Assessing robustness and bias in 1D retrievals of 3D Global Circulation Models at high spectral resolution: a WASP-76 b simulation case study in emission
• First Results from WINERED: Detection of Emission Lines from Neutral Iron and a Combined Set of Trace Species on the Dayside of WASP-189 b
• A Measurement of the Water Abundance in the Atmosphere of the Hot Jupiter WASP-43b with High-resolution Cross-correlation Spectroscopy
• Probing the geological setting of exoplanets through atmospheric analysis: using Mars as a test case
• Bringing high-spectral resolution to VLT/SPHERE with a fibre coupling to VLT/CRIRES+
• Characterising the Atmospheres of Transiting Planets with a Dedicated Space Telescope
• The GALAH Survey: Neutron-Capture Elemental Abundances for 350,000 Gaia-RVS spectra and the Chemodynamics of Accreted Structures
• Confirmation of Fe I on MASCARA-5 b's Dayside Observed With EXPRES
• Exploring the surface of HD 189733 via Doppler shadow analysis of planetary transits
• Atmospheric characterization of HIP 67522 b with VLT/CRIRES+. VLT/CRIRES+ suggests a heavier planet and hints at deuterium fractionation
• Linking atmospheric chemistry of the hot Jupiter HD 209458b to its formation location through infrared transmission and emission spectra
• Multi-Wavelength High-Resolution Spectroscopy for Exoplanet Detection: Motivation, Instrumentation and First Results
• Day-side Fe I Emission, Day-Night Brightness Contrast and Phase Offset of the Exoplanet WASP-33b
• TOI-1518b: A Misaligned Ultra-hot Jupiter with Iron in its Atmosphere
• Low-resolution Transit Spectroscopy of Three Hot Jupiters Using the 2m Himalayan Chandra Telescope