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

Abstract

Ground and space-based observations have revealed that Ultra Hot Jupiters (UHJs,~$T_{\mathrm{eq}}>2200\mathrm{K}$) typically have inverted thermal profiles, while cooler hot Jupiters have non-inverted ones. This shift is theorized due to the onset of strong optical absorbers like metal oxides (e.g., TiO, VO), metal hydrides (e.g. FeH), atomic species (e.g., Fe, Ti), and ions (e.g., H${}^{-}$). High-resolution spectroscopy is valuable for characterizing the thermal, chemical, and dynamical atmospheric structures due to its sensitivity to detailed spectral line shapes. The newly commissioned WINERED high-resolution spectrograph ($R\sim 68,000$) on the Magellan Clay 6.5 m telescope enhances capabilities with its high throughput in the J-band (1.13-1.35 $\mu$m), capturing strong spectral features from key atmospheric species. In this study, we report detecting the dayside atmosphere of the UHJ WASP-189 b at a $S/N\sim 10$, marking the first exoplanet atmosphere detection in emission with WINERED. Individually, we identify strong neutral iron (Fe) emission lines at a $S/N=6.3$, and tentatively detect neutral magnesium (Mg) and silicon (Si) at a $S/N>4$. Although not individually detected, we detect a combined set of trace species at a $S/N=7.2$, which is attributed mostly to neutral chromium (Cr) and aluminum (Al), alongside magnesium and silicon. These results help refine the understanding of key atmospheric species that influence the thermal structure of WASP-189 b and UHJs more broadly.

27 pages, 18 figures, accepted to AJ

References in corpus (61)

• Array Programming with NumPy
• The Astropy Project: Sustaining and Growing a Community-oriented Open-source Project and the Latest Major Release (v5.0) of the Core Package
• petitRADTRANS: a Python radiative transfer package for exoplanet characterization and retrieval
• On the radiative equilibrium of irradiated planetary atmospheres
• Sodium Absorption From the Exoplanetary Atmosphere of HD189733b Detected in the Optical Transmission Spectrum
• The fast spin-rotation of a young extrasolar planet
• Spectrally resolved detection of sodium in the atmosphere of HD189733b with the HARPS spectrograph
• Nightside condensation of iron in an ultra-hot giant exoplanet
• A solar C/O and sub-solar metallicity in a hot Jupiter atmosphere
• Five carbon- and nitrogen-bearing species in a hot giant planet's atmosphere
• Atmospheric Dynamics of Short-period Extra Solar Gas Giant Planets I: Dependence of Night-Side Temperature on Opacity
• Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) IV. A spectral inventory of atoms and molecules in the high-resolution transmission spectrum of WASP-121 b
• Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) - II. A broadened sodium feature on the ultra-hot giant WASP-76b
• Atmospheric Dynamics of Hot Giant Planets and Brown Dwarfs
• Hot Jupiters: Origins, Structure, Atmospheres
• Titanium oxide and chemical inhomogeneity in the atmosphere of the exoplanet WASP-189b
• ESPRESSO high resolution transmission spectroscopy of WASP-76b
• A New Window into Planet Formation and Migration: Refractory-to-Volatile Elemental Ratios in Ultra-hot Jupiters
• Decomposing the Iron Cross-Correlation Signal of the Ultra-Hot Jupiter WASP-76b in Transmission using 3D Monte-Carlo Radiative Transfer
• An Atomic Spectral Survey of WASP-76b: Resolving Chemical Gradients and Asymmetries
• Detection of neutral atomic species in the ultra-hot jupiter WASP-121b
• Understanding and Mitigating Biases when Studying Inhomogeneous Emission Spectra with JWST
• Vanadium oxide and a sharp onset of cold-trapping on a giant exoplanet
• Relative abundance constraints from high-resolution optical transmission spectroscopy of WASP-121b, and a fast model-filtering technique for accelerating retrievals
• POSEIDON: A Multidimensional Atmospheric Retrieval Code for Exoplanet Spectra
• The Roasting Marshmallows Program with IGRINS on Gemini South I: Composition and Climate of the Ultra Hot Jupiter WASP-18 b
• Breaking Degeneracies in Formation Histories by Measuring Refractory Content in Gas Giants
• Confirmation of Asymmetric Iron Absorption in WASP-76b with HARPS
• Retrieval survey of metals in six ultra-hot Jupiters: Trends in chemistry, rain-out, ionisation and atmospheric dynamics
• A Significant Increase in Detection of High-Resolution Emission Spectra Using a Three-Dimensional Atmospheric Model of a Hot Jupiter
• THOR: A New and Flexible Global Circulation Model to Explore Planetary Atmospheres
• Carbon monoxide emission lines reveal an inverted atmosphere in the ultra hot Jupiter WASP-33 b consistent with an eastward hot spot
• Spatially-resolving the terminator: Variation of Fe, temperature and winds in WASP-76 b across planetary limbs and orbital phase
• Simulating gas giant exoplanet atmospheres with Exo-FMS: Comparing semi-grey, picket fence and correlated-k radiative-transfer schemes
• The GAPS Programme at TNG. XLI. The climate of KELT-9b revealed with a new approach to high spectral resolution phase curves
• Detection of barium in the atmospheres of the ultra-hot gas giants WASP-76b and WASP-121b
• Robustness Measures for Molecular Detections using High-Resolution Transmission Spectroscopy of Exoplanets
• The Mantis Network III: Expanding the limits of chemical searches within ultra hot-Jupiters. New detections of Ca I, V I, Ti I, Cr I, Ni I, Sr II, Ba II, and Tb II in KELT-9 b
• Detection of Water Vapor in the Thermal Spectrum of the Non-Transiting Hot Jupiter upsilon Andromedae b
• CRIRES+ and ESPRESSO reveal an atmosphere enriched in volatiles relative to refractories on the ultra-hot Jupiter WASP-121b
• Mining the Ultra-Hot Skies of HAT-P-70b: Detection of a Profusion of Neutral and Ionized Species
• Black Mirror: The impact of rotational broadening on the search for reflected light from 51 Pegasi b with high resolution spectroscopy
• CRIRES+ detection of CO emissions lines and temperature inversions on the dayside of WASP-18b and WASP-76b
• Searching for the origin of the Ehrenreich effect in ultra-hot Jupiters: Evidence for strong C/O gradients in the atmosphere of WASP-76b?
• Characterisation of the upper atmospheres of HAT-P-32 b, WASP-69 b, GJ 1214 b, and WASP-76 b through their He I triplet absorption
• SimAb: A simple, fast and flexible model to assess the effects of planet formation on the atmospheric composition of gas giants
• CRIRES${}^{+}$ transmission spectroscopy of WASP-127b. Detection of the resolved signatures of a supersonic equatorial jet and cool poles in a hot planet
• Vertical structure of an exoplanet's atmospheric jet stream
• A Simple Code for Rotational Broadening of Broad Wavelength Range High-Dispersion Spectra
• The Mantis Network II: Examining the 3D high-resolution observable properties of the UHJs WASP-121b and WASP-189b through GCM modelling
• Diagnosing limb asymmetries in hot and ultra-hot Jupiters with high-resolution transmission spectroscopy
• Transmission spectroscopy of MASCARA-1b with ESPRESSO: Challenges of overlapping orbital and Doppler tracks
• Modeling the high-resolution emission spectra of clear and cloudy non-transiting hot Jupiters
• 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
• Transmission spectroscopy of the ultra-hot Jupiter MASCARA-4 b: Disentangling the hydrostatic and exospheric regimes of ultra-hot Jupiters
• A Direct Comparison between the use of Double Gray and Multiwavelength Radiative Transfer in a General Circulation Model with and without Radiatively Active Clouds
• Time Resolved Absorption of Six Chemical Species With MAROON-X Points to Strong Drag in the Ultra Hot Jupiter TOI-1518 b
• IGRINS observations of WASP-127 b: H${}_2$O, CO, and super-Solar atmospheric metallicity in the inflated sub-Saturn
• ESPRESSO reveals blueshifted neutral iron emission lines on the dayside of WASP-76 b
• Open Source High-Resolution Exoplanet Atmosphere Retrievals with POSEIDON