TOI-2498 b: A hot bloated super-Neptune within the Neptune desert
arXiv:2305.06950 · doi:10.1093/mnras/stad1452
Abstract
We present the discovery and confirmation of a transiting hot, bloated Super-Neptune using photometry from TESS and LCOGT and radial velocity measurements from HARPS. The host star TOI-2498 is a V = 11.2, G-type (T = 5905 12K) solar-like star with a mass of 1.12 0.02 M and a radius of 1.26 0.04 R. The planet, TOI-2498 b, orbits the star with a period of 3.7 days, has a radius of 6.1 0.3 R, and a mass of 35 4 M. This results in a density of 0.86 0.25 g cm. TOI-2498 b resides on the edge of the Neptune desert; a region of mass-period parameter space in which there appears to be a dearth of planets. Therefore TOI-2498 b is an interesting case to study to further understand the origins and boundaries of the Neptune desert. Through modelling the evaporation history, we determine that over its 3.6 Gyr lifespan, TOI-2498 b has likely reduced from a Saturn sized planet to its current radius through photoevaporation. Moreover, TOI-2498 b is a potential candidate for future atmospheric studies searching for species like water or sodium in the optical using high-resolution, and for carbon based molecules in the infra-red using JWST.
arXiv comment13 pages, 11 figures, accepted for publication in MNRAS
References in corpus (67)
- Maps of Dust IR Emission for Use in Estimation of Reddening and CMBR Foregrounds
- Astropy: A Community Python Package for Astronomy
- The Astropy Project: Building an inclusive, open-science project and status of the v2.0 core package
- A new extensive library of PHOENIX stellar atmospheres and synthetic spectra
- Accurate masses and radii of normal stars: modern results and applications
- Las Cumbres Observatory Global Telescope Network
- Kepler Presearch Data Conditioning II - A Bayesian Approach to Systematic Error Correction
- Efficient, uninformative sampling of limb darkening coefficients for two-parameter laws
- The stellar activity-rotation relationship and the evolution of stellar dynamos
- Kepler Presearch Data Conditioning I - Architecture and Algorithms for Error Correction in Kepler Light Curves
- Kepler planets: a tale of evaporation
- The evaporation valley in the Kepler planets
- AstroImageJ: Image Processing and Photometric Extraction for Ultra-Precise Astronomical Light Curves (Expanded Edition)
- AstroImageJ: Image Processing and Photometric Extraction for Ultra-Precise Astronomical Light Curves
- Growth Model Interpretation of Planet Size Distribution
- Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program.Galactic stellar populations and planets
- The Transiting Exoplanet Survey Satellite: Simulations of planet detections and astrophysical false positives
- Roche lobe effects on the atmospheric loss of "Hot Jupiters"
- Accurate, Empirical Radii and Masses of Planets and their Host Stars with Gaia Parallaxes
- Mass-Radius Relation for Rocky Planets based on PREM
- How Thermal Evolution and Mass Loss Sculpt Populations of Super-Earths and Sub-Neptunes: Application to the Kepler-11 System and Beyond
- The TESS Objects of Interest Catalog from the TESS Prime Mission
- Planetary population synthesis coupled with atmospheric escape: a statistical view of evaporation
- Dearth of short-period Neptunian exoplanets - a desert in period-mass and period-radius planes
- STARRY: Analytic Occultation Light Curves
- Kepler Data Validation I -- Architecture, Diagnostic Tests, and Data Products for Vetting Transiting Planet Candidates
- A new list of thorium and argon spectral lines in the visible
- SWEET-Cat: A catalogue of parameters for Stars With ExoplanETs I. New atmospheric parameters and masses for 48 stars with planets
- Super-Earth Atmospheres: Self-Consistent Gas Accretion and Retention
- Parallax Systematics and Photocenter Motions of Benchmark Eclipsing Binaries in Gaia EDR3
- Hot super-Earths stripped by their host stars
- Planetary nebulae seen with TESS: Discovery of new binary central star candidates from Cycle 1
- The active lives of stars: a complete description of rotation and XUV evolution of F, G, K, and M dwarfs
- Kepler Data Validation II -- Transit Model Fitting and Multiple-Planet Search
- Real-time processing of the imaging data from the network of Las Cumbres Observatory Telescopes using BANZAI
- Revisited Mass-Radius relations for exoplanets below 120 Earth masses
- Photoevaporation and High-Eccentricity Migration Created the Sub-Jovian Desert
- SOAR TESS Survey. I: Sculpting of TESS planetary systems by stellar companions
- Evolutionary Analysis of Gaseous Sub-Neptune-Mass Planets with MESA
- ARES v2 - new features and improved performance
- A short-period censor of sub-Jupiter mass exoplanets with low density
- Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program II: Cu, Zn, Sr, Y, Zr, Ba, Ce, Nd and Eu
- Eclipsing Binary Stars as Benchmarks for Trigonometric Parallaxes in the Gaia Era
- Signatures of the Core-Powered Mass-Loss Mechanism in the Exoplanet Population: Dependence on Stellar Properties and Observational Predictions
- Ten years of speckle interferometry at SOAR
- Emerging Trends in a Period-Radius Distribution of Close-in Planets
- Empirical, Accurate Masses and Radii of Single Stars with TESS and Gaia
- Analytic Planetary Transit Light Curves and Derivatives for Stars with Polynomial Limb Darkening
- Abundance to age ratios in the HARPS-GTO sample with Gaia DR2: Chemical clocks for a range of [Fe/H]
- Overcoming the limitations of the energy-limited approximation for planet atmospheric escape
- Oxygen abundances in G- and F-type stars from HARPS
- ARES+MOOG - a practical overview of an EW method to derive stellar parameters
- Identifying the best iron-peak and -capture elements for chemical tagging: The impact of the number of lines on measured scatter
- XUV exposed, non-hydrostatic hydrogen-rich upper atmospheres of terrestrial planets II: Hydrogen coronae and ion escape
- New Formation Models for the Kepler-36 System
- Chemical abundances of 1111 FGK stars from the HARPS GTO planet search program IV. Carbon and C/O ratios for Galactic stellar populations and planet hosts
- The discovery of WASP-151b, WASP-153b, WASP-156b: Insights on giant planet migration and the upper boundary of the Neptunian desert
- HATS-7b: A Hot Super Neptune Transiting a Quiet K Dwarf Star
- A Closer Look at Exoplanet Occurrence Rates: Considering the Multiplicity of Stars Without Detected Planets
- WASP-166b: a bloated super-Neptune transiting a V = 9 star
- A possible correlation between planetary radius and orbital period for small planets
- Commissioning ShARCS: the Shane Adaptive optics infraRed Camera-Spectrograph for the Lick Observatory 3-m telescope
- The Hot Neptune WASP-166 b with ESPRESSO II: Confirmation of atmospheric sodium
- The hot Neptune WASP-166 b with ESPRESSO III: A blue-shifted tentative water signal constrains the presence of clouds
- The shared evaporation history of three sub-Neptunes spanning the radius-period valley of a Hyades star
- HATS-37Ab and HATS-38b: Two Transiting Hot Neptunes in the Desert
- VaTEST I: Validation of Sub-Saturn Exoplanet TOI-181b in Narrow Orbit from its Host Star