The MOPYS project: A survey of 70 planets in search of extended He I and H atmospheres. No evidence of enhanced evaporation in young planets

Abstract

During the first Gyr of their life, exoplanet atmospheres suffer from different atmospheric escape phenomena that can strongly affect the shape and morphology of the exoplanet itself. These processes can be studied with Ly$\alpha$, H$\alpha$ and/or He I triplet observations. We present high-resolution spectroscopy observations from CARMENES and GIARPS checking for He I and H$\alpha$ signals in 20 exoplanetary atmospheres: V1298Tau c, K2-100b, HD63433b, HD63433c, HD73583b, HD73583c, K2-77b, TOI-2076b, TOI-2048b, HD235088b, TOI-1807b, TOI-1136d, TOI-1268b, TOI-1683b, TOI-2018b, MASCARA-2b, WASP-189b, TOI-2046b, TOI-1431b, and HAT-P-57b. We report two new high-resolution spectroscopy He I detections for TOI-1268b and TOI-2018b, and an H$\alpha$ detection for TOI-1136d. The MOPYS (Measuring Out-flows in Planets orbiting Young Stars) project aims to understand the evaporating phenomena and test their predictions from the current observations. We compiled a list of 70 exoplanets with He I and/or H$\alpha$ observations, from this work and the literature, and we considered the He I and H$\alpha$ results as proxy for atmospheric escape. Our principal results are that 0.1-1Gyr-old planets do not exhibit more He I or H$\alpha$ detections than older planets, and evaporation signals are more frequent for planets orbiting $\sim$1-3Gyr-old stars. We provide new constrains to the cosmic shoreline, the empirical division between rocky planets and planets with atmosphere, by using the evaporation detections and explore the capabilities of a new dimensionless parameter, $R_{\mathrm{He}}/R_{\mathrm{Hill}}$, to explain the He I triplet detections. Furthermore, we present a statistically significant upper boundary for the He I triplet detections in the $T_{\mathrm{eq}}$ vs ${\rho }_{\mathrm{p}}$ parameter space. Planets located above that boundary are unlikely to show He I absorption signals.

Accepted in A&A. 64 pages, many figures. Supplementary material in Zenodo

References in corpus (75)

• The Transiting Exoplanet Survey Satellite
• Molecfit: A general tool for telluric absorption correction. I. Method and application to ESO instruments
• Atmospheric Escape from Hot Jupiters
• Growth Model Interpretation of Planet Size Distribution
• A giant comet-like cloud of hydrogen escaping the warm Neptune-mass exoplanet GJ 436b
• Molecfit: A general tool for telluric absorption correction II. Quantitative evaluation on ESO-VLT X-Shooter spectra
• Spectrum radial velocity analyser (SERVAL). High-precision radial velocities and two alternative spectral indicators
• Spectrally resolved detection of sodium in the atmosphere of HD189733b with the HARPS spectrograph
• Density, not radius, separates rocky and water-rich small planets orbiting M dwarf stars
• Lyman-$\alpha$ Transit Spectroscopy and the Neutral Hydrogen Tail of the Hot Neptune GJ436b
• Four newborn planets transiting the young solar analog V1298 Tau
• Detection of sodium in the atmosphere of WASP-69b
• The hot dayside and asymmetric transit of WASP-189b seen by CHEOPS
• KELT-20b: A giant planet with a period of P~ 3.5 days transiting the V~ 7.6 early A star HD 185603
• TESS Hunt for Young and Maturing Exoplanets (THYME) III: a two-planet system in the 400 Myr Ursa Major Group
• Rossiter--McLaughlin models and their effect on estimates of stellar rotation, illustrated using six WASP systems
• Confirmation of WASP-107b's extended Helium atmosphere with Keck II/NIRSPEC
• Modelling the He I triplet absorption at 10830 Angstroms in the atmosphere of HD 209458 b
• Detection of Na, K, and H$\alpha$ absorption in the atmosphere of WASP-52b using ESPRESSO
• A He I upper atmosphere around the warm Neptune GJ 3470b
• The Upper Edge of the Neptune Desert Is Stable Against Photoevaporation
• The GAPS programme at TNG XXII. The GIARPS view of the extended helium atmosphere of HD189733 b accounting for stellar activity
• The atmosphere of HD 209458b seen with ESPRESSO. No detectable planetary absorptions at high resolution
• Limits on the Spin-Orbit Angle and Atmospheric Escape for the 22 Myr-old Planet AU Mic b
• Rapid contraction of giant planets orbiting the 20 million-years old star V1298 Tau
• Detection of Atmospheric Escape from Four Young Mini Neptunes
• TOI-1136 is a Young, Coplanar, Aligned Planetary System in a Pristine Resonant Chain
• Detection of Ongoing Mass Loss from HD 63433c, a Young Mini Neptune
• Irradiation-driven escape of primordial planetary atmospheres II. Evaporation efficiency of sub-Neptunes through hot Jupiters
• Non-detection of Helium in the Upper Atmospheres of Three Sub-Neptune Exoplanets
• Constraints on Metastable Helium in the Atmospheres of WASP-69b and WASP-52b with Ultra-Narrowband Photometry
• H$\alpha$ and He I absorption in HAT-P-32 b observed with CARMENES -- Detection of Roche lobe overflow and mass loss
• High-energy irradiation and mass loss rates of hot Jupiters in the solar neighborhood
• A tentative detection of He I in the atmosphere of GJ 1214b
• Current Population Statistics Do Not Favor Photoevaporation over Core-Powered Mass Loss as the Dominant Cause of the Exoplanet Radius Gap
• Transmission spectroscopy and Rossiter-McLaughlin measurements of the young Neptune orbiting AU Mic
• High-resolution transmission spectroscopy study of ultra-hot Jupiters HAT-P-57b, KELT-17b, KELT-21b, KELT-7b, MASCARA-1b, and WASP-189b
• The young HD 73583 (TOI-560) planetary system: Two 10-M${}_{\oplus }$ mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf
• Modelling the He I triplet absorption at 10830 Angstroms in the atmospheres of HD 189733 b and GJ 3470 b
• Active cool stars and He I 10830 Å: the coronal connection
• Constraints on the mass and atmospheric composition and evolution of the low-density young planet DS Tuc A b
• Keck/NIRSPEC studies of He I in the atmospheres of two inflated hot gas giants orbiting K dwarfs: WASP-52b and WASP-177b
• The GAPS Programme with HARPS-N at TNG. XXXVII. A precise density measurement of the young ultra-short period planet TOI-1807 b
• TOI-2076 and TOI-1807: Two young, comoving planetary systems within 50 pc identified by TESS that are ideal candidates for further follow-up
• Uncovering the true periods of the young sub-Neptunes orbiting TOI-2076
• Zodiacal Exoplanets in Time. X. The Orbit and Atmosphere of the Young "Neptune Desert"-Dwelling Planet K2-100b
• Mining the Ultra-Hot Skies of HAT-P-70b: Detection of a Profusion of Neutral and Ionized Species
• DREAM II. The spin-orbit angle distribution of close-in exoplanets under the lens of tides
• H-alpha and Ca II Infrared Triplet Variations During a Transit of the 23 Myr Planet V1298 Tau c
• Homogeneous search for helium in the atmosphere of 11 gas giant exoplanets with SPIRou
• The GAPS Programme at TNG. XXXII. The revealing non-detection of metastable HeI in the atmosphere of the hot Jupiter WASP-80b
• 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
• Evidence of energy-, recombination-, and photon-limited escape regimes in giant planet H/He atmospheres
• The MOPYS project: A survey of 70 planets in search of extended He I and H atmospheres. No evidence of enhanced evaporation in young planets
• GJ 436b and the stellar wind interaction: simulations constraints using Ly$\alpha$ and H$\alpha$ transits
• TESS Hunt for Young and Maturing Exoplanets (THYME) VII : Membership, rotation, and lithium in the young cluster Group-X and a new young exoplanet
• Zodiacal Exoplanets in Time. XI. The Orbit and Radiation Environment of the Young M Dwarf-Hosted Planet K2-25b
• Helium Enhanced Planets Along the Upper Edge of the Radius Valley
• The obliquity and atmosphere of the ultra-hot Jupiter TOI-1431b (MASCARA-5b): A misaligned orbit and no signs of atomic ormolecular absorptions
• DREAM: III.A helium survey in exoplanets on the edge of the hot Neptune desert with GIANO-B@TNG
• More Evidence for Variable Helium Absorption from HD 189733b
• Zodiacal Exoplanets in Time (ZEIT) XIII: Planet Orbits and Atmospheres in the V1298 Tau System, a Keystone in Studies of Early Planetary Evolution
• Confirmation of an He I evaporating atmosphere around the 650-Myr-old sub-Neptune HD235088 b (TOI-1430 b) with CARMENES
• The CARMENES search for exoplanets around M dwarfs. Telluric absorption corrected high S/N optical and near-infrared template spectra of 382 M dwarf stars
• Scaling K2 VII: Evidence for a high occurrence rate of hot sub-Neptunes at intermediate ages
• A search for H$\alpha$ absorption around KELT-3 b and GJ 436 b
• Planet(esimal)s Around Stars with TESS (PAST) III: A Search for Triplet He I in the Atmospheres of Two 200 Myr-old Planets
• TOI-2046b, TOI-1181b and TOI-1516b, three new hot Jupiters from \textit{TESS}: planets orbiting a young star, a subgiant and a normal star
• TOI-1268b: the youngest, hot, Saturn-mass transiting exoplanet
• The Variable Detection of Atmospheric Escape around the young, Hot Neptune AU Mic b
• A Mini-Neptune Orbiting the Metal-poor K Dwarf BD+29 2654
• Characterization of exoplanetary atmospheres with SLOPpy
• Absence of extended atmospheres in low-mass star radius-gap planets GJ 9827 b, GJ 9827 d and TOI-1235 b
• Dynamical masses of two young transiting sub-Neptunes orbiting HD 63433
• Evolution of helium triplet transits of close-in gas giants orbiting K-dwarfs

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