The Influence of Coronal Mass Ejections on the Mass-loss Rates of Hot-Jupiters
arXiv:1709.01027 · doi:10.3847/1538-4357/aa82b2
Abstract
Hot-Jupiters are subject to extreme radiation and plasma flows coming from their host stars. Past ultraviolet Hubble Space Telescope observations, supported by hydrodynamic models, confirmed that these factors lead to the formation of an extended envelope, part of which lies beyond the Roche lobe. We use gas-dynamic simulations to study the impact of time variations in the parameters of the stellar wind, namely that of coronal mass ejections (CMEs), on the envelope of the typical hot-Jupiter HD 209458b. We consider three CMEs characterized by different velocities and densities, taking their parameters from typical CMEs observed for the Sun. The perturbations in the ram-pressure of the stellar wind during the passage of each CME tear off most of the envelope that is located beyond the Roche lobe. This leads to a substantial increase of the mass-loss rates during the interaction with the CME. We find that the mass lost by the planet during the whole crossing of a CME is of g, regardless of the CME taken into consideration. We also find that over the course of 1 Gyr, the mass lost by the planet because of CME impacts is comparable to that lost because of high-energy stellar irradiation.
arXiv comment12 pages, 6 figures
References in corpus (27)
- Defining and cataloging exoplanets: The exoplanet.eu database
- Detection of oxygen and carbon in the hydrodynamically escaping atmosphere of the extrasolar planet HD209458b
- A giant comet-like cloud of hydrogen escaping the warm Neptune-mass exoplanet GJ 436b
- The Role of Core Mass in Controlling Evaporation: the Kepler Radius Distribution and the Kepler-36 Density Dichotomy
- Roche lobe effects on the atmospheric loss of "Hot Jupiters"
- Metals in the Exosphere of the Highly Irradiated Planet WASP-12b
- Observations of Mass Loss from the Transiting Exoplanet HD 209458b
- Temporal variations in the evaporating atmosphere of the exoplanet HD 189733b
- Comprehensive Analysis of Coronal Mass Ejection Mass and Energy Properties Over a Full Solar Cycle
- The escape of heavy atoms from the ionosphere of HD209458b. I. A photochemical-dynamical model of the thermosphere
- How Many CMEs Have Flux Ropes? Deciphering the Signatures of Shocks, Flux Ropes, and Prominences in Coronagraph Observations of CMEs
- Near-UV Absorption, Chromospheric Activity, and Star-Planet Interactions in the WASP-12 system
- 3D model of hydrogen atmospheric escape from HD209458b and HD189733b: radiative blow-out and stellar wind interactions
- Early UV Ingress in WASP-12b: Measuring Planetary Magnetic Fields
- Quantitative Measurements of CME-driven Shocks from LASCO Observations
- Connecting speeds, directions and arrival times of 22 coronal mass ejections from the Sun to 1 AU
- Magnetic moment and plasma environment of HD 209458b as determined from Ly observations
- Exoplanet HD209458b: inflated hydrogen atmosphere but no sign of evaporation
- On the existence of energetic atoms in the upper atmosphere of exoplanet HD209458b
- 3D Gas Dynamic Simulation of the Interaction Between the Exoplanet WASP-12b and Its Host Star
- The escape of heavy atoms from the ionosphere of HD209458b. II. Interpretation of the observations
- Linking remote imagery of a coronal mass ejection to its in situ signatures at 1 AU
- Types of Gaseous Envelopes of "Hot Jupiter" Exoplanets
- Mass-Loss Rates of "Hot-Jupiter" Exoplanets with Various Types of Gaseous Envelopes
- Propagation of the 2012 March Coronal Mass Ejections from the Sun to Heliopause
- Using ForeCAT Deflections and Rotations to Constrain the Early Evolution of CMEs
- The Influence of Coronal Mass Ejections on the Gas Dynamics of the Atmosphere of a "Hot~Jupiter" Exoplanet
Cited by in corpus (25)
- Suppression of Coronal Mass Ejections in active stars by an overlying large-scale magnetic field: A numerical study
- The Stellar CME-flare relation: What do historic observations reveal?
- The evolution of the solar wind
- Stellar wind effects on the atmospheres of close-in giants: a possible reduction in escape instead of increased erosion
- The impact of coronal mass ejections and flares on the atmosphere of the hot Jupiter HD189733b
- A census of Coronal Mass Ejections on solar-like stars
- Tuning the Exo-Space Weather Radio for Stellar Coronal Mass Ejections
- Effects of Radiation Pressure on the Evaporative Wind of HD 209458b
- On possible types of magnetospheres of hot Jupiters
- Detection of Flare-associated CME Candidates on Two M-dwarfs by GWAC and Fast, Time-resolved Spectroscopic Follow-ups
- Atmospheric mass loss from hot Jupiters irradiated by stellar superflares
- Stellar Winds Drive Strong Variations in Exoplanet Evaporative Outflows and Transit Absorption Signatures
- The space weather around the exoplanet GJ 436 b. II. Stellar wind-exoplanet interactions
- The influence of stellar flare on dynamical state of the atmosphere of exoplanet HD 209458b
- Red Asymmetry of H Line Profiles during the flares on the active RS CVn-type star II Pegasi
- Flaring-associated Complex Dynamics in Two M-dwarfs Revealed by Fast, Time-resolved Spectroscopy
- Impact of M-dwarf Stellar Wind and Photoevaporation on the Atmospheric Evolution of Small Planets
- Star-Planet Interactions: A Computational View
- Forward Modeling of Magnetic-field Measurements at the Bases of Stellar Coronae through Extreme-Ultraviolet Spectroscopy
- A huge-amplitude white-light superflare on a L0 brown dwarf discovered by GWAC survey
- Flaring Latitudes in Ensembles of Low Mass Stars
- Doppler-shifted Signatures in the Chromospheric Line Profiles of II Pegasi
- Investigating Possible Stellar Coronal Mass Ejections in M-type Dwarfs Using the CARMENES DR1 Spectra
- A Possible Stellar CME Event Associated with a Long-duration Optical Flare on the RS CVn-type Star UX Arietis
- Coronal Mass Ejections and Exoplanets: A Numerical Perspective