Giant planet engulfment by evolved giant stars: light curves, asteroseismology, and survivability

Abstract

About ten percent of Sun-like ($1$-$2M_{\odot }$) stars will engulf a $1$-$10M_{\mathrm{J}}$ planet as they expand during the red giant branch (RGB) or asymptotic giant branch (AGB) phase of their evolution. Once engulfed, these planets experience a strong drag force in the star's convective envelope and spiral inward, depositing energy and angular momentum. For these mass ratios, the inspiral takes $\sim 10$-$10^2$ years ($\sim 10^2$-$10^3$ orbits); the planet undergoes tidal disruption at a radius of $\sim R_{\odot }$. We use the Modules for Experiments in Stellar Astrophysics (MESA) software instrument to track the stellar response to the energy deposition while simultaneously evolving the planetary orbit. For RGB stars, as well as AGB stars with $M_{\mathrm{p}}\lesssim 5M_{\mathrm{J}}$ planets, the star responds quasistatically but still brightens measurably on a timescale of years. In addition, asteroseismic indicators, such as the frequency spacing or rotational splitting, differ before and after engulfment. For AGB stars, engulfment of a $M_{\mathrm{p}}\gtrsim 5M_{\mathrm{J}}$ planet drives supersonic expansion of the envelope, causing a bright, red, dusty eruption similar to a "luminous red nova." Based on the peak luminosity, color, duration, and expected rate of these events, we suggest that engulfment events on the AGB could be a significant fraction of low-luminosity red novae in the Galaxy. We do not find conditions where the envelope is ejected prior to the planet's tidal disruption, complicating the interpretation of short-period giant planets orbiting white dwarfs as survivors of common-envelope evolution.

arXiv comment24 pages, 11 figures, 1 table. Accepted to ApJ

References in corpus (132)

• SciPy 1.0--Fundamental Algorithms for Scientific Computing in Python
• Array Programming with NumPy
• The chemical composition of the Sun
• Modules for Experiments in Stellar Astrophysics (MESA)
• Modules for Experiments in Stellar Astrophysics (MESA): Giant Planets, Oscillations, Rotation, and Massive Stars
• Modules for Experiments in Stellar Astrophysics (MESA): Binaries, Pulsations, and Explosions
• Modules for Experiments in Stellar Astrophysics (MESA): Convective Boundaries, Element Diffusion, and Massive Star Explosions
• Modules for Experiments in Stellar Astrophysics (MESA): Pulsating Variable Stars, Rotation, Convective Boundaries, and Energy Conservation
• Low Temperature Opacities
• The false positive rate of Kepler and the occurrence of planets
• Common Envelope Evolution: Where we stand and how we can move forward
• Dynamical Outcomes of Planet-Planet Scattering
• The Keck Planet Search: Detectability and the Minimum Mass and Orbital Period Distribution of Extrasolar Planets
• Prevalence of Earth-size planets orbiting Sun-like stars
• Giant Planet Occurrence in the Stellar Mass-Metallicity Plane
• Shell-model calculations of stellar weak interaction rates: II. Weak rates for nuclei in the mass range A=45-65 in supernovae environment
• Modules for Experiments in Stellar Astrophysics (MESA): Time-Dependent Convection, Energy Conservation, Automatic Differentiation, and Infrastructure
• Dynamical Friction in a Gaseous Medium
• Formation of Hot Planets by a combination of planet scattering, tidal circularization, and Kozai mechanism
• Updated Electron-Conduction Opacities: The Impact on Low-Mass Stellar Models
• Giant Planets at Small Orbital Distances
• Tidal Evolution of Close-in Extra-Solar Planets
• The Orbital Evolution of Gas Giant Planets around Giant Stars
• On the Formation of Hot Jupiters in Stellar Binaries
• Hints for a Turnover at the Snow Line in the Giant Planet Occurrence Rate
• The accretion of planets and brown dwarfs by giant stars -- II. solar mass stars on the red giant branch
• About 30% of Sun-like Stars Have Kepler-like Planetary Systems: A Study of their Intrinsic Architecture
• Thermodynamic functions of dense plasmas: analytic approximations for astrophysical applications
• Precise Radial Velocities of Giant Stars VII. Occurrence Rate of Giant Extrasolar Planets as a Function of Mass and Metallicity
• Foretellings of Ragnarök: World-engulfing Asymptotic Giants and the Inheritance of White Dwarfs
• Asteroseismology of 16000 Kepler Red Giants: Global Oscillation Parameters, Masses, and Radii
• Low-Mass Binary Induced Outflows from Asymptotic Giant Branch Stars
• Pre-Supernova Outbursts via Wave Heating in Massive Stars I: Red Supergiants
• Can Planets survive Stellar Evolution?
• Can Planets Influence the Horizontal Branch Morphology?
• Steady-state planet migration by the Kozai-Lidov mechanism in stellar binaries
• A Giant Planet Candidate Transiting a White Dwarf
• Coulomb tunneling for fusion reactions in dense matter: Path integral Monte Carlo versus mean field
• Statistics of Long Period Gas Giant Planets in Known Planetary Systems
• Formation and Stellar Spin-Orbit Misalignment of Hot Jupiters from Lidov-Kozai Oscillations in Stellar Binaries
• Survival of a brown dwarf after engulfment by a red giant star
• Falling Transiting Extrasolar Giant Planets
• The Accretion of Brown Dwarfs and Planets by Giant Stars -- I. AGB Stars
• Eruptions of the V838 Mon type: stellar merger versus nuclear outburst models
• Stellar Mergers Are Common
• Skye: A Differentiable Equation of State
• Retired A Stars Revisited: An Updated Giant Planet Occurrence Rate as a Function of Stellar Metallicity and Mass
• Observable Signatures of Planet Accretion in Red Giant Stars I: Rapid Rotation and Light Element Replenishment
• Optical and X-ray Transients from Planet-Star Mergers
• The stability and fates of hierarchical two-planet systems
• Hot Jupiters are Destroyed by Tides While Their Host Stars are on the Main Sequence
• Common Envelope Wind Tunnel: Coefficients of Drag and Accretion in a Simplified Context for Studying Flows Around Objects Embedded Within Stellar Envelopes
• The formation of high-field magnetic white dwarfs from common envelopes
• Hydrodynamic Simulations of the Interaction between Giant Stars and Planets
• OGLE-2002-BLG-360: from a gravitational microlensing candidate to an overlooked red transient
• On Lithium-Rich Red Giants. I. Engulfment of Sub-Stellar Companions
• Thermal Structure and Radius Evolution of Irradiated Gas Giant Planets
• Accounting for Incompleteness due to Transit Multiplicity in Kepler Planet Occurrence Rates
• Kronos & Krios: Evidence for accretion of a massive, rocky planetary system in a comoving pair of solar-type stars
• A model of an expanding giant that swallowed planets for the eruption of V838 Monocerotis
• Episodic mass ejections from common-envelope objects
• A Jovian analogue orbiting a white dwarf star
• New Conductive Opacities for White Dwarf Envelopes
• The Role of Planet Accretion in Creating the Next Generation of Red Giant Rapid Rotators
• First versus second generation planet formation in post common envelope binary (PCEB) planetary systems
• Efficient common-envelope ejection through dust-driven winds
• Star-planet interactions: II. Is planet engulfment the origin of fast rotating red giants?
• Four new planets around giant stars and the mass-metallicity correlation of planet-hosting stars
• From Hot Jupiters to Super-Earths via Roche Lobe Overflow
• Luminous Red Novae: population models and future prospects
• The limited role of recombination energy in common envelope removal
• A-type Stars, the Destroyers of Worlds: The lives and deaths of Jupiters in evolving stellar binaries
• A Giant Planet Around a Metal-poor Star of Extragalactic Origin
• Magnetic Field, Dust, and Axisymmetrical Mass Loss on the AGB
• On the use of hydrogen recombination energy during common envelope events
• In-Situ Scattering of Warm Jupiters and Implications for Dynamical Histories
• Chemical evidence for planetary ingestion in a quarter of Sun-like stars
• WD 1856 b: a close giant planet around a white dwarf that could have survived a common-envelope phase
• Close detached white dwarf + brown dwarf binaries: further evidence for low values of the common envelope efficiency
• Mergerburst Transients of Brown Dwarfs with Exoplanets
• Energy transport by convection in the common envelope evolution
• A Catalogue of Potential Post Common Envelope Binaries
• Pre-Common-Envelope Mass Loss from Coalescing Binary Systems
• Connecting planets around horizontal branch stars with known exoplanets
• Tidal Decay and Stable Roche-Lobe Overflow of Short-Period Gaseous Exoplanets
• The Role of Convection in Determining the Ejection Efficiency of Common Envelope Interactions
• Population synthesis of Galactic subdwarf B stars
• Enhanced Lidov-Kozai migration and the formation of the transiting giant planet WD1856+534b
• Discovery of a close substellar companion to the hot subdwarf star HD 149382 - The decisive influence of substellar objects on late stellar evolution
• Nonlinear Dynamical Friction in a Gaseous Medium
• Eating Planets for Lunch and Dinner: Signatures of Planet Consumption by Evolving Stars
• Planetary Engulfment in the Hertzsprung--Russell Diagram
• Kozai Migration Naturally Explains the White Dwarf Planet WD1856b
• No evidence of the planet orbiting the extremely metal-poor extragalactic star HIP13044
• Possible Implications of the Planet Orbiting the Red Horizontal Branch Star HIP 13044
• A physical model of mass ejection in failed supernovae
• The Effects of Planets and Brown Dwarfs on Stellar Rotation and Mass-Loss
• Secular Dimming of KIC 8462852 Following its Consumption of a Planet
• A Flared, Orbiting, Dusty Disk Around HD 233517
• Simulation of a Compact Object with Outflows Moving Through a Gaseous Background
• How Jupiters save or destroy inner Neptunes around evolved stars
• A detailed view of the gas shell around R Sculptoris with ALMA
• Planet Engulfment Detections are Rare According to Observations and Stellar Modeling
• Volumetric rates of Luminous Red Novae and Intermediate Luminosity Red Transients with the Zwicky Transient Facility
• Dynamical friction for supersonic motion in a homogeneous gaseous medium
• Partial Stellar Explosions -- Ejected Mass and Minimal Energy
• Convection and Spin-Up During Common Envelope Evolution: The Formation of Short-Period Double White Dwarfs
• Planet Engulfment Signatures in Twin Stars
• Shock Dynamics in Stellar Outbursts: I. Shock formation
• Long-Term Lithium Abundance Signatures following Planetary Engulfment
• Signature of Planetary Mergers on Stellar Spins
• Gas and Dust Associated with the Strange, Isolated, Star BP Piscium
• Successive common envelope events from multiple planets
• Runaway Coalescence of Pre-Common-Envelope Stellar Binaries
• A Substantial Dust Disk Surrounding an Actively Accreting First-Ascent Giant Star
• Instability of mass transfer in a planet-star system
• A red giant branch common envelope evolution scenario for the exoplanet WD 1856 b
• Disruption of a planet spiralling into its host star
• Rings and filaments: The remarkable detached CO shell of U Antliae
• 3D Hydrodynamics of Pre-supernova Outbursts in Convective Red Supergiant Envelopes
• Tidal Evolution of Eccentric Binaries Driven by Convective Turbulent Viscosity
• An intermediate-luminosity-optical-transient (ILOT) model for the young stellar object ASASSN-15qi
• Wave-Driven Shocks in Stellar Outbursts: Dynamics, Envelope Heating, and Nascent Blastwaves
• Gemini/GMOS Transmission Spectroscopy of the Grazing Planet Candidate WD 1856+534 b
• ALMA observations of the "fresh" carbon-rich AGB star TX Piscium. The discovery of an elliptical detached shell
• Dusty shells surrounding the carbon variables S Scuti and RT Capricorni
• The future influence of six exoplanets on the envelope properties of their parent stars on the giant branches
• VLT observations of the asymmetric Etched Hourglass Nebula, MyCn 18
• Sub-stellar engulfment by a main sequence star: where is the lithium?
• Non-Detection of the Putative Substellar Companion to HD 149382
• Rapid expansion of red giant stars during core helium flash by waves propagation to the envelope and implications to exoplanets
• The Planets-Capture Model of V838 Monocerotis

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• Aerosols and hydrocarbons in the atmosphere of a white dwarf planet
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• Second-generation planet formation after tidal disruption from common envelope evolution
• Mass Ejection Driven by Sudden Energy Deposition in Stellar Envelopes
• The Tale of a Hungry Subgiant and Its Brown Dwarf: Interior Radiative Damping Dominates the Tidal Evolution of TOI-5882
• VVV-WIT-13: an eruptive young star with cool molecular features
• Atmospheric Signatures of Common Envelope Evolution in White Dwarf Planets
• Evolution of the ZTF SLRN-2020 star-planet merger