Common envelope light-curves - I. grid-code module calibration

Abstract

The common envelope binary interaction occurs when a star transfers mass onto a companion that cannot fully accrete it. The interaction can lead to a merger of the two objects or to a close binary. The common envelope interaction is the gateway of all evolved compact binaries, all stellar mergers and likely many of the stellar transients witnessed to date. Common envelope simulations are needed to understand this interaction and to interpret stars and binaries thought to be the byproduct of this stage. At this time, simulations are unable to reproduce the few observational data available and several ideas have been put forward to address their shortcomings. The need for more definitive simulation validation is pressing, and is already being fulfilled by observations from time-domain surveys. In this article, we present an initial method and its implementation for post-processing grid-based common envelope simulations to produce the light-curve so as to compare simulations with upcoming observations. Here we implemented a zeroth order method to calculate the light emitted from common envelope hydrodynamic simulations carried out with the 3D hydrodynamic code Enzo used in uni-grid mode. The code implements an approach for the computation of luminosity in both optically thick and optically thin regimes and is tested using the first 135 days of the common envelope simulation of Passy et al. (2012), where a 0.8 solar masses red giant branch star interacts with a 0.6 solar masses companion. This code is used to highlight two large obstacles that need to be overcome before realistic light curves can be calculated. We explain the nature of these problems and the attempted solutions and approximations in full detail to enable the next step to be identified and implemented. We also discuss our simulation in relation to recent data of transients identified as common envelope interactions.

arXiv commentAccepted by The Astrophysical Journal Supplement. 22 pages, 16 figures, 1 appendix

References in corpus (44)

• Stellar Multiplicity
• A Multi-Code Analysis Toolkit for Astrophysical Simulation Data
• Common Envelope Evolution: Where we stand and how we can move forward
• Double Compact Objects I: The Significance Of The Common Envelope On Merger Rates
• V1309 Scorpii: merger of a contact binary
• Double Compact Objects III: Gravitational Wave Detection Rates
• Tidal Decay of Close Planetary Orbits
• The RAGE radiation-hydrodynamic code
• Post-common-envelope binaries from SDSS. IX: Constraining the common-envelope efficiency
• An AMR Study of the Common Envelope Phase of Binary Evolution
• An energetic stellar outburst accompanied by circumstellar light echoes
• Simulating the Common Envelope Phase of a Red Giant Using SPH and Uniform Grid Codes
• On the alpha formalism for the common envelope interaction
• The age, life expectancy, and space density of Post Common Envelope Binaries
• Double Core Evolution X. Through the Envelope Ejection Phase
• The impact of companions on stellar evolution
• An unusually brilliant transient in the galaxy Messier 85
• Identification of the Long-Sought Common-Envelope Events
• Hydrodynamic moving-mesh simulations of the common envelope phase in binary stellar systems
• Cool and Luminous Transients from Mass-Losing Binary Stars
• V1309 SCO - Understanding a merger
• Nova Sagittarii 1994 #1 (V4332 Sagittarii): The Discovery and Evolution of an Unusual Luminous Red Variable Star
• Binary Stellar Mergers with Marginally-Bound Ejecta: Excretion Disks, Inflated Envelopes, Outflows, and their Luminous Transients
• Failed Supernovae Explain the Compact Remnant Mass Function
• Common Envelope ejection for a Luminous Red Nova in M101
• The effect of a wider initial separation on common envelope binary interaction simulations
• Recombination energy in double white dwarf formation
• Lessons from the Onset of a Common Envelope Episode: the Remarkable M31 2015 Luminous Red Nova Outburst
• Massive-Star Mergers and the Recent Transient in NGC4490: A More Massive Cousin of V838 Mon and V1309 Sco
• Common envelope events with low-mass giants: understanding the transition to the slow spiral-in
• On the role of recombination in common-envelope ejections
• Common envelope events with low-mass giants: understanding the energy budget
• The UBV(RI)c colors of the Sun
• Dynamical Opacity-Sampling Models of Mira Variables. II: Time-Dependent Atmospheric Structure and Observable Properties of 4 M-Type Model Series
• Magnetic Field Amplification During the Common Envelope Phase
• Hydrodynamic Simulations of the Interaction between an AGB Star and a Main Sequence Companion in Eccentric Orbits
• Dynamical Opacity-Sampling Models of Mira Variables. I: Modelling Description and Analysis of Approximations
• Population Synthesis Studies of Close Binary Systems Using a Variable Common Envelope Efficiency Parameter: I. Dependence upon Secondary Mass
• Considerations on the Role of Fall-Back Discs in the Final Stages of the Common Envelope Binary Interaction
• The Dusty Aftermath of the V1309 Sco Binary Merger
• Powering the Second 2012 Outburst of SN 2009ip by Repeating Binary Interaction
• V838 Monocerotis: the central star and its environment a decade after outburst
• Population Synthesis of Common Envelope Mergers: I. Giant Stars with Stellar or Substellar Companions
• An adaptive particle-mesh gravity solver for ENZO

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• Runaway Coalescence at the Onset of Common Envelope Episodes
• Efficient common-envelope ejection through dust-driven winds
• The limited role of recombination energy in common envelope removal
• Energy transport by convection in the common envelope evolution
• Pre-Common-Envelope Mass Loss from Coalescing Binary Systems
• The effect of binding energy and resolution in simulations of the common envelope binary interaction
• Simulating a binary system that experiences the grazing envelope evolution
• Radiating the hydrogen recombination energy during common envelope evolution
• Properties of the post in-spiral common envelope ejecta I: dynamical and thermal evolution
• Octo-Tiger: A New, 3D Hydrodynamic Code for Stellar Mergers that uses HPX Parallelisation
• Energizing the last phase of common envelope removal
• Observational Constraints on the Common Envelope Phase
• The formation of `columns crowns' by jets interacting with a circumstellar dense shell
• Grazing envelope evolution toward Type IIb supernovae
• Dust Formation in Common Envelope Binary Interaction -- I: 3D Simulations Using the Bowen Approximation
• Common envelopes in massive stars III. The obstructive role of radiation transport in envelope ejection
• Simulating a stellar contact binary merger -- I. Stellar models
• Parasite common envelope evolution by triple-star systems
• Surveying Planetary Nebulae Central Stars for Close Binaries: Constraining Evolution of Central Stars Based on Binary Parameters
• The depletion of the red supergiant envelope radiative zone during common envelope evolution