Models of the circumstellar medium of evolving, massive runaway stars moving through the Galactic plane

Abstract

At least 5 per cent of the massive stars are moving supersonically through the interstellar medium (ISM) and are expected to produce a stellar wind bow shock. We explore how the mass loss and space velocity of massive runaway stars affect the morphology of their bow shocks. We run two-dimensional axisymmetric hydrodynamical simulations following the evolution of the circumstellar medium of these stars in the Galactic plane from the main sequence to the red supergiant phase. We find that thermal conduction is an important process governing the shape, size and structure of the bow shocks around hot stars, and that they have an optical luminosity mainly produced by forbidden lines, e.g. [OIII]. The Ha emission of the bow shocks around hot stars originates from near their contact discontinuity. The H$\alpha$ emission of bow shocks around cool stars originates from their forward shock, and is too faint to be observed for the bow shocks that we simulate. The emission of optically-thin radiation mainly comes from the shocked ISM material. All bow shock models are brighter in the infrared, i.e. the infrared is the most appropriate waveband to search for bow shocks. Our study suggests that the infrared emission comes from near the contact discontinuity for bow shocks of hot stars and from the inner region of shocked wind for bow shocks around cool stars. We predict that, in the Galactic plane, the brightest, i.e. the most easily detectable bow shocks are produced by high-mass stars moving with small space velocities.

arXiv comment22 pages, 24 figures

References in corpus (52)

• The chemical composition of the Sun
• Mass-loss predictions for O and B stars as a function of metallicity
• PLUTO: a Numerical Code for Computational Astrophysics
• The Neutral Atomic Phases of the ISM in the Galaxy
• Presupernova Evolution of Rotating Massive Stars I: Numerical Method and Evolution of the Internal Stellar Structure
• The effect of photo-ionization on the cooling rates of enriched, astrophysical plasmas
• Rotating Massive Main-Sequence Stars I: Grids of Evolutionary Models and Isochrones
• Evolution of rapidly rotating metal-poor massive stars towards gamma-ray bursts
• The PLUTO Code for Adaptive Mesh Computations in Astrophysical Fluid Dynamics
• NLTE line formation of Fe in late-type stars II: 1D spectroscopic stellar parameters
• The Aao/Ukst Supercosmos H-alpha Survey (SHS)
• Nonlinear Instabilities in Shock-Bounded Slabs
• Runaway stars as progenitors of supernovae and gamma-ray bursts
• High-order conservative reconstruction schemes for finite volume methods in cylindrical and spherical coordinates
• The imprint of a symbiotic binary progenitor on the properties of Kepler's supernova remnant
• The interaction of planetary nebulae and their AGB progenitors with the interstellar medium
• The importance of magnetic-field-oriented thermal conduction in the interaction of SNR shocks with interstellar clouds
• E-BOSS: an Extensive stellar BOw Shock Survey. I: Methods and First Catalogue
• Search for OB stars running away from young star clusters. I. NGC 6611
• Radiation-magnetohydrodynamic simulations of the photoionisation of magnetised globules
• The enigmatic nature of the circumstellar envelope and bow shock surrounding Betelgeuse as revealed by Herschel. I. Evidence of clumps, multiple arcs, and a linear bar-like structure
• Giant Outbursts of Luminous Blue Variables and the Formation of the Homunculus Nebula Around eta Carinae
• Computing the dust distribution in the bowshock of a fast moving, evolved star
• The circumstellar environment of Wolf-Rayet stars & Gamma-ray burst afterglows
• Discovery of a bow shock around Vela X-1
• Multiple ring nebulae around blue supergiants
• Detection of nonthermal emission from the bow shock of a massive runaway star
• Forming a constant density medium close to long gamma-ray bursts
• 3D Simulations of Betelgeuse's Bow Shock
• The Cepheid mass discrepancy and pulsation-driven mass loss
• Simulations of High-Velocity Clouds. I. Hydrodynamics and High-Velocity High Ions
• Search for OB stars running away from young star clusters. II. The NGC 6357 star-forming region
• The evolution of interstellar clouds in a streaming hot plasma including heat conduction
• On the absence of wind bow-shocks around OB-runaway stars: probing the physical conditions of the interstellar medium
• Simulating radiative astrophysical flows with the PLUTO code: A non-equilibrium, multi-species cooling function
• Infrared Emission and the Destruction of Dust in HII regions
• Vortices in the wakes of AGB stars
• Double bow shocks around young, runaway red supergiants: application to Betelgeuse
• IRC-10414: a bow-shock-producing red supergiant star
• Massive runaway stars in the Large Magellanic Cloud
• The hydrodynamics of the supernova remnant Cas A: The influence of the progenitor evolution on the velocity structure and clumping
• Discovery of a detached HI gas shell surrounding alpha Orionis
• The circumstellar medium around a rapidly rotating, chemically homogeneously evolving, possible gamma-ray burst progenitor
• The Interaction of Asymptotic Giant Branch Stars with the Interstellar Medium
• An Axisymmetric, Radiative Bow Shock Model with a Realistic Treatment of Ionization and Cooling
• AE Aurigae: first detection of non-thermal X-ray emission from a bow shock produced by a runaway star
• Can the magnetic field in the Orion arm inhibit the growth of instabilities in the bow shock of Betelgeuse?
• X Her and TX Psc: Two cases of ISM interaction with stellar winds observed by Herschel
• Dynamics of H II regions around exiled O stars
• Testing Mass Loss in Large Magellanic Cloud Cepheids using Infrared and Optical Observations II. Predictions and Tests of the OGLE-III Fundamental-Mode Cepheids
• Late Stages of Stellar Evolution - Herschel's contributions
• On the stability of bow shocks generated by red supergiants: the case of IRC-10414

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• A comprehensive search for stellar bowshock nebulae in the Milky Way: a catalog of 709 mid-infrared selected candidates
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• And then they were two: detection of non-thermal radio emission from the bow shocks of two runaway stars
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• Polarization simulations of stellar wind bow shock nebulae. I. The case of electron scattering
• Core-collapse supernova inside the core of a young massive star cluster: 3D MHD simulations
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• CPD-64 2731: a massive spun-up and rejuvenated high-velocity runaway star
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• Radio polarization from runaway star bowshocks-I. The general case
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