منابع مشابه
Wind-Blown Bubbles around Evolved Stars
Most stars will experience episodes of substantial mass loss at some point in their lives. For very massive stars, mass loss dominates their evolution, although the mass loss rates are not known exactly, particularly once the star has left the main sequence. Direct observations of the stellar winds of massive stars can give information on the current mass-loss rates, while studies of the ring n...
متن کاملPossible wind blown bubbles associated with five Of stars
Four fields of ∼ 5◦ × 4◦ have been surveyed using the Hi-21 cm line (hpbw = 0. ◦5) in searching for Hi interstellar bubbles in the environs of several Of stars. The analysis of the data disclosed four bubble candidates, three with almost complete envelopes. Their dimensions are ∼ 40 pc and their expansion velocities around 10 km s−1. For each structure sweptup masses (1000 to 8800 M ), original...
متن کاملTurbulence in Wind-Blown Bubbles around Massive Stars
Winds from massive stars (> 8 solar masses) result in the formation of wind-blown “bubbles” around these stars. In this paper we study, via two-dimensional numerical hydrodynamic simulations, the onset and growth of turbulence during the formation and evolution of these wind-blown “bubbles”. Our simulations reveal the formation of vortex rolls during the Main-Sequence stage of the evolution, an...
متن کاملSelf-similar evolution of wind-blown bubbles with mass loading by hydrodynamic ablation
We present similarity solutions for adiabatic bubbles that are blown by winds having time independent mechanical luminosities and that are each mass-loaded by the hydrodynamic ablation of distributed clumps. The mass loading is ‘switched-on’ at a specified radius (with free-expansion of the wind interior to this point) and injects mass at a rate per unit volume proportional to Mr where δ = 4/3 ...
متن کاملSelf-Similar Evolution of Wind-Blown Bubbles with Mass-loading by Conductive Evaporation
We present similarity solutions for adiabatic bubbles that are blown by winds having time dependent mechanical luminosities and that are each mass-loaded at a rate per unit volume proportional to T r, where T is the temperature, r is the distance from the bubble center, and λ is a constant. In the limit of little mass loading a similarity solution found by Dyson (1973) for expansion into a smoo...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2010
ISSN: 0004-637X,1538-4357
DOI: 10.1088/0004-637x/713/1/592