Journal ArticleDOI
Interstellar bubbles. II - Structure and evolution
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In this article, the detailed structure of the interaction of a strong stellar wind with the interstellar medium is presented, including the effects of thermal conduction between the hot interior and the cold shell of swept-up interstellar matter.Abstract:
The detailed structure of the interaction of a strong stellar wind with the interstellar medium is presented. First, an adiabatic similarity solution is given which is applicable at early times. Second, a similarity solution is derived which includes the effects of thermal conduction between the hot (about 1 million K) interior and the cold shell of swept-up interstellar matter. This solution is then modified to include the effects of radiative energy losses. The evolution of an interstellar bubble is calculated, including the radiative losses. The quantitative results for the outer-shell radius and velocity and the column density of highly ionized species such as O VI are within a factor 2 of the approximate results of Castor, McCray, and Weaver (1975). The effect of stellar motion on the structure of a bubble, the hydrodynamic stability of the outer shell, and the observable properties of the hot region and the outer shell are discussed.read more
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Journal ArticleDOI
The ultraluminous X-ray source bubble in NGC 5585
Roberto Soria,Roberto Soria,Manfred W. Pakull,Christian Motch,James Miller-Jones,Axel Schwope,R. Urquhart,Matthew Ryan +7 more
TL;DR: In this article, the authors used the Large Binocular Telescope to study the optical emission from the ionized bubble and derived an average shock velocity ≈125 km/s^−1, which corresponds to a dynamical age of ∼600 000yr for the bubble, and an average mechanical power P_w ∼ 10^40
Journal ArticleDOI
Thermal emission from bow shocks. I. 2D hydrodynamic models of the Bubble Nebula
TL;DR: In this article, a 2D hydrodynamic simulation was conducted to model the interaction of the central star's wind with the interstellar medium (ISM) and the results indicated that the O star creates a bow shock as it moves through the ISM and in turn creates an asymmetric bubble visible at optical and infrared wavelengths, and predicted to be visible in X-rays.
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The Astrosphere of the Asymptotic Giant Branch Star CIT 6
TL;DR: In this article, two extended half-ring structures were discovered in a far-ultraviolet image taken with the GALEX satellite of the well-known mass-losing carbon star CIT 6 (RW LMi).
Journal ArticleDOI
A Faraday Rotation Study of the Stellar Bubble and HII Region Associated with the W4 Complex
TL;DR: In this paper, the authors used the Very Large Array (VLA) to make multifrequency polarization measurements of 20 radio sources viewed through the IC 1805 HII region and "Superbubble", as well as in the immediate vicinity.
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AST/RO Observations of CO J=4-3 Emission from the N44 Complex in the Large Magellanic Cloud
TL;DR: In this paper, the authors detected strong 12CO J=4-3 emission toward the H II region called as N44BC, which is located on the rim of an expanding giant shell in the N44 region.