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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A hydrodynamical model of the circumstellar bubble created by two massive stars
TL;DR: In this article, a 2D model of the wind-blown bubble created by two massive stars, a 40 solar mass star and a 25 solar mass, was developed and the authors used the MPI-AMRVAC hydrodynamics code to solve the conservation equations of hydroynamics on a cylindrical grid using timedependent models for the wind parameters of the two stars.
Journal ArticleDOI
A new catalog of HI supershell candidates in the outer part of the Galaxy
TL;DR: In this article, a new neutral hydrogen HI supershell candidates catalog is presented to analyze their spatial distribution in the Galaxy and to carry out a statistical study of their main properties, which is based on the Leiden-Argentine-Bonn (LAB) survey.
Journal ArticleDOI
Chandra ACIS Survey of M33 (ChASeM33): The Enigmatic X-Ray Emission from IC131
R. Tullmann,Knox S. Long,Thomas G. Pannuti,P. Frank Winkler,Paul P. Plucinsky,Terrance J. Gaetz,Ben Williams,Kip D. Kuntz,Kip D. Kuntz,Wolfgang Pietsch,William P. Blair,Frank Haberl,Randall K. Smith +12 more
TL;DR: In this paper, the authors presented the first X-ray analysis of the diffuse hot ionized gas and the point sources in IC131, after NGC604 the second most Xray luminous giant H II region (GHR) in M33.
Journal ArticleDOI
On the morphology of supernova remnants with pulsars
TL;DR: In this paper, the authors present results of model calculations of the evolution of surface brightness and morphology of supernova remnants containing pulsars, and discuss how the morphology of a supernova remnant will depend on the velocity of expansion, the density of the ambient medium into which it is expanding, and the initial period and magnetic field strength of the central pulsar.
Journal ArticleDOI
Neutral hydrogen in M 108 (NGC 3556) and the discovery of HI supershells
D. King,J.A. Irwin +1 more
TL;DR: In this article, the first high-resolution HI maps of the nearby, edge-on galaxy N 108 (NGC 3556) were presented, where two HI loops, positioned at either end of the optical major axis, were interpreted as expanding supershells.