Journal ArticleDOI
Interstellar bubbles. II - Structure and evolution
Reads0
Chats0
TLDR
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
Citations
More filters
Journal ArticleDOI
How to model supernovae in simulations of star and galaxy formation
Philip F. Hopkins,Andrewy Wetzel,Andrewy Wetzel,Andrewy Wetzel,Dušan Kereš,Claude André Faucher-Giguère,Eliot Quataert,Michael Boylan-Kolchin,Norman Murray,Christopher C. Hayward,Kareem El-Badry +10 more
TL;DR: In this article, the authors present the FIRE-2 algorithm for coupling mechanical feedback, which can be applied to any hydrodynamics method (e.g., fixed-grid, moving-mesh, and mesh-less methods), and black hole as well as stellar feedback.
Journal ArticleDOI
Cold dust in late-type Virgo cluster galaxies
TL;DR: In this paper, the spatially integrated far-infrared (FIR) emissions of the complete volume and luminosity-limited sample of late-type (later than S0) Virgo Cluster galaxies measured using the Infrared Space Observatory by Tuffs and coworkers in bands centered on 60, 100, and 170 μm.
Journal ArticleDOI
Massive stars and the energy balance of the interstellar medium. II. The 35 solar mass star and a solution to the "missing wind problem"
Abstract: We continue our numerical analysis of the morphological and energetic influence of massive stars on their ambient interstellar medium for a 35 solar mass star that evolves from the main sequence through red supergiant and Wolf-Rayet phases, until it ultimately explodes as a supernova. We find that structure formation in the circumstellar gas during the early main-sequence evolution occurs as in the 60 solar mass case but is much less pronounced because of the lower mechanical wind luminosity of the star. Since on the other hand the shell-like structure of the HII region is largely preserved, effects that rely on this symmetry become more important. At the end of the stellar lifetime 1% of the energy released as Lyman continuum radiation and stellar wind has been transferred to the circumstellar gas. From this fraction 10% is kinetic energy of bulk motion, 36% is thermal energy, and the remaining 54% is ionization energy of hydrogen. The sweeping up of the slow red supergiant wind by the fast Wolf-Rayet wind produces remarkable morphological structures and emission signatures, which are compared with existing observations of the Wolf-Rayet bubble S308. Our model reproduces the correct order of magnitude of observed X-ray luminosity, the temperature of the emitting plasma as well as the limb brightening of the intensity profile. This is remarkable, because current analytical and numerical models of Wolf-Rayet bubbles fail to consistently explain these features. A key result is that almost the entire X-ray emission in this stage comes from the shell of red supergiant wind swept up by the shocked Wolf-Rayet wind rather than from the shocked Wolf-Rayet wind itself as hitherto assumed and modeled. This offers a possible solution to what is called the ``missing wind problem'' of Wolf-Rayet bubbles.
Journal ArticleDOI
HST/STIS optical spectroscopy of five super star clusters in the starburst galaxy M82
Linda J. Smith,M. S. Westmoquette,John S. Gallagher,Robert W. O'Connell,D. J. Rosario,R. de Grijs +5 more
TL;DR: In this paper, optical spectroscopy obtained with the Space Telescope Imaging Spectrograph of five young massive star clusters in the starburst galaxy M82 was performed for one cluster 'M82-A1' and its immediate environment in the core.
Journal ArticleDOI
Superbubble dynamics in globular cluster infancy - II. Consequences for secondary star formation in the context of self-enrichment via fast-rotating massive stars
Martin Krause,Corinne Charbonnel,Corinne Charbonnel,Thibaut Decressin,Georges Meynet,Nikos Prantzos +5 more
TL;DR: In this paper, the authors studied the interaction of fast-rotating massive stars (FRMS) with the intra-cluster medium (ICM) and developed a timeline of the first ≈40 Myr of GC evolution.