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Title: Numerical Simulations of Supernova Remnant Evolution in a Cloudy Interstellar Medium

Abstract

The mixed morphology class of supernova remnants has centrally peaked X-ray emission along with a shell-like morphology in radio emission. White and Long proposed that these remnants are evolving in a cloudy medium wherein the clouds are evaporated via thermal conduction once being overrun by the expanding shock. Their analytical model made detailed predictions regarding temperature, density, and emission profiles as well as shock evolution. We present numerical hydrodynamical models in 2D and 3D including thermal conduction, testing the White and Long model and presenting results for the evolution and emission from remnants evolving in a cloudy medium. We find that, while certain general results of the White and Long model hold, such as the way the remnants expand and the flattening of the X-ray surface brightness distribution, in detail there are substantial differences. In particular we find that the X-ray luminosity is dominated by emission from shocked cloud gas early on, leading to a bright peak, which then declines and flattens as evaporation becomes more important. In addition, the effects of thermal conduction on the intercloud gas, which is not included in the White and Long model, are important and lead to further flattening of the X-ray brightness profilemore » as well as lower X-ray emission temperatures.« less

Authors:
; ; ; ; ;  [1];  [2]
  1. Harvard-Smithsonian Center for Astrophysics, 60 Garden Street, Cambridge, MA 02138 (United States)
  2. NASA Goddard Space Flight Center, Code 662, Greenbelt, MD 20771 (United States)
Publication Date:
OSTI Identifier:
22663160
Resource Type:
Journal Article
Journal Name:
Astrophysical Journal
Additional Journal Information:
Journal Volume: 846; Journal Issue: 1; Other Information: Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0004-637X
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; BRIGHTNESS; COMPUTERIZED SIMULATION; COSMIC X-RAY BURSTS; DENSITY; DISTRIBUTION; EMISSION; EVAPORATION; FORECASTING; HYDRODYNAMICS; LUMINOSITY; STAR EVOLUTION; SUPERNOVA REMNANTS; SURFACES; THERMAL CONDUCTION

Citation Formats

Slavin, Jonathan D., Smith, Randall K., Foster, Adam, Winter, Henry D., Raymond, John C., Slane, Patrick O., and Yamaguchi, Hiroya, E-mail: jslavin@cfa.harvard.edu. Numerical Simulations of Supernova Remnant Evolution in a Cloudy Interstellar Medium. United States: N. p., 2017. Web. doi:10.3847/1538-4357/AA8552.
Slavin, Jonathan D., Smith, Randall K., Foster, Adam, Winter, Henry D., Raymond, John C., Slane, Patrick O., & Yamaguchi, Hiroya, E-mail: jslavin@cfa.harvard.edu. Numerical Simulations of Supernova Remnant Evolution in a Cloudy Interstellar Medium. United States. doi:10.3847/1538-4357/AA8552.
Slavin, Jonathan D., Smith, Randall K., Foster, Adam, Winter, Henry D., Raymond, John C., Slane, Patrick O., and Yamaguchi, Hiroya, E-mail: jslavin@cfa.harvard.edu. Fri . "Numerical Simulations of Supernova Remnant Evolution in a Cloudy Interstellar Medium". United States. doi:10.3847/1538-4357/AA8552.
@article{osti_22663160,
title = {Numerical Simulations of Supernova Remnant Evolution in a Cloudy Interstellar Medium},
author = {Slavin, Jonathan D. and Smith, Randall K. and Foster, Adam and Winter, Henry D. and Raymond, John C. and Slane, Patrick O. and Yamaguchi, Hiroya, E-mail: jslavin@cfa.harvard.edu},
abstractNote = {The mixed morphology class of supernova remnants has centrally peaked X-ray emission along with a shell-like morphology in radio emission. White and Long proposed that these remnants are evolving in a cloudy medium wherein the clouds are evaporated via thermal conduction once being overrun by the expanding shock. Their analytical model made detailed predictions regarding temperature, density, and emission profiles as well as shock evolution. We present numerical hydrodynamical models in 2D and 3D including thermal conduction, testing the White and Long model and presenting results for the evolution and emission from remnants evolving in a cloudy medium. We find that, while certain general results of the White and Long model hold, such as the way the remnants expand and the flattening of the X-ray surface brightness distribution, in detail there are substantial differences. In particular we find that the X-ray luminosity is dominated by emission from shocked cloud gas early on, leading to a bright peak, which then declines and flattens as evaporation becomes more important. In addition, the effects of thermal conduction on the intercloud gas, which is not included in the White and Long model, are important and lead to further flattening of the X-ray brightness profile as well as lower X-ray emission temperatures.},
doi = {10.3847/1538-4357/AA8552},
journal = {Astrophysical Journal},
issn = {0004-637X},
number = 1,
volume = 846,
place = {United States},
year = {2017},
month = {9}
}