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A new radiative cooling curve based on an up-to-date plasma emission code

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Abstract

This work presents a new plasma cooling curve that is calculated using the SPEX package. We compare our cooling rates to those in previous works, and implement the new cooling function in the grid-adaptive framework "AMRVAC". Contributions to the cooling rate by the individual elements are given, to allow for the creation of cooling curves tailored to specific abundance requirements. In some situations, it is important to be able to include radiative losses in the hydrodynamics. The enhanced compression ratio can trigger instabilities (such as the Vishniac thin-shell instability) that would otherwise be absent. For gas with temperatures below 104 K, the cooling time becomes very long and does not affect the gas on the timescales that are generally of interest for hydrodynamical simulations of circumstellar plasmas. However, above this temperature, a significant fraction of the elements is ionised, and the cooling rate increases by a factor 1000 relative to lower temperature plasmas.

Year of Publication
2009
Journal
Astronomy & Astrophysics
Volume
508
Number
2
Number of Pages
751-U240
Date Published
Dec
Type of Article
Article
ISBN Number
0004-6361
Accession Number
ISI:000273296700020
URL
PId
ec70223ba6752da95791144ed1271901
Alternate Journal
Astron. Astrophys.
Journal Article
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