|
| | | | |
| | | |
| Stat |
Members: 3645
Articles: 2'504'928
Articles rated: 2609
25 April 2024 |
|
| | | | |
|
Article overview
| |
|
|
StarBench: The D-type expansion of an HII region | | T.G. Bisbas
; T.J. Haworth
; R.J.R. Williams
; J. Mackey
; P. Tremblin
; A.C. Raga
; S.J. Arthur
; C. Baczynski
; J.E. Dale
; T. Frostholm
; S. Geen
; T. Haugboelle
; D. Hubber
; I.T. Iliev
; R. Kuiper
; J. Rosdahl
; D. Sullivan
; S. Walch
; R. Wuensch
; | | Date: |
20 Jul 2015 | | Abstract: | StarBench is a project focused on benchmarking and validating different
star-formation and stellar feedback codes. In this first StarBench paper we
perform a comparison study of the D-type expansion of an HII region. The aim of
this work is to understand the differences observed between the twelve
participating numerical codes against the various analytical expressions
examining the D-type phase of HII region expansion. To do this, we propose two
well-defined tests which are tackled by 1D and 3D grid- and SPH- based codes.
The first test examines the ’early phase’ D-type scenario during which the
mechanical pressure driving the expansion is significantly larger than the
thermal pressure of the neutral medium. The second test examines the ’late
phase’ D-type scenario during which the system relaxes to pressure equilibrium
with the external medium. Although they are mutually in excellent agreement,
all twelve participating codes follow a modified expansion law that deviates
significantly from the classical Spitzer solution in both scenarios. We present
a semi-empirical formula combining the two different solutions appropriate to
both early and late phases that agrees with high-resolution simulations to
$lesssim2\%$. This formula provides a much better benchmark solution for code
validation than the Spitzer solution. The present comparison has validated the
participating codes and through this project we provide a dataset for
calibrating the treatment of ionizing radiation hydrodynamics codes. | | Source: | arXiv, 1507.5621 | | Services: | Forum | Review | PDF | Favorites | |
|
|
No review found.
Did you like this article?
Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.
browser Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
|
| |
|
|
|
|
News, job offers and information for researchers and scientists:
| |
REGISTER