Universität zu Köln

Bisbas, T. G., Haworth, T. J., Williams, R. J. R., Mackey, J., Tremblin, P., Raga, A. C., Arthur, S. J., Baczynski, C., Dale, J. E., Frostholm, T., Geen, S., Haugbolle, T., Hubber, D., Iliev, I. T., Kuiper, R., Rosdahl, J., Sullivan, D., Walch, S. and Wuensch, R. (2015). STARBENCH: the D-type expansion of an H II region. Mon. Not. Roy. Astron. Soc., 453 (2). S. 1324 - 1344. OXFORD: OXFORD UNIV PRESS. ISSN 1365-2966

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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 H II region. The aim of this work is to understand the differences observed between the 12 participating numerical codes against the various analytical expressions examining the D-type phase of H II region expansion. To do this, we propose two well-defined tests which are tackled by 1D and 3D grid-and smoothed particle hydrodynamics-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 12 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 less than or similar to 2 per cent. 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 data set for calibrating the treatment of ionizing radiation hydrodynamics codes.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Bisbas, T. G. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haworth, T. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Williams, R. J. R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Mackey, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Tremblin, P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Raga, A. C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Arthur, S. J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Baczynski, C. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dale, J. E. UNSPECIFIED UNSPECIFIED UNSPECIFIED Frostholm, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Geen, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Haugbolle, T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hubber, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Iliev, I. T. UNSPECIFIED UNSPECIFIED UNSPECIFIED Kuiper, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED Rosdahl, J. UNSPECIFIED UNSPECIFIED UNSPECIFIED Sullivan, D. UNSPECIFIED UNSPECIFIED UNSPECIFIED Walch, S. UNSPECIFIED UNSPECIFIED UNSPECIFIED Wuensch, R. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-389516
DOI:	10.1093/mnras/stv1659
Journal or Publication Title:	Mon. Not. Roy. Astron. Soc.
Volume:	453
Number:	2
Page Range:	S. 1324 - 1344
Date:	2015
Publisher:	OXFORD UNIV PRESS
Place of Publication:	OXFORD
ISSN:	1365-2966
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TRIGGERED STAR-FORMATION; ADAPTIVE MESH REFINEMENT; SMOOTHED PARTICLE HYDRODYNAMICS; COSMOLOGICAL RADIATIVE-TRANSFER; TURBULENT MOLECULAR CLOUDS; INTERSTELLAR GAS LAYERS; MASSIVE STARS; IONIZING-RADIATION; PROTOSTELLAR DISKS; DRIVEN IMPLOSION Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/38951