Journal
ASTROPHYSICAL JOURNAL
Volume 719, Issue 2, Pages 1926-1931Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/719/2/1926
Keywords
cosmology: observations; galaxies: clusters: general; X-rays: galaxies: clusters
Categories
Funding
- JSPS (Japan Society for Promotion of Science)
- Japanese Ministry of Education, Culture, Sports, Science, and Technology [20.10466, 22.5467]
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We derive the axis ratio distribution of X-ray clusters using the XMM-Newton catalog. By fitting the contour lines of the X-ray image by ellipses, we confirm that the X-ray distribution is well approximated by the elliptic distribution with a constant axis ratio and direction. We construct a simple model describing the axis ratio of the X-ray gas assuming the hydrostatic equilibrium embedded in the triaxial dark matter halo model proposed by Jing & Suto and the hydrostatic equilibrium. We find that the observed probability density function of the axis ratio is consistent with this model prediction.
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