Study of asymmetric brightness distribution in distant clusters of galaxies

Akihiro Furuzawa, T. Tawara, K. Yamashita

Research output: Contribution to journalArticle

Abstract

We present results of the study on the spatial asymmetric distribution of the X-ray surface brightness and the plasma temperature in distant clusters of galaxies (z>0.1) with ASCA. Though most of distant clusters we analyzed (∼ 6 clusters) show spherical symmetric shape, we found the significant excess from the iso-thermal beta model in two clusters. The temperature in that region seems to be different from the average. Recently asymmetric patterns in the surface brightness distribution and the plasma temperature have been detected even in the clusters had known as the spherical symmetric shaped cluster. This non-spherical symmetric distribution has been also suggested by gravitational lensing image analyses and multi-components of a velocity dispersion. It may be caused by a cluster-cluster merging or in-falling groups.

Original languageEnglish
Pages (from-to)785-788
Number of pages4
JournalAdvances in Space Research
Volume25
Issue number3-4
DOIs
Publication statusPublished - 01-01-2000

Fingerprint

brightness distribution
Galaxies
Luminance
galaxies
Plasmas
plasma
temperature
Merging
Temperature
plasma temperature
X rays
distribution
falling
spatial distribution
brightness

All Science Journal Classification (ASJC) codes

  • Aerospace Engineering
  • Astronomy and Astrophysics
  • Geophysics
  • Atmospheric Science
  • Space and Planetary Science
  • Earth and Planetary Sciences(all)

Cite this

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abstract = "We present results of the study on the spatial asymmetric distribution of the X-ray surface brightness and the plasma temperature in distant clusters of galaxies (z>0.1) with ASCA. Though most of distant clusters we analyzed (∼ 6 clusters) show spherical symmetric shape, we found the significant excess from the iso-thermal beta model in two clusters. The temperature in that region seems to be different from the average. Recently asymmetric patterns in the surface brightness distribution and the plasma temperature have been detected even in the clusters had known as the spherical symmetric shaped cluster. This non-spherical symmetric distribution has been also suggested by gravitational lensing image analyses and multi-components of a velocity dispersion. It may be caused by a cluster-cluster merging or in-falling groups.",
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Study of asymmetric brightness distribution in distant clusters of galaxies. / Furuzawa, Akihiro; Tawara, T.; Yamashita, K.

In: Advances in Space Research, Vol. 25, No. 3-4, 01.01.2000, p. 785-788.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Study of asymmetric brightness distribution in distant clusters of galaxies

AU - Furuzawa, Akihiro

AU - Tawara, T.

AU - Yamashita, K.

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AB - We present results of the study on the spatial asymmetric distribution of the X-ray surface brightness and the plasma temperature in distant clusters of galaxies (z>0.1) with ASCA. Though most of distant clusters we analyzed (∼ 6 clusters) show spherical symmetric shape, we found the significant excess from the iso-thermal beta model in two clusters. The temperature in that region seems to be different from the average. Recently asymmetric patterns in the surface brightness distribution and the plasma temperature have been detected even in the clusters had known as the spherical symmetric shaped cluster. This non-spherical symmetric distribution has been also suggested by gravitational lensing image analyses and multi-components of a velocity dispersion. It may be caused by a cluster-cluster merging or in-falling groups.

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