Alignment of galaxies and clusters

Yasuhiro Hashimoto, J. Patrick Henry, Hans Boehringer

研究成果: 雜誌貢獻文章

28 引文 斯高帕斯(Scopus)

摘要

We investigated the influence of environment on cluster galaxies by examining the alignment of the brightest cluster galaxy (BCG) position angle with respect to the host cluster X-ray position angle. The cluster position angles were measured using high spatial resolution X-ray data taken from the Chandra Advanced CCD Imaging Spectrometer archive that significantly improved the determination of the cluster shape as compared to the conventional method of using optical images. Meanwhile, those of the BCGs were measured using homogeneous data set composed of high spatial resolution optical images taken with Suprime-Cam mounted on Subaru 8-m telescope. We found a strong indication of an alignment between the cluster X-ray emission and optical light from BCGs, while we see no clear direct correlation between the degree of ellipticity of X-ray and optical BCG morphologies, despite the apparent alignment of two elliptical structures. We have also investigated possible dependence of the position angle alignment on the X-ray morphology of the clusters, and no clear trends are found. The fact that no trends are evident regarding frequency or degree of the alignment with respect to X-ray morphology may be consistent with an interpretation as a lack of dependence on the dynamical status of clusters.

原文英語
頁(從 - 到)1562-1568
頁數7
期刊Monthly Notices of the Royal Astronomical Society
390
發行號4
DOIs
出版狀態已發佈 - 2008 十一月 1

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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