Suzaku X-Ray Follow-Up Observation of Weak-Lensing-Detected Halos in the Field around ZwCl 0823.2+0425

Research output: Contribution to journalArticle

Authors

  • E Watanabe
  • M Takizawa
  • K Nakazawa
  • N Okabe
  • M Kawaharada
  • A Babul
  • A Finoguenov
  • JE Taylor

Colleges, School and Institutes

Abstract

We present the results of a Suzaku X-ray follow-up observation of weak-lensing-detected halos in the field around galaxy cluster ZwCl 0823.2+0425. We clearly detected X-ray emission associated with most of these halos, and determined their detailed physical parameters, such as the X-ray luminosity, temperature, and metal abundance, for the first time. We found that the X-ray luminosity-temperature relation for these halos agrees with the former typical results. With the mass determined from the weak gravitational lensing data, the mass-temperature relation for them was also investigated, and was found to be consistent with the prediction from a simple self-similar model and the results of previous studies with both lensing and X-ray data. We would like to emphasize that the self-similar scaling relation of the mass and the temperature is shown here for the first time using a weak-lensing selected sample, whereas previous studies of the mass scaling relation used X-ray-selected samples of clusters. Therefore, our study demonstrates the importance of X-ray follow-up observations of shear-selected clusters, and shows that a joint X-ray and lensing analysis will be crucial for clusters discovered by the forthcoming weak-lensing surveys, such as the one planned with Subaru/Hyper-Suprime-Cam.

Details

Original languageEnglish
Pages (from-to)357-366
Number of pages10
JournalPublications of the Astronomical Society of Japan
Volume63
Issue number2
Publication statusPublished - 1 Jan 2011

Keywords

  • gravitational lensing, galaxies: clusters: individual (ZwCl 0823.2+0425), X-rays: galaxies: clusters