Substructures revealed by the Sunyaev-Zel'dovich effect at 150 GHz in a high-resolution map of RX J1347-1145

Eiichiro Komatsu, Hiroshi Matsuo, Tetsu Kitayama, Makoto Hattori, Ryohei Kawabe, Kotaro Kohno, Nario Kuno, Sabine Schindler, Yasushi Suto, Kohji Yoshikawa

Research output: Contribution to journalArticlepeer-review

76 Citations (Scopus)


We report on mapping observations toward the region of the most luminous X-ray cluster, RX J1347-1145 (z = 0.45), through the Sunyaev-Zel'dovich effect at 21 GHz and 150 GHz with the Nobeyama 45-m telescope. While a low angular resolution image at 21 GHz (beam-size σFWHM of 76″) shows a consistent feature with the ROSAT/HRI X-ray image, a higher angular resolution image (σFWHM = 13″) at 150 GHz reveals complex morphological structures of the cluster region, which cannot be simply described by the spherical isothermal β-model. If such inhomogeneous morphological features prove to be generic for high-redshift clusters, distance measurements to the clusters based on their Sunyaev-Zel'dovich data with low angular resolution imaging should be interpreted with caution.

Original languageEnglish
Pages (from-to)57-62
Number of pages6
JournalPublications of the Astronomical Society of Japan
Issue number1
Publication statusPublished - 2001


  • Cosmic microwave background
  • Cosmology: observations
  • Distance scale
  • Galaxies: clusters: individual (RX J1347-1145)
  • X-rays: galaxies

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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