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Substructures revealed by the Sunyaev-Zel'dovich effect at 150GHz in the high resolution map of RXJ1347-1145

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

We report on mapping observations toward the region of the most luminous X-ray cluster RXJ1347-1145 (z=0.45) through the Sunyaev-Zel'dovich effect at 21GHz and 150GHz with the Nobeyama 45-m telescope. While a low angular resolution image at 21GHz (beam-size of 76'') shows a consistent feature with the ROSAT/HRI X-ray image, a higher angular resolution image (13'') at 150GHz reveals complex morphological structures of the cluster region, which cannot be simply described by the spherical isothermal beta-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.

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Eiichiro Komatsu, Hiroshi Matsuo, Tetsu Kitayama, Makoto Hattori, Ryohei Kawabe, Kotaro Kohno, Nario Kuno, Yasushi Suto, Sabine Schindler, Kohji Yoshikawa. 2000-06-21. Substructures revealed by the Sunyaev-Zel'dovich effect at 150GHz in the high resolution map of RXJ1347-1145. https://doi.org/10.1093/pasj%2F53.1.57

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