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Title:
Substructures Revealed by the Sunyaev-Zel'dovich Effect at 150 GHz in a High-Resolution Map of RX J1347-1145
Authors:
Komatsu, Eiichiro; Matsuo, Hiroshi; Kitayama, Tetsu; Hattori, Makoto; Kawabe, Ryohei; Kohno, Kotaro; Kuno, Nario; Schindler, Sabine; Suto, Yasushi; Yoshikawa, Kohji
Affiliation:
AA(Princeton University, Tohoku University, AL), AB(National Astronomical Observatory), AC(Department of Physics, Tokyo Metropolitan University, AL), AD(Astronomical Institute, Tohoku University, AL), AE(Nobeyama Radio Observatory), AF(Nobeyama Radio Observatory), AG(Nobeyama Radio Observatory), AH(Astrophysical Research Institute, Liverpool John Moores University, AL), AI(Department of Physics, The University of Tokyo), AJ(Department of Astronomy, Kyoto University, AL)
Publication:
Publications of the Astronomical Society of Japan, vol.53, no. 1, p. 57-62. (PASJ Homepage)
Publication Date:
02/2001
Origin:
PASJ
Keywords:
COSMIC MICROWAVE BACKGROUND, COSMOLOGY: OBSERVATIONS, DISTANCE SCALE, GALAXIES: CLUSTERS: INDIVIDUAL (RX J1347-1145), X-RAYS: GALAXIES
Bibliographic Code:
2001PASJ...53...57K

Abstract

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 sigma FWHM of 76'' ) shows a consistent feature with the ROSAT/HRI X-ray image, a higher angular resolution image (sigma FWHM =13'') at 150 GHz 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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