TY - JOUR
T1 - Substructures revealed by the Sunyaev-Zel'dovich effect at 150 GHz in a high-resolution map of RX J1347-1145
AU - Komatsu, Eiichiro
AU - Matsuo, Hiroshi
AU - Kitayama, Tetsu
AU - Hattori, Makoto
AU - Kawabe, Ryohei
AU - Kohno, Kotaro
AU - Kuno, Nario
AU - Schindler, Sabine
AU - Suto, Yasushi
AU - Yoshikawa, Kohji
PY - 2001
Y1 - 2001
N2 - 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.
AB - 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.
KW - Cosmic microwave background
KW - Cosmology: observations
KW - Distance scale
KW - Galaxies: clusters: individual (RX J1347-1145)
KW - X-rays: galaxies
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U2 - 10.1093/pasj/53.1.57
DO - 10.1093/pasj/53.1.57
M3 - Article
AN - SCOPUS:0035609810
SN - 0004-6264
VL - 53
SP - 57
EP - 62
JO - Publications of the Astronomical Society of Japan
JF - Publications of the Astronomical Society of Japan
IS - 1
ER -