TY - JOUR
T1 - X-Ray temperature and mass measurements to the virial radius of abell 1413 with suzaku
AU - Hoshino, Akio
AU - Henry, J. Patrick
AU - Sato, Kosuke
AU - Akamatsu, Hiroki
AU - Yokota, Wataru
AU - Sasaki, Shin
AU - Ishisaki, Yoshitaka
AU - Ohashi, Takaya
AU - Bautz, Marshall
AU - Fukazawa, Yasushi
AU - Kawano, Naomi
AU - Furuzawa, Akihiro
AU - Hayashida, Kiyoshi
AU - Tawa, Noriaki
AU - Hughes, John P.
AU - Kokubun, Motohide
AU - Tamura, Takayuki
PY - 2010/4/25
Y1 - 2010/4/25
N2 - We present X-ray observations of the northern outskirts of the relaxed galaxy cluster A 1413 with Suzaku, whose XIS instrument has the low intrinsic background needed to make measurements of these low surface brightness regions. We excised 15 point sources superimposed on the image above a flux of 1x10 -14 erg cm-2s-1 (2-10 ke V) using XMM-Newton and Suzaku images of the cluster. We quantified all known systematic errors as part of our analysis, and showed that our statistical errors encompass them for the most part. Our results extend previous measurements with Chandra and XMM-Newton, and show a significant temperature drop to about 3 ke V at the virial radius, r200. Our entropy profile in the outer region (> 0.5 r200) joins smoothly onto that of XMM-Newton, and shows a flatter slope compared with simple models, similar to a few other clusters observed at the virial radius. The integrated mass of the cluster at the virial radius is approximately 7.5 x 1014 M⊙, and varies by about 30%, depending on the particular method used to measure it.
AB - We present X-ray observations of the northern outskirts of the relaxed galaxy cluster A 1413 with Suzaku, whose XIS instrument has the low intrinsic background needed to make measurements of these low surface brightness regions. We excised 15 point sources superimposed on the image above a flux of 1x10 -14 erg cm-2s-1 (2-10 ke V) using XMM-Newton and Suzaku images of the cluster. We quantified all known systematic errors as part of our analysis, and showed that our statistical errors encompass them for the most part. Our results extend previous measurements with Chandra and XMM-Newton, and show a significant temperature drop to about 3 ke V at the virial radius, r200. Our entropy profile in the outer region (> 0.5 r200) joins smoothly onto that of XMM-Newton, and shows a flatter slope compared with simple models, similar to a few other clusters observed at the virial radius. The integrated mass of the cluster at the virial radius is approximately 7.5 x 1014 M⊙, and varies by about 30%, depending on the particular method used to measure it.
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U2 - 10.1093/pasj/62.2.371
DO - 10.1093/pasj/62.2.371
M3 - Article
AN - SCOPUS:77953341895
SN - 0004-6264
VL - 62
SP - 371
EP - 389
JO - Publications of the Astronomical Society of Japan
JF - Publications of the Astronomical Society of Japan
IS - 2
ER -