期刊
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN
卷 61, 期 5, 页码 1107-1115出版社
OXFORD UNIV PRESS
DOI: 10.1093/pasj/61.5.1107
关键词
Galaxy: globular clusters: individual (47 Tucanae); X-rays: ISM
资金
- Japan Society for the Promotion of Science
- Grant-in-Aid for Scientific Research [18104004]
- Grants-in-Aid for Scientific Research [18104004] Funding Source: KAKEN
Using the Suzaku X-ray Imaging Spectrometer, we performed a 130 ks observation of an extended X-ray emission, which was shown by ROSAT and Chandra observations to apparently associate with the globular cluster 47 Tucanae. The obtained 0.5-6 keV spectrum was successfully fitted with a redshifted thin thermal plasma emission model whose temperature and redshift are 2.2(-0.3)(+0.2) keV (at the rest frame) and 0.34 +/- 0.02, respectively. The derived parameters, including the temperature, redshift, and luminosity, indicate that the extended X-ray source is a background cluster of galaxies, and its projected location falls, by chance, on the direction of the proper motion of 47 Tucanae.
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