Gemini and Chandra observations of Abell 586, a relaxed strong-lensing cluster
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2005-09-01Metadata
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Cypriano, Eduardo S.
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Gemini and Chandra observations of Abell 586, a relaxed strong-lensing cluster
Abstract
We analyze the mass content of the massive strong- lensing cluster Abell 586 ( z 0: 17). We use optical data ( imaging and spectroscopy) obtained with the Gemini Multi- Object Spectrograph ( GMOS) mounted on the 8 m Gemini North telescope, together with publicly available X- ray data taken with the Chandra space telescope. Employing different techniques - velocity distribution of galaxies, weak gravitational lensing, and spatially resolved X- ray spectroscopy - we derive mass and velocity dispersion estimates from each of them. All estimates agree well with each other, within a 68% confidence level, indicating a velocity dispersion of 1000 - 1250 km s (-1). The projected mass distributions obtained through weak lensing and X- ray emission are strikingly similar, having nearly circular geometry. We suggest that Abell 586 is probably a truly relaxed cluster whose last major merger occurred more than similar to 4 Gyr ago.
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Artículo de publicación ISI
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URI: https://repositorio.uchile.cl/handle/2250/125748
DOI: DOI: 10.1086/430661
ISSN: 0004-637X
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ASTROPHYSICAL JOURNAL Volume: 630 Issue: 1 Pages: 38-49 Part: Part 1 Published: SEP 1 2005
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