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Gemini and Chandra Observations of Abell 586, A Relaxed Strong-lensing Cluster

Cypriano, E. S ; Lima Neto, G. B ; Sodré, Jr., L ; Kneib, J.-P ; Campusano, L. E

The Astrophysical journal, 2005-09, Vol.630 (1), p.38-49 [Periódico revisado por pares]

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Título:
Gemini and Chandra Observations of Abell 586, A Relaxed Strong-lensing Cluster
Autor: Cypriano, E. S ; Lima Neto, G. B ; Sodré, Jr., L ; Kneib, J.-P ; Campusano, L. E
Assuntos: Astrophysics ; Cosmology and Extra-Galactic Astrophysics ; Physics
É parte de: The Astrophysical journal, 2005-09, Vol.630 (1), p.38-49
Notas: ObjectType-Article-1
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Descrição: 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 super(-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 64 Gyr ago.
Editor: Chicago, IL: IOP Publishing
Idioma: Inglês

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