X-ray and weak lensing measurements of the mass profile of MS1008.1–1224: Chandra and VLT data

Free access article

Issue		A&A Volume 398, Number 1, January IV 2003


Page(s)		L5 - L9
Section		Letters
DOI		http://dx.doi.org/10.1051/0004-6361:20021804

A&A 398, L5-L9 (2003)
DOI: 10.1051/0004-6361:20021804

Letter

X-ray and weak lensing measurements of the mass profile of MS1008.1-1224: Chandra and VLT data

S. Ettori¹ and M. Lombardi^{1, 2}

¹ European Southern Observatory, Karl-Schwarzschild-Straße 2, 85748 Garching bei München, Germany
² Institüt für Astrophysik und Extraterrestrische Forschung, Auf dem Hügel 71, 53121 Bonn, Germany

(Received 20 November 2002 / Accepted 5 December 2002)

Abstract
We analyse the Chandra dataset of the galaxy cluster MS1008.1-1224 to recover an estimate of the gravitating mass as function of the radius and compare these results with the weak lensing reconstruction of the mass distribution obtained from deep FORS1-VLT multicolor imaging. Even though the X-ray morphology is disturbed with a significant excess in the northern direction suggesting that the cluster is not in a relaxed state, we are able to match the two mass profiles both in absolute value and in shape within $1 \sigma$ uncertainty and up to 1100 h₅₀^-1 kpc. The recovered X-ray mass estimate does not change by using either the azimuthally averaged gas density and temperature profiles or the results obtained in the northern sector alone where the signal-to-noise ratio is higher.

Key words: galaxies: clusters: individual: MS1008.1-1224 -- X-ray: galaxies: clusters -- gravitational lensing -- cosmology: observations -- methods: statistical

Offprint request: S. Ettori, settori@eso.org

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