The Bullet cluster at its best: weighing stars, gas, and dark matter

D. Paraficz (1) , J.P. Kneib , J. Richard (2) , A. Morandi , M. Limousin (1) , E. Jullo (1) , J. Martinez

1 LAM - Laboratoire d'Astrophysique de Marseille
2 CRAL - Centre de Recherche Astrophysique de Lyon

Aims. We present a new strong lensing mass reconstruction of the Bullet cluster (1E 0657-56) at z = 0.296, based on WFC3 and ACS HST imaging and VLT/FORS2 spectroscopy. The strong lensing constraints underwent substantial revision compared to previously published analysis, there are now 14 (six new and eight previously known) multiply-imaged systems, of which three have spectroscopically confirmed redshifts (including one newly measured from this work).

Mots clés: gravitational lensing: strong; galaxies: clusters: individual: Bullet cluster

Domaines: Astrophysique [astro-ph]

D. Paraficz, J.P. Kneib, J. Richard, A. Morandi, M. Limousin, et al.. The Bullet cluster at its best: weighing stars, gas, and dark matter. Astronomy and Astrophysics - A&A, 2016, 594, pp.A121. ⟨10.1051/0004-6361/201527959⟩. ⟨hal-01555031⟩