Joint HST, VLT/MUSE and XMM-Newton observations to constrain the mass distribution of the two strong lensing galaxy clusters: MACS J0242.5-2132 & MACS J0949.8+1708

Abstract

We present the strong lensing analysis of two galaxy clusters: MACS J0242.5-2132 (MACS J0242, $z=0.313$) and MACS J0949.8+1708 (MACS J0949, $z=0.383$). Their total matter distributions are constrained thanks to the powerful combination of observations with the Hubble Space Telescope and the MUSE instrument. Using these observations, we precisely measure the redshift of six multiple image systems in MACS J0242, and two in MACS J0949. We also include four multiple image systems in the latter cluster identified in HST imaging without MUSE redshift measurements. For each cluster, our best-fit mass model consists of a single cluster-scale halo, and 57 (170) galaxy-scale halos for MACS J0242 (MACS J0949). Multiple images positions are predicted with a $rms$ 0.39 arcsec and 0.15 arcsec for MACS J0242 and MACS J0949 models respectively. From these mass models, we derive aperture masses of $M(R<$200 kpc$)=1.67_{-0.05}^{+0.03}\times 10^{14}{M}_{\odot }$, and $M(R<$200 kpc$)=2.00_{-0.20}^{+0.05}\times 10^{14}{M}_{\odot }$. Combining our analysis with X-ray observations from the XMM-Newton Observatory, we show that MACS J0242 appears to be a relatively relaxed cluster, while conversely, MACS J0949 shows a relaxing post-merger state. At 200 kpc, X-ray observations suggest the hot gas fraction to be respectively $f_g=0.115_{-0.004}^{+0.003}$ and $0.053_{-0.006}^{+0.007}$ for MACS J0242 and MACS J0949. MACS J0242 being relaxed, its density profile is very well fitted by a NFW distribution, in agreement with X-ray observations. Finally, the strong lensing analysis of MACS J0949 suggests a flat dark matter density distribution in the core, between 10 and 100 kpc. This appears consistent with X-ray observations.

20 pages, 11 figures, published in MNRAS

References in corpus (25)

• HI4PI: A full-sky HI survey based on EBHIS and GASS
• A Bayesian approach to strong lensing modelling of galaxy clusters
• The non-gravitational interactions of dark matter in colliding galaxy clusters
• Stellar and total baryon mass fractions in groups and clusters since redshift 1
• Revealing the properties of dark matter in the merging cluster MACSJ0025.4-1222
• CLASH: Weak-Lensing Shear-and-Magnification Analysis of 20 Galaxy Clusters
• Cluster Lenses
• Mass and magnification maps for the Hubble Space Telescope Frontier Fields clusters: implications for high redshift studies
• The behaviour of dark matter associated with 4 bright cluster galaxies in the 10kpc core of Abell 3827
• The Causes of Halo Shape Changes Induced by Cooling Baryons: Disks Versus Substructures
• CLASH-VLT: Insights on the mass substructures in the Frontier Fields Cluster MACS J0416.1-2403 through accurate strong lens modeling
• An Atlas of MUSE Observations towards Twelve Massive Lensing Clusters
• The systematics of strong lens modeling quantified: the effects of constraint selection and redshift information on magnification, mass, and multiple image predictability
• Cosmic particle colliders: simulations of self-interacting dark matter with anisotropic scattering
• Hubble Frontier Fields: The Geometry and Dynamics of the Massive Galaxy Cluster Merger MACSJ0416.1-2403
• Mass distribution in the core of MACS J1206: robust modeling from an exceptionally large sample of central multiple images
• Three-dimensional Multi-probe Analysis of the Galaxy Cluster A1689
• Free Form Lensing Implications for the Collision of Dark Matter and Gas in the Frontier Fields Cluster MACSJ0416.1-2403
• Probing 3D Structure with a Large MUSE Mosaic: Extending the Mass Model of Frontier Field Abell 370
• The gravitational field of X-COP galaxy clusters
• CLUMP-3D. Three dimensional lensing and multi-probe analysis of MACS J1206.2-0847, a remarkably regular cluster
• MPDAF - A Python package for the analysis of VLT/MUSE data
• The Strongest Cluster Lenses: An Analysis of the Relation Between Strong Gravitational Lensing Strength and the Physical Properties of Galaxy Clusters
• A finer view of the conditional galaxy luminosity function and magnitude-gap statistics
• Triaxiality in galaxy clusters: Mass versus Potential reconstructions

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• A full reconstruction of two galaxy clusters intra-cluster medium with strong gravitational lensing
• The Kaleidoscope Survey: Strong Gravitational Lensing in Galaxy Clusters with Radial Arcs
• VENUS: Strong-lensing model of MACS J1931.8-2635 -- revealing the farthest multiply imaged supernova