The Kaleidoscope survey: strong gravitational lensing in galaxy clusters with radial arcs
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| Titel: | The Kaleidoscope survey: strong gravitational lensing in galaxy clusters with radial arcs |
|---|---|
| Autoren: | Catherine Cerny, Mathilde Jauzac, David Lagattuta, Anna Niemiec, Guillaume Mahler, Alastair Edge, Richard Massey, Joseph Allingham |
| Weitere Verfasser: | HEP, INSPIRE |
| Quelle: | Monthly Notices of the Royal Astronomical Society. 541:2341-2365 |
| Publication Status: | Preprint |
| Verlagsinformationen: | Oxford University Press (OUP), 2025. |
| Publikationsjahr: | 2025 |
| Schlagwörter: | Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics of Galaxies, Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, [PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph], Cosmology and Nongalactic Astrophysics |
| Beschreibung: | We measure the dark matter density profiles of six galaxy clusters: A383, MS 2137–23, MACS J0326.8−0043, MACS J1427.6–2521, MACS J0417.5−1154, and MACS J0949.8+1708. Each cluster contains at least one radial arc, a unique physical feature that allows for more precise measurements of the inner mass profile ($R < 50$ kpc) from strong lensing. We present the first strong lensing analysis for MACS J0326 and MACS J1427. We use a combination of Hubble Space Telescope imaging and Multi-Unit Spectroscopic Explorer (MUSE) spectroscopy from the ESO Kaleidoscope Clusters Survey, a large ‘filler’ program, to identify and measure redshifts for multiply imaged systems and obtain the 2D stellar velocity dispersion for each centrally located brightest cluster galaxy (BCG). The BCG kinematics are used to subtract the baryonic mass component from the inner mass profile. We find total mass density profiles consistent with previous works using a combination of strong lensing and BCG kinematics. The overall shape of these profiles appears core-like, with an average dark matter slope measurement of $\gamma \sim 0.66$. These results demonstrate the ongoing need for the construction of observational models for galaxy clusters, and show how galaxy-scale kinematics can be used to disentangle baryonic and dark matter concentrations in cluster cores. |
| Publikationsart: | Article |
| Sprache: | English |
| ISSN: | 1365-2966 0035-8711 |
| DOI: | 10.1093/mnras/staf1076 |
| DOI: | 10.48550/arxiv.2506.21531 |
| Zugangs-URL: | http://arxiv.org/abs/2506.21531 https://hal.science/hal-05153535v1 https://doi.org/10.1093/mnras/staf1076 |
| Rights: | CC BY |
| Dokumentencode: | edsair.doi.dedup.....cf1b4498a759b88710ceb3c0f2506421 |
| Datenbank: | OpenAIRE |
Nájsť tento článok vo Web of Science | Abstract: | We measure the dark matter density profiles of six galaxy clusters: A383, MS 2137–23, MACS J0326.8−0043, MACS J1427.6–2521, MACS J0417.5−1154, and MACS J0949.8+1708. Each cluster contains at least one radial arc, a unique physical feature that allows for more precise measurements of the inner mass profile ($R < 50$ kpc) from strong lensing. We present the first strong lensing analysis for MACS J0326 and MACS J1427. We use a combination of Hubble Space Telescope imaging and Multi-Unit Spectroscopic Explorer (MUSE) spectroscopy from the ESO Kaleidoscope Clusters Survey, a large ‘filler’ program, to identify and measure redshifts for multiply imaged systems and obtain the 2D stellar velocity dispersion for each centrally located brightest cluster galaxy (BCG). The BCG kinematics are used to subtract the baryonic mass component from the inner mass profile. We find total mass density profiles consistent with previous works using a combination of strong lensing and BCG kinematics. The overall shape of these profiles appears core-like, with an average dark matter slope measurement of $\gamma \sim 0.66$. These results demonstrate the ongoing need for the construction of observational models for galaxy clusters, and show how galaxy-scale kinematics can be used to disentangle baryonic and dark matter concentrations in cluster cores. |
|---|---|
| ISSN: | 13652966 00358711 |
| DOI: | 10.1093/mnras/staf1076 |