| PROPOSAL OVERVIEW | |
| Proposal Title | Galaxy clusters in the Zone of Avoidance and cosmic (an)isotropy |
| Proposal Category | Galaxies, Groups of Galaxies, Clusters of Galaxies and Superclusters |
| Proposal Type | LARGE PROGRAM |
| Proposal Id | 096068 |
| Number of Observations | 27 |
| Total exposure time (ks) | 497 |
| PI DETAILS | |
| PI | Dr. Konstantinos Migkas |
| Institute | Leiden Observatory |
| Country | NETHERLANDS |
| CO-INVESTIGATORS | ||
| Name | Country | |
| G. Schellenberger | UNITED STATES | |
| A. Simionescu | NETHERLANDS | |
| T. Reiprich | GERMANY | |
| H. Rottgering | NETHERLANDS | |
| F. Pacaud | GERMANY | |
| ABSTRACT | |
| Recent observational evidence for cosmic anisotropies at >200 Mpc scales put LCDM under pressure. If the observed anisotropy is robustly confirmed, it will have deep implications for concordance cosmology. Our previous work on galaxy cluster scaling relations revealed a 9%% Hubble constant dipole in the local Universe, at a 5.4 sigma level. However, the dipole points toward the Zone of Avoidance, where very little deep X-ray cluster data are available. Thus, the origin of the observed dipole remains uncertain. We propose the observation of 27 galaxy clusters in the Zone of Avoidance with a total exposure time of 389 ks. These clusters lie at key sky positions and will provide conclusive answers to a fundamental cosmological question: is the local Universe in tension with LCDM? | |
| PAPERS |
| - CLASS 1: | papers that present specific XMM-Newton observations |
| - CLASS 2: | papers that refer to published XMM-Newton results with complementary observations, follow-up analysis, or theoretical analysis |
| - CLASS 3: | further deliveries which resulted from the program and which are made available to the community (e.g. source catalogues, processed images or spectra in public data base) |
| - CLASS 4: | comments and suggestions from PI |