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| Paper: |
The Application of the Multi-Dimensional Clustering Algorithm in the Field of Abell 383 |
| Volume: |
446, Galaxy Evolution: Infrared to Millimeter Wavelength Perspective |
| Page: |
103 |
| Authors: |
Fu, L.; Huang, Z.; Kilbinger, M.; Radovich, M.; Grado, A.; Puddu, E.; Shu, C.; Huang, J.-S. |
| Abstract: |
We propose a general multi-dimensional clustering algorithm to find
galaxy clusters and groups. Our algorithm selects galaxy cluster
candidates as overdensities in a multi-dimensional space including
angular position and colors. The redshifts of the candidates are
estimated by the median photometric redshift of potential cluster
members. We apply the multi-dimensional clustering algorithm to
Subaru data in five optical bands of the Abell 383 field. We detect
the well-studied Abell cluster A 383 at the 10σ level, and
correctly estimate its redshift of z ∼ 0.18. A new massive
component, 10 arc minutes away from the center of A 383, is found at
5σ confidence. The photometric redshift of this previously
unknown galaxy clump is similar to the one of A 383, suggesting that
it is a major sub-component of A 383. In addition, a cluster
candidate at redshift z = 0.62 is identified at 8σ.
Detections in X-ray and weak lensing confirm this overdensity to be
a newly found galaxy cluster. By fitting an NFW profile to the weak
lensing data, we derive a cluster mass of Mvir = 1.54–0.76+0.96 × 1014M☉. |
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