Details

Autor(en) / Beteiligte

• Burenin, R. A.
• Bikmaev, I. F.
• Khamitov, I. M.
• Zaznobin, I. A.
• Khorunzhev, G. A.
• Eselevich, M. V.
• Afanasiev, V. L.
• Dodonov, S. N.
• Rubiño-Martín, J.-A.
• Aghanim, N.
• Sunyaev, R. A.

Titel

Optical Identifications of High-Redshift Galaxy Clusters from the Planck Sunyaev–Zeldovich Survey

Ist Teil von

• Astronomy letters, 2018-05, Vol.44 (5), p.297-308

Ort / Verlag

Moscow: Pleiades Publishing

Erscheinungsjahr

2018

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We present the results of optical identifications and spectroscopic redshift measurements for galaxy clusters from the second Planck catalogue of Sunyaev–Zeldovich sources (PSZ2) located at high redshifts, z ≈ 0.7−0.9. We used the data of optical observations with the Russian–Turkish 1.5-mtelescope (RTT-150), the Sayan Observatory 1.6-m telescope, the Calar Alto 3.5-m telescope, and the 6-m SAO RAS telescope (BTA). The spectroscopic redshift measurements were obtained for seven galaxy clusters, including one cluster, PSZ2 G126.57+51.61, from the cosmological sample of the PSZ2 catalogue. In the central regions of two clusters, PSZ2 G069.39+68.05 and PSZ2 G087.39−34.58, we detected arcs of strong gravitational lensing of background galaxies, one of which is at redshift z = 4.262. The data presented below roughly double the number of known galaxy clusters in the second Planck catalogue of Sunyaev–Zeldovich sources at high redshifts, z ≈ 0.8.