Bibcode
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.
Bibliographical reference
Astronomy Letters, Volume 44, Issue 5, pp.297-308
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5
2018
Journal
Citations
26
Refereed citations
23
Description
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.
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