排序方式： 共有33条查询结果，搜索用时 34 毫秒
31.
V. S. Vorobyev R. A. Burenin I. F. Bikmaev I. M. Khamitov S. N. Dodonov R. Ya. Zhuchkov E. N. Irtuganov A. V. Mescheryakov S. S. Melnikov A. N. Semena A. Yu. Tkachenko N. Aghanim R. A. Sunyaev 《Astronomy Letters》2016,42(2):63-68
We present the results of spectroscopic redshift measurements for the galaxy clusters from the first all-sky Planck catalogue that have been mostly identified based on the optical observations performed previously by our team (Planck Collaboration 2015a). Data on 13 galaxy clusters at redshifts from z ≈ 0.2 to z ≈ 0.8, including the improved identification and redshift measurement for the cluster PSZ1 G141.73+14.22 at z = 0.828, are provided. We have performed the measurements based on data from the Russian–Turkish 1.5-m telescope (RTT-150), the 2.2-m Calar Alto Observatory telescope, and the 6-m SAO RAS telescope (Bolshoy Teleskop Azimutalnyi, BTA). 相似文献
32.
G. A. Khorunzhev S. Yu. Sazonov R. A. Burenin A. Yu. Tkachenko 《Astronomy Letters》2012,38(8):475-491
The masses of 68 supermassive black holes (SMBHs) in nearby (z < 0.15) active galactic nuclei (AGNs) detected by the INTEGRAL observatory in the hard X-ray energy band (17?C60 keV) outside the Galactic plane (|b| 5°) have been estimated. Well-known relations between the SMBHmass and (1) the infrared luminosity of the stellar bulge (from 2MASS data) and (2) the characteristics of broad emission lines (from RTT-150 data) have been used. A comparison with the more accurate SMBH mass estimates obtained by the reverberation-mapping technique and from direct dynamical measurements is also made for several objects. The SMBH masses derived from the correlation with the bulge luminosity turn out to be systematically higher than the estimates made by other methods. The ratio of the bolometric luminosity to the critical Eddington luminosity has been found for all AGNs. It ranges from 1 to 100% for the overwhelming majority of objects. 相似文献
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