群居动物
发表于 2025-3-25 07:04:03
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减去
发表于 2025-3-25 07:50:13
Redshift measurements of the brightest cluster galaxies of the gravitational lens 0957+561,d centre for the cluster and a tentative value for its radial velocity dispersion ≈ 550 km s−1. These data also provide evidence that there may be an additional group or cluster of galaxies at . = 0.503.
metropolitan
发表于 2025-3-25 15:08:40
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SEED
发表于 2025-3-25 17:10:32
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走路左晃右晃
发表于 2025-3-25 23:24:02
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Kaleidoscope
发表于 2025-3-26 03:19:37
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衣服
发表于 2025-3-26 06:50:27
Optical observations of gravitational lenses,cases (essentially multiply imaged quasars and micro-lensed candidates. Preliminary results of lensing statistics applied to a sample of more than 200 highly luminous quasars are then presented both for the effectiveness parameter . of galaxies and for the density parameter .. of compact lenses to produce macro-lensed images of distant quasars.
用手捏
发表于 2025-3-26 10:00:47
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multiply
发表于 2025-3-26 12:43:55
Steckt der Teufel im Teilchen?,ly recent analysis of early X-ray observations yields a core-halo model consistent with models for the lens. The ultimate uncertainty achievable for point estimates of the Hubble constant Ho remains larger than initially hoped for.
带伤害
发表于 2025-3-26 19:22:43
Inverse Systems – Nanoporous Solidsde difference of ≤ 1.5 mag. Galaxy count statistics around 94 quasars with photometric data are analysed. Within radii of 6″, 10″, and 15″, and down to a Gunn . magnitude of 23, we find no significant enhancement of galaxy density over the background counts.