愚蠢人
发表于 2025-3-25 03:29:17
Are There Massive Black Holes in Galactic Nuclei?,nsidering the cosmic history of the quasar population. The evidence for massive black holes in the centres of some nearby galaxies is reviewed. Some interesting observational consequences (. flares from tidally disrupted stars) are proposed and discussed.
帐单
发表于 2025-3-25 09:11:30
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Commemorate
发表于 2025-3-25 14:11:59
https://doi.org/10.1007/978-94-009-0565-8Dark matter; Gravity; Universe; black hole; black holes; cosmic microwave background; galaxies; gravitation
搏斗
发表于 2025-3-25 18:02:39
978-94-010-6742-3Kluwer Academic Publishers 1990
耕种
发表于 2025-3-25 23:26:47
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Parameter
发表于 2025-3-26 01:19:49
How Many Baryons are There?,An overview of baryonic dark matter is presented from a cosmogonical perspective.
INCUR
发表于 2025-3-26 05:25:48
White Dwarfs and the Local Mass Density,heoretically calculated within models of Galactic evolution. Depending on the details of these models the invisible mass fraction in the solar neighbourhood is of the order of 2 ... or 4% of the dynamical mass. A redetermination of the white dwarf birth rate yields a somewhat higher value than currently assumed.
悲观
发表于 2025-3-26 11:25:27
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尊重
发表于 2025-3-26 14:44:55
Index for 2.2 (System No., References),em and the evolution of planetary and satellite surfaces, is the question of how accurately to determine cometary masses. Even the intrinsic brightness distribution of comets, corrected for observational selection effects, is not generally agreed, while estimates of the masses of comets, mostly base
Coronary
发表于 2025-3-26 19:50:16
Index for 2.2 (System No., References),m predict that dark matter in the form of fossil planetesimals is likely to be present in two locations: an extended spherical cloud with semi-major axes between 10. AU and 4 × 10. AU, and a flat disk in the region of the outer planets or just beyond them. The outer part of the extended cloud is pro