linkedin post 2021-03-16 05:12:01

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OPTION OF NEGATIVE MASS. “Epistemologically, it seems that a universe of negative mass (but no positive mass) presents no logical or conceptual difficulties for general relativity or electromagnetism--although such difficulties may arise in other branches of physics.” https://lnkd.in/dNZ9PdK View in LinkedIn
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linkedin post 2021-03-16 05:10:26

linkedin post 2021-03-16 05:10:26

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BLACK HOLE CLUMPING. “The medium within the cold disk is turbulent, which causes numerous weak shocks. The disk then fragments into three clumps, which all of which proceed to collapse because thermal pressure and rotational forces cannot counteract the gravitational forces of the clumps.” https://www.nature.com/articles/s41586-019-0873-4 View in LinkedIn
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linkedin post 2021-03-16 05:08:27

linkedin post 2021-03-16 05:08:27

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BLACK HOLE CRITICAL POINT. “The simulations follow the evolution of the target haloes until they reach a density of 10(-15) g cm(-3), at which point it is certain that a collapsed object will form. Both haloes form a gravitationally unstable core.” https://www.nature.com/articles/s41586-019-0873-4 View in LinkedIn
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linkedin post 2021-03-16 05:05:20

linkedin post 2021-03-16 05:05:20

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FORMATION OF MASSIVE BLACK HOLES. “Most of the accreted matter originates from the parent filament, a major merger and several minor halo mergers. This rapid convergence of matter below the atomic-cooling limit is a prediction of the standard cold dark-matter paradigm, and in conflict with cosmologies that suppress power below the atomic-cooling limit. Nevertheless, rapid convergence is rare, occurring in only about 0.03% of haloes with similar masses and that exist in an large-scale overdense environment.” Worth the effort! https://www.nature.com/articles/s41586-019-0873-4 View in LinkedIn
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linkedin post 2021-03-17 06:02:38

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INFINITY. “Go to a scientific dictionary and the definitions get mathematical but not necessarily less absolute, like “mathematical quantity that is larger than any fixed assignable quantity”, “the result of dividing any number by zero”, or even the mindbending “minus infinity – a quantity having a value that is less than any assignable value”. https://lnkd.in/drX5cEt View in LinkedIn
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linkedin post 2021-03-17 06:00:40

linkedin post 2021-03-17 06:00:40

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MASSIVE BLACK HOLE FORMATION. “The Renaissance simulations show that the target haloes remain metal-free and are not exposed to any ionizing radiation. Their thermodynamic evolution and collapse are therefore primarily controlled by the growth history of the halo and the impinging LW flux. With these priors, we can safely neglect star formation and feedback, focusing on the dynamics of collapse.” (LH = Lyman–Werner). https://www.nature.com/articles/s41586-019-0873-4 View in LinkedIn
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linkedin post 2021-03-17 05:59:11

linkedin post 2021-03-17 05:59:11

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COMPLETED MODEL. “We are confident that our simulation follows the complete star-formation history of all collapsed structure, and thus the metal-enrichment history of pre-galactic gas that is vital to determining the conditions for DCBH formation.” (DCBH = direct-collapse black holes). https://www.nature.com/articles/s41586-019-0873-4 View in LinkedIn
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