linkedin post 2021-07-01 04:18:56

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FEEDBACK LOOP. “In our model, the gas content of massive galaxies is strongly dependent on the radio-mode AGN feedback, which suppresses cooling in massive haloes at low redshift. Low cold gas fractions may retard the loss of angular momentum due to smaller viscosity and thus, the cold gas flow on to the central BH may be suppressed.” (BH = black hole; AGN = active galactic nuclei). https://lnkd.in/d9JV8md View in LinkedIn
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linkedin post 2021-07-01 04:17:50

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GORGING. “The BH-to-bulge mass ratio was larger at higher redshifts than expected from the local BH–bulge mass relation. This eventually implies that BHs were accreting more gas and thus, growing faster than the corresponding bulges at high redshifts than at lower ones.” (BH = black hole). https://lnkd.in/d9JV8md View in LinkedIn
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linkedin post 2021-07-01 04:15:57

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WOBBLY DISCS. “In a cosmological context, the expected rapid inflows can lead to more violent ‘stream fed’ disc instabilities, particularly at high redshift, which may drive BH feeding at high rates, and more dramatic morphological/dynamical transformation.” (BH = black hole). https://lnkd.in/d9JV8md View in LinkedIn
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linkedin post 2021-07-01 04:04:00

linkedin post 2021-07-01 04:04:00

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ONCE A MONTH MERGERS. “With this new discovery of neutron star-black hole mergers outside our galaxy, we have found the missing type of binary. We can finally begin to understand how many of these systems exist, how often they merge, and why we have not yet seen examples in the Milky Way.” The researchers believe that one of these violent mergers occurs about once a month within a billion light-years of Earth.“ https://www.cnn.com/2021/06/29/world/black-hole-neutron-star-merger-scn/index.html View in LinkedIn
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linkedin post 2021-07-02 04:09:37

linkedin post 2021-07-02 04:09:37

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WATTS. “Beckett is fascinated by Descartes scholastic method of revealing faith by reason and his steps of reasoning. Take the whole, break it into its parts, start with the simplest and list every possibility -- this what Beckett does with his lists of permutations -- except that there is no revealed truth for Beckett’s permutations. Cycles of futility, no dramatic conclusions. It is about pausing and feeling a sense of despair and then going on.” https://youtu.be/1t0HVAW9SOU View in LinkedIn
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linkedin post 2021-07-04 12:05:06

linkedin post 2021-07-04 12:05:06

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DUAL CHANGES. “Another example of how a new language changes a language that preceded it is the way the emergence of abstract science affected mathematics with scientists developing new kinds of mathematics to describe nature. Descartes’s analytic geometry and Newton’s differential calculus being two examples of this among many other examples.” https://link.springer.com/chapter/10.1007/978-3-030-59177-9_13 View in LinkedIn
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linkedin post 2021-07-02 04:08:32

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SO ENDS this section on black holes, one of the most extreme and fascinating phenomena in cosmology. Obviously, this was but a nibble at the subject, which is enormous and is covered by thousands of papers. Now we transition into how black holes give birth to white holes, their lesser-known offspring. https://lnkd.in/d9JV8md View in LinkedIn
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linkedin post 2021-07-04 12:04:12

linkedin post 2021-07-04 12:04:12

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CHANGING MEDIUM. “This observation of the effects of phonetic writing supports the notion that mathematics will change in the age of information, i.e. the age of computers and the Internet. Mathematics is, in fact, changing as is reported in the Wikipedia article Computer-assisted proof.” https://link.springer.com/chapter/10.1007/978-3-030-59177-9_13 View in LinkedIn
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