linkedin post 2021-03-17 06:06:00
Here we go again. Perhaps this is why an image speaks a thousand words. View in LinkedIn
linkedin post 2021-03-18 04:09:53
EXTREME ENERGY. “The turbulent and thermal components act together to support the gas against collapse and create an effective sound speed.” https://www.nature.com/articles/s41586-019-0873-4 View in LinkedIn
linkedin post 2021-03-19 05:36:19
EVERY GALAXY HAS ONE. “According to the current paradigm, galaxies are surrounded by extensive dark matter halos, and galaxies can grow in size when they come close enough to other galaxies for the dark matter to induce a merger. Many galaxies are also known to contain a supermassive black hole (SBH) at their center, and it is commonly assumed that SBHs are universally present in early-type galaxies and in the bulges of disk galaxies, at least for galaxies above a certain mass.” https://lnkd.in/dhkbfnG View in LinkedIn
linkedin post 2021-03-19 05:34:08
THIS ENDS the extraordinary modeling paper on black hole formation in the prestigious journal Nature. It is a difficult and technical paper, but well worth the effort. Black holes are understood almost exclusively by indirect methods and models such as this one. By definition, they cannot be seen, except by their surrounding fiery halo, or the gravitational waves when two merge; but they remain one of the most impressive and enigmatic structures in the universe. https://www.nature.com/articles/s41586-019-0873-4 View in LinkedIn
linkedin post 2021-03-19 05:32:57
CLUMPING. “As the cloud collapses, cooling instabilities can cause the gas to fragment into self-gravitating clumps. Such fragmentation can be stabilized by thermal pressure or centrifugal forces.” https://www.nature.com/articles/s41586-019-0873-4 View in LinkedIn
linkedin post 2021-03-19 05:32:03
MOMENT OF BLACK HOLE FORMATION. “For the LWH, the gas provides little or no thermal or turbulent support, and the gas is free to collapse on approximately the free-fall timescale.” (LWH = Lyman–Werner radiation flux). https://www.nature.com/articles/s41586-019-0873-4 View in LinkedIn
linkedin post 2021-03-19 05:30:53
GRAVITATIONAL COLLAPSE. “We see that the infall speed always exceeds the effective sound speed at some enclosed mass, indicating that, at this scale, the thermal and turbulent support cannot support the gas against gravitational collapse.” https://www.nature.com/articles/s41586-019-0873-4 View in LinkedIn
linkedin post 2021-03-18 04:10:35
THE TOTAL ENERGY OF THE COSMOS IS ZERO. “The Cosmos was born out of nothing, grew into nothing, is nothing and will remain nothing.” https://lnkd.in/dMS3ksU View in LinkedIn
linkedin post 2021-03-20 06:44:23
MECHANISTIC THEORIES. “Or ensemble of alleles that appears by mutation and then spreads from low frequencies by group selection. Instead, the key polyphenic allele (or allele ensemble) may in theory be previously fixed in the population by individual direct selection (as opposed to group selection), with solitary behavior the norm in most environments and eusocial behavior in other, rare and extreme environments. With a shift in the available environment in space or time, eusocial behavior would become the norm.” https://lnkd.in/drgWvGT View in LinkedIn