21Sep 2022 by Nigel Fleming No Comments

linkedin post 2021-06-25 03:44:44

Uncategorized
CORRELATIONS. “All of these studies in the hard and soft X-ray range find that the cosmic evolution of AGN is strongly dependent on the AGN luminosity: the number density of successively less luminous AGN peaks at lower redshifts, with the lowest luminosity AGN showing a basically constant number density.” (AGN = active galactic nuclei). https://lnkd.in/d9JV8md View in LinkedIn
Read More
21Sep 2022 by Nigel Fleming No Comments

linkedin post 2021-06-25 03:42:16

Uncategorized
EXPLAINING THE HEAVENS. “Our best-fitting model suggests a scenario in which disc instabilities are the main driver for moderately luminous Seyfert galaxies at low redshift, while major mergers are the main trigger for luminous AGN.” (AGN = active galactic nuclei). https://lnkd.in/d9JV8md View in LinkedIn
Read More
21Sep 2022 by Nigel Fleming No Comments

linkedin post 2021-06-25 03:41:05

Uncategorized
DOWNSIZING EXPLANATION. “With these three modifications, the models can explain the observed downsizing, successfully reproduce the bolometric AGN luminosity function and simultaneously reproduce galaxy and BH properties in the local Universe.” (BH = black hole; AGN = active galactic nuclei). https://lnkd.in/d9JV8md View in LinkedIn
Read More
21Sep 2022 by Nigel Fleming No Comments

linkedin post 2021-06-24 04:30:33

Uncategorized
WARP SPEED. “When the Chinese released the sequence of the SARS-CoV-2 virus, we started the process of making RNA the next day. A couple weeks later, we were injecting animals with the vaccine." A very long time to until the acceptance of mRNA vaccines, whose promises for the future are considerable. See my TEDx talk. https://lnkd.in/dc32WbP View in LinkedIn
Read More
21Sep 2022 by Nigel Fleming No Comments

linkedin post 2021-06-24 04:27:52

Uncategorized
HIERARCHICAL MODEL. “In this model, BHs evolve from light seeds (∼100 M⊙) and their growth is merger driven. The original Somerville et al. model (baseline model) reproduces the number density of AGN at intermediate redshifts and luminosities, but underproduces luminous AGN at very high redshift (z > 3) and overproduces them at low redshift (z < 1).” (BH = black hole; AGN = active galactic nuclei). https://lnkd.in/d9JV8md View in LinkedIn
Read More
21Sep 2022 by Nigel Fleming No Comments
linkedin post 2021-06-27 04:31:40

linkedin post 2021-06-27 04:31:40

Uncategorized
CLAY TABLET WRITING. “The impressed token shape signs for the large and small measure of wheat came to represent the numerals 10 and 1 respectively. The second class of signs, etched signs representing the commodities and hence represented words. The Sumerians quickly realized that they could represent spoken words other than agricultural commodities with etched signs and so writing emerged to represent spoken language and also abstract numbers.” https://link.springer.com/chapter/10.1007/978-3-030-59177-9_13 View in LinkedIn
Read More