GW200115: Simulation of a Black Hole Merging with a Neutron Star

What happens when a black hole destroys a neutron star? Analyses indicate that just such an event created gravitational wave event GW200115, detected in 2020 January by LIGO and Virgo observatories. To better understand the unusual event, the featured visualization was created from a computer simulation. The visualization video starts with the black hole (about 6 times the Sun’s mass) and neutron star (about 1.5 times the Sun’s mass) circling each other, together emitting an increasing amount of gravitational radiation. The picturesque pattern of gravitational wave emission is shown in blue. The duo spiral together increasingly fast until the neutron star becomes completely absorbed by the black hole. Since the neutron star did not break apart during the collision, little light escaped — which matches the lack of an observed optical counterpart. The remaining black hole rings briefly, and as that dies down so do the emitted gravitational waves. The 30-second time-lapse video may seem short, but it actually lasts about 1000 times longer than the real merger event. via NASA

Wikipedia article of the day for July 14, 2021

Wikipedia article of the day is Squirm. Check it out: Article-Link Summary: Squirm is a 1976 American horror film written and directed by Jeff Lieberman, starring Don Scardino, Patricia Pearcy, R.ย A. Dow, Jean Sullivan, Peter MacLean, Fran Higgins and William Newman. The film takes place in the fictional town of Fly Creek, Georgia, which becomes infested with carnivorous worms due to a downed power line. Lieberman’s script is based on a childhood incident in which his brother fed electricity into a patch of earth, causing earthworms to rise to the surface. Millions of worms were used over the five-week filming in Port Wentworth, Georgia; worms were brought in from Maine to augment local supplies. Makeup artist Rick Baker (pictured) provided the special effects, using prosthetic makeup. After American International Pictures picked up Squirm for distribution, it was edited to remove the more graphic scenes in a failed attempt to lower its “R” rating to “PG”. The film was a commercial success, but had lukewarm reviews. It has since become a critical favorite and a cult classic.