Ripples in spacetime suggest a black hole swallowed a neutron star

first_img Taking 3 and 5🌞masses as our “cut-off” labels for #NeutronStars or #BlackHoles is a useful rule-of-thumb but it could be wrong – or at least not the full picture. So #S190814bv *could* still be 2 merging #BlackHoles… Lots more careful analysis may tell us the answer!… 3/5 pic.twitter.com/0RSc5jk0xc— LIGO (@LIGO) August 17, 2019 7 Tags 16 Photos That throws up an exciting possibility that one of the black holes would be lighter than any black hole we’ve ever seen before. We can’t lose!If the event is confirmed as a neutron star-black hole merger, it would complete LIGO and Virgo’s trifecta of cosmic detections. The facilities have seen black holes merge with black holes and neutron stars merge with neutron stars, but they’ve never seen the two obliterate one another.The next step is to focus telescopes on the small section of the sky S190814bv came from. It’s relatively close, by cosmic standards, at just 900 million light-years away. The gravitational waves race out faster than other electromagnetic waves, giving astronomers a chance to try and detect other signals emitted by the event. What will we see?”We will either see a neutron star being ripped apart by a black hole, or getting swallowed whole like Pac-Man swallowing a ghost,” says Simon Stevenson, an astronomer with Swinburne University of Technology in Australia. “Either way, we are in for a show!”  Share your voicecenter_img What is a black hole? The universe’s dark, mysterious monsters Comments Black hole, meet neutron star. Neutron star, this is black hole. Play nice. Carl Knox/OzGrav ARC Centre of Excellence Astronomers watching the cosmos for faint ripples in space-time may have detected a black hole swallowing up a neutron star for the very first time. Gravitational wave observatories in the US and Europe were switched back on after upgrades in April to hunt for these extreme cosmic events, and since then have detected 23 potential cosmic wobbles. The latest is perhaps the most exciting yet — and it’s also potentially the most puzzling.The event, designated S190814bv, was detected on Aug. 14 by the finely-tuned lasers of the twin LIGO detectors in the US and the Virgo detector in Italy. The facilities picked up ripples in the fabric of the universe and have, tentatively, suggested they resulted from a collision between a black hole and a small, dense star known as a “neutron star”.The facilities have seen potential black hole-neutron star collisions in the past, but none have been adequately verified. Since switching back on in April, only three candidates for this insane type of cosmic collision have been presented with varying levels of confidence. That’s because the detectors are so fine-tuned they sometimes flag noise as real events.For S190814bv, the chance the newly-detected signal is just noise is 1 in 10 septillion years.That would even put Han Solo off believing S190814bv is anything but a neutron star-black hole merger, but the researchers are still urging caution. It could be, they say, two merging black holes. Sci-Techlast_img read more

Sri Lanka blast victim Zayan buried

first_imgZayan Chowdhury. File PhotoZayan Chowdhury, one of the victims of Easter Sunday bombings in Sri Lanka, was laid to rest at Banani Graveyard in the city on Wednesday evening, reports UNB.Earlier, a Sri Lankan Airlines flight carrying the body of Zayan, 8, the grandson of Awami League leader Sheikh Fazlul Karim Selim, landed at Hazrat Shahjalal International Airport around 12:40pm. His body was then taken to their Banani residenceThe namaz-e-janaza of Zayan was held at Banani Club Field after Asr prayers.Later, he was buried at the Banani Graveyard around 6:00pm.Earlier, prime minister Sheikh Hasina went to her paternal cousin Sheikh Selim’s Banani residence to console the family members of the victim.Sheikh Hasina stayed there for over an hour and consoled the family members of Zayan Chowdhury. A heart-rending scene was created at that time.Sheikh Hasina also prayed for the eternal peace of the departed soul of Zayan.A second grader of an Uttara school, Zayan is a son of Moshiul Haque Chowdhary and Sheikh Sonia.Zayan and more than 350 others were killed in explosions in Sri Lanka on Easter Sunday. He had gone there with his family on a vacation.Moshiul also suffered splinter injuries in his kidney and liver in the deadly terror attack in Sri Lanka’s capital on Easter Sunday.last_img read more