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☆ ‘Zombie star’ of supernova that exploded in 1181 revealed by study
▼ + stars: | 2024-08-13 | by ( Jacopo Prisco | ) edition.cnn.com time to read: +11 min

But Zijlstra, who was not involved with the new study, was the first to make the connection to SN 1181. The report suggested that SN 1181 might belong to the elusive Type Iax category of supernova due to the presence of this “zombie” white dwarf. That energy causes the sudden brightness of the supernova.”That massive collision might explain another curious aspect of the SN 1181 zombie star. “We theorize that the star reignited because SN 1181 was a Type Iax supernova, which is an incomplete explosion. Schaefer added that SN 1181 represents one of the few reliable connections from supernova to supernova remnant.

Persons: ”, Takatoshi Ko, Albert Zijlstra, Dana Patchick, Zijlstra, ” Zijlstra, “, coauthors, NASA's Chandra, ” Ko, Chandra, Ko, Bradley Schaefer, Schaefer, ” Schaefer, astrophysicists Organizations: CNN, Astrophysical, University of Tokyo, University of Manchester, Survey, NASA, ESA, JPL, Caltech, Subaru, Louisiana State University Locations: China, Japan, England, New Mexico, Hawaii

☆ Unusual type of stellar object discovered beaming out radio waves
▼ + stars: | 2023-07-20 | by ( Ashley Strickland | ) edition.cnn.com time to read: +5 min

In those moments, it became the brightest source of radio waves viewable from Earth through radio telescopes, acting like a celestial lighthouse. The object, dubbed GPM J1839−10, released radio waves every 22 minutes. “The object we’ve discovered is spinning way too slowly to produce radio waves — it’s below the death line,” Hurley-Walker said. “Assuming it’s a magnetar, it shouldn’t be possible for this object to produce radio waves. The intense, millisecond-long bursts of radio waves have unknown origins, but magnetars have been pinpointed as a potential cause.

Persons: Tyrone O’Doherty, ”, Natasha Hurley, Walker, Hurley, ” Hurley, it’s Organizations: CNN —, Curtin University, Curtin, International Centre for Radio Astronomy Research, Giant Locations: Australia, Western Australia, South Africa, India, USA

☆ A gamma-ray explosion that was so bright it blinded scientists' equipment is even weirder than first thought
▼ + stars: | 2023-06-09 | by ( Marianne Guenot | ) www.businessinsider.com time to read: +7 min

Scientists marveled at the power of the gamma-ray jet, which likely marked the birth of a black hole. Astronomers have since been trying to work out what could have made the gamma-ray burst so bright, and may finally have an answer. Researchers have discovered that the gamma-ray explosion ejected a jet with an unusual structure which dragged a large amount of stellar material along with it. The analysis demonstrates that the most extreme explosions do not obey the standard physics assumed for normal gamma-ray bursts, he said. Still, according to O'Connor, this finding "a massive step forward in our understanding of gamma-ray bursts," the "equivalent Rosetta stone of long GRBs."

Persons: marveled, —, Brendan O'Connor, Levan, Gladys Kober, O'Connor, NASA’s, Alexander van der Horst, Hendrik Van Eerten, Eleonora Troja, it's, Van Eerten Organizations: Service, George Washington University, Hubble, NASA, ESA, CSA, Radboud University, NASA’s Goddard Space, University of Bath, University of Rome

☆ Saudi Arabia considers new mining index in diversification push
▼ + stars: | 2022-11-04 | by ( Praveen Menon | ) www.reuters.com time to read: +3 min

Mining Minister Bandar bin Ibrahim al-Khorayef told Reuters in an interview in Sydney that his team met with Australian counterparts to learn more about a mining index, similar to Australia's ASX 300 Metals & Mining (XMM) sub-index (.AXMM) that lists metals and mining firms including producers of gold, steel and precious metals. "We have a secondary stock market in Saudi...its still evolving. "The whole idea (of a mining index) is to ensure that we have something that financing companies or financial institutions like banks can have good visibility on," he said. "We want to encourage people who offer services to mining companies to come to Saudi either directly or through partnering with some local people. Saudi is hosting the Future Minerals Forum in Riyadh in January, where it hopes to announce more details of its plans for the mining sector.

☆ Астрономы обнаружили загадочные вспышки сверхъяркого рентгеновского источника
▼ + stars: | 2021-04-06 | by ( Mld Media Srl | ) noi.md time to read: +1 min

Итальянские астрономы обнаружили необычную активность сверхъяркого рентгеновского источника NGC 4559 X7, располагающегося на расстоянии 29 миллионов световых лет от Земли. Известно, что в ней находятся два ярких источника рентгеновских лучей: X7 и X10. Астрономы построили кривую блеска NGC 4559 X7. Кроме того, в момент максимальной светимости объекта ученые наблюдали вспышечную активность, чего ранее не наблюдалось для этого Х7. По словам ученых, загадочные вспышки сверхъяркого рентгеновского источника (ULX) не могут быть объяснены только одним механизмом.

Persons: NuSTAR, Chandra Swift Locations: XMM, Земля, Волосы Вероника

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