- Watch full videoHen 2-428 - Wikipedia
The binary nature of the star at the centre of the nebula was discovered in 2014, when a study of why the nebula was not regular was conducted, resolving the previously thought single star into a double star. The two white dwarf stars forming the binary star system at the heart of the nebula orbit each other with a period of about 4 hours. The two stars have a combined mass of about 1.8 solar masses, with each star being slightly less massive than the S…
The binary nature of the star at the centre of the nebula was discovered in 2014, when a study of why the nebula was not regular was conducted, resolving the previously thought single star into a double star. The two white dwarf stars forming the binary star system at the heart of the nebula orbit each other with a period of about 4 hours. The two stars have a combined mass of about 1.8 solar masses, with each star being slightly less massive than the Sun. As of 2015, they are the most massive binary double white dwarf star system known.
The pair are expected to merge into a single star in about 700 million years, whereupon they will explode in a Type Ia supernova. The inspiralling of the stars is caused by the emission of gravitational waves, resulting in the loss of orbital energy. The explosion is due to the combined mass of the merged star exceeding the Chandrasekhar limit of 1.4 solar masses. This is the first candidate for binary double white dwarf star merger progenitor Type Ia supernova star system known. The system is important to astrophysicists as Type Ia supernovae are used as standard candles to measure the distance to faraway objects, thus understanding the process is important to regularize and quantify the variations in the standard candle to reduce the error uncertainty in determining distance.Wikipedia
Hen 2-428 is a planetary nebula with a binary double white dwarf system core. This core star system is the first discovered candidate for Type Ia supernova through binary white dwarf merger process. At the time of its discovery, the star system at the core was the heaviest known double white dwarf binary star system.
Continue readingThe planetary nebula is asymmetric, which is the result of there being not a single star, but a binary system at the heart of the nebula.
Continue reading• M. Santander-Garcıa; P. Rodrıguez-Gil; R. L. M. Corradi; D. Jones; B. Miszalski; H. M. J. Boffin; M. M. Rubio-Dıez; M. M. Kotze (2 September 2014). "The double-degenerate, super-Chandrasekhar nucleus of the planetary nebula Henize 2-428" (PDF). Nature. 519 (7541) (published 9 February 2015): 63–65. arXiv:1609.00178. Bibcode:2015Natur.519...63S. doi:10.1038/nature14124. PMID 25686608. S2CID 4407536.
Continue readingAll double-degenerate binary stars known in 2015
• V458 Vul
• SBS 1150+599A
• nucleus of TS 01
• MT Ser
• nucleus of Abell 41
• NGC 6026
• Fg 1Continue reading
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White dwarf - Wikipedia
White dwarfs are thought to be the final evolutionary state of stars whose mass is not high enough to become a neutron star or black hole.
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Two White Dwarf Stars Collided and Came Back from …
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Double white dwarfs - ru
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Mass transfer between double white dwarfs - Oxford Academic
May 1, 2004 · In this paper we study the stability of mass transfer in double white dwarf binary stars. In particular, we study whether, and under what circumstances, dissipative coupling of …
Two-Faced Star Exposed - www.caltech.edu
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Double trouble - Science | AAAS
Jun 4, 2020 · Enter another way to blow up a white dwarf. Astronomers know that two white dwarfs orbiting each other—a so-called double degenerate—can gradually spiral inward as …
In a companion paper by Roebber et al. (2020), we show that the Laser Interferometer Space Antenna (LISA) can detect ultra-short period (.10 min) double white dwarfs (DWDs) that are …
Astronomers Just Traced Mysterious Radio Pulses to an Unusual …
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A Star May Explode Next Week In Once-In-80-Years Event - Forbes
Mar 20, 2025 · A star called T Corona Borealis may "go nova" next week, making the star briefly visible to the naked eye. ... Stream And Photograph Saturday’s Weird ‘Double Sunrise’ ... the …
Two-Faced Star Exposed: Unusual White Dwarf Star Is Made Of …
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How White Dwarfs Get Their ‘Kicks’ - Science@NASA
Dec 4, 2007 · About 150 globular clusters exist in the Milky Way, each containing up to a million stars. The team studied 22 young white dwarfs less than 800 million years old and 62 older …
Webb telescope spots curious objects that aren't stars, or planets
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