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Astronomers Uncover 'Extreme' Ultra-Dense, Moon-Sized White Dwarf Nearing Collapse

Astronomers Uncover ‘Extreme’ Ultra-Dense, Moon-Sized White Dwarf Nearing Collapse
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Sputnik International
https://sputniknews.com/science/202107031083296393-astronomers-uncover-extreme-ultra-dense-moon-sized-white-dwarf-nearing-collapse/
White dwarfs are ancient stars that develop after having exhausted their nuclear fuel and expelling the majority of its outer materials. Typically, said stars carry about half the mass of the Sun and maintain a size just slightly larger than the Earth. However, that’s not the case for all, it seems.
Astronomers surveying the cosmos have uncovered quite the unusual and highly unexpected find: a white dwarf star similar in size to the Earth’s moon that has a mass far greater than the Sun. ....

Ilaria Caiazzo , Caltech Palomar , Zwicky Transient Facility , Palomar Observatory , கால்டெக் ப்யாலமர் , ப்யாலமர் கண்காணிப்பு ,

Smallest, most massive white dwarf on verge of collapse to neutron star – Astronomy Now

Smallest, most massive white dwarf on verge of collapse to neutron star – Astronomy Now
astronomynow.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from astronomynow.com Daily Mail and Mail on Sunday newspapers.

Giuseppe Parisi , Ilaria Caiazzo , Caltech Palomar , Zwicky Transient Facility , கால்டெக் ப்யாலமர் ,

Astronomers discover a small yet massive white dwarf star

Astronomers discover a small yet massive white dwarf star
slashgear.com - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from slashgear.com Daily Mail and Mail on Sunday newspapers.

Zwicky Transient Facility , Caltech Palomar , கால்டெக் ப்யாலமர் ,

Scientists link star-shredding event to origins of universe's highest-energy particles

Scientists link star-shredding event to origins of universe's highest-energy particles
nsf.gov - get the latest breaking news, showbiz & celebrity photos, sport news & rumours, viral videos and top stories from nsf.gov Daily Mail and Mail on Sunday newspapers.

Sjoert Van Velzen , Caltech Palomar , Hans Krimm , Ultrahigh Energy Cosmic Rays , Research News , Nsfpublic Affairs , Division Of Astronomical Sciences , Us National Science , York University , Science Foundation Funded , Ultrahigh Energy Cosmic , New York University , Icecube Neutrino Observatory , South Pole , Zwicky Transient Facility , Astronomical Sciences , கால்டெக் ப்யாலமர் , ஹான்ஸ் க்ரீம்ம் , ஆராய்ச்சி செய்தி , பிரிவு ஆஃப் வானியல் அறிவியல் , எங்களுக்கு தேசிய அறிவியல் , யார்க் பல்கலைக்கழகம் , அறிவியல் அடித்தளம் நிதியுதவி , புதியது யார்க் பல்கலைக்கழகம் , ஐஸ்க்யூப் நியூட்ரினோ கண்காணிப்பு , தெற்கு போலே ,

Star's destruction reveals elusive high-energy neutrino

This discovery, reported in the journal
Nature Astronomy, sheds new light on the origins of ultrahigh energy cosmic rays the highest energy particles in the universe.
“This suggests these star shredding events are powerful enough to accelerate high-energy particles.”
The work focused on neutrinos subatomic particles that are produced on Earth only in powerful accelerators.
Neutrinos as well as the process of their creation are hard to detect, making their discovery, along with that of ultrahigh energy cosmic rays (UHECRs), noteworthy.
“The origin of cosmic high-energy neutrinos is unknown, primarily because they are notoriously hard to pin down,” explains Sjoert van Velzen, one of the paper’s lead authors and a postdoctoral fellow in New York University’s physics department at the time of the discovery. “This result would be only the second time high-energy neutrinos have been traced back to their source.” ....

Glennys Farrar , Sjoert Van Velzen , Caltech Palomar , Leiden University , National Science Foundation , York University , National Science , Nature Astronomy , New York University , Icecube Neutrino Observatory , National Science Foundation Backed , South Pole , Zwicky Transient Facility , கால்டெக் ப்யாலமர் , தேசிய அறிவியல் அடித்தளம் , யார்க் பல்கலைக்கழகம் , தேசிய அறிவியல் , இயற்கை வானியல் , புதியது யார்க் பல்கலைக்கழகம் , ஐஸ்க்யூப் நியூட்ரினோ கண்காணிப்பு , தெற்கு போலே ,