A staff of scientists has detected the presence of a high-energy neutrino—a very elusive particle—within the wake of a star’s destruction as it’s consumed by a black gap.
A staff of scientists has detected the presence of a high-energy neutrino—a very elusive particle—within the wake of a star’s destruction as it’s consumed by a black gap. This discovery, reported within the journal Nature Astronomy, sheds new mild on the origins of Ultrahigh Power Cosmic Rays—the best power particles within the Universe.
The work, which included researchers from greater than two dozen establishments, together with New York College and Germany’s DESY analysis heart, centered on neutrinos—subatomic particles which might be produced on Earth solely in highly effective accelerators.
Neutrinos—in addition to the method of their creation—are onerous to detect, making their discovery, together with that of Ultrahigh Power Cosmic Rays (UHECRs), noteworthy.
“The origin of cosmic high-energy neutrinos is unknown, primarily as a result of they’re notoriously onerous to pin down,” explains Sjoert van Velzen, one of many paper’s lead authors and a postdoctoral fellow in NYU’s Division of Physics on the time of the invention. “This consequence can be solely the second time high-energy neutrinos have been traced again to their supply.”
The next video, created by NASA, a analysis companion on the Nature Astronomy work, describes the findings in larger element (video credit score: NASA’s Goddard Area Flight Middle).
Previous research by van Velzen, now on the Netherlands’ Leiden College, and NYU physicist Glennys Farrar, a co-author of the brand new Nature Astronomy paper, discovered a few of the earliest proof of black holes destroying stars in what at the moment are generally known as Tidal Disruption Occasions (TDEs). These findings set the stage for figuring out if TDEs might be liable for producing UHECRs.
The analysis reported in Nature Astronomy provided assist for this conclusion.
Beforehand, the IceCube Neutrino Observatory, a Nationwide Science Basis-backed detector positioned within the South Pole, reported the detection of a neutrino, whose path was later traced by the Zwicky Transient Facility at Caltech’s Palomar Observatory.
Particularly, its measurements confirmed a spatial coincidence of a high-energy neutrino and lightweight emitted after a TDE—a star consumed by a black gap.
“This means these star shredding occasions are highly effective sufficient to speed up high-energy particles,” van Velzen explains.
“Discovering neutrinos related to TDEs is a breakthrough in understanding the origin of the high-energy astrophysical neutrinos recognized by the IceCube detector on the South Pole whose sources have to date been elusive,” provides Farrar, who proposed in a 2009 paper that UHECRs might be accelerated in TDEs. “The neutrino-TDE coincidence additionally sheds mild on a many years outdated drawback: the origin of Ultrahigh Power Cosmic Rays.”
Learn Ghost Particle From Star Shredded by Black Hole Reveals Cosmic Particle Accelerator for extra on this analysis.
Reference: “A tidal disruption occasion coincident with a high-energy neutrino” by Robert Stein, Sjoert van Velzen, Marek Kowalski, Anna Franckowiak, Suvi Gezari, James C. A. Miller-Jones, Sara Frederick, Itai Sfaradi, Michael F. Bietenholz, Assaf Horesh, Rob Fender, Simone Garrappa, Tomás Ahumada, Igor Andreoni, Justin Belicki, Eric C. Bellm, Markus Böttcher, Valery Brinnel, Rick Burruss, S. Bradley Cenko, Michael W. Coughlin, Virginia Cunningham, Andrew Drake, Glennys R. Farrar, Michael Feeney, Ryan J. Foley, Avishay Gal-Yam, V. Zach Golkhou, Ariel Goobar, Matthew J. Graham, Erica Hammerstein, George Helou, Tiara Hung, Mansi M. Kasliwal, Charles D. Kilpatrick, Albert Okay. H. Kong, Thomas Kupfer, Russ R. Laher, Ashish A. Mahabal, Frank J. Masci, Jannis Necker, Jakob Nordin, Daniel A. Perley, Mickael Rigault, Simeon Reusch, Hector Rodriguez, César Rojas-Bravo, Ben Rusholme, David L. Shupe, Leo P. Singer, Jesper Sollerman, Maayane T. Soumagnac, Daniel Stern, Kirsty Taggart, Jakob van Santen, Charlotte Ward, Patrick Woudt and Yuhan Yao, 22 February 2021, Nature Astronomy.
The analysis was supported by grants from the Nationwide Science Basis (CAREER grant 1454816, AAG grant 1616566, PIRE Grant 1545949, NSF grant AST-1518052)