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Flying on planet-forming wings

ESO, European Organisation for Astronomical Research in the Southern Hemisphere ....

Large Telescope , Atacama Large , Submillimeter Array , Eso Org , La Silla , பெரியது தொலைநோக்கி , சுபிமிள்ழிமேட்டேர் வரிசை , எஸொ ஒர்க் , லா சில்லா ,

Ghost particle from shredded star reveals cosmic particle accelerator

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IMAGE: Smoking gun: After the supermassive black hole tore the star apart, roughly half of the star debris was flung back out into space, while the remainder formed a glowing accretion.
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Credit: Credit: DESY, Science Communication Lab
Tracing back a ghostly particle to a shredded star, scientists have uncovered a gigantic cosmic particle accelerator. The subatomic particle, called a neutrino, was hurled towards Earth after the doomed star came too close to the supermassive black hole at the centre of its home galaxy and was ripped apart by the black hole s colossal gravity. It is the first particle that can be traced back to such a tidal disruption event (TDE) and provides evidence that these little understood cosmic catastrophes can be powerful natural particle accelerators, as the team led by DESY scientist Robert Stein reports in the journal ....

Hale Telescope , United States , Nordrhein Westfalen , Sjoert Van Velzen , Marek Kowalski , Cecilia Lunardini , Anna Franckowiak , Robert Stein , Mount Palomar , Francis Halzen , Karlg Jansky , Humboldt University , German Federal Ministry Of Education , Arizona State University , University Of Bochum , Us Antarctic Program , University Of Wisconsin , Helmholtz Association , Spectral Energy Distribution Machine , Mission Xmm Newton , Us National Science Foundation , Zwicky Transient Facility , South Pole , Large Hadron Collider , Walter Winter , Zwicky Transient ,

Scientists claim that all high-energy cosmic neutrinos are born by quasars

Credit: Felipe Pedreros
Scientists of the P. N. Lebedev Physical Institute of the Russian Academy of Sciences (LPI RAS), the Moscow Institute of Physics and Technology (MIPT) and the Institute for Nuclear Research of RAS (INR RAS) studied the arrival directions of astrophysical neutrinos with energies more than a trillion electronvolts (TeV) and came to an unexpected conclusion: all of them are born near black holes in the centers of distant active galaxies powerful radio sources. Previously, only neutrinos with the highest energies were assumed to be obtained in sources of this class.
It is believed that there are massive black holes in the centers of active galaxies in our universe. They are the heart of these objects with a luminosity of hundreds of millions of suns. Active galaxies, they are also simply quasars, are clearly visible from the earth with both optical and radio telescopes. ....

United States , Mediterranean Sea , Oceans General , Kabardino Balkariya , Yuri Kovalev , Alexander Plavin , Ice Cube , Sergey Troitsky , Russian Academy Of Sciences , Russian Academy Of Sciences Sergey Troitsky , Institute For Nuclear Research , Moscow Institute Of Physics , Irkutsk State University , Ministry Of Education , Lebedev Physical Institute , Russian Academy , Moscow Institute , Nuclear Research , Cherenkov Icecube , Lake Baikal , Astrophysical Journal , Sciences Sergey , Hamburg Account , Irkutsk State , Baksan Neutrino Observatory , North Caucasus ,

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

A team of scientists has detected the presence of a high-energy neutrino in the wake of a star s destruction as it is consumed by a black hole. This discovery sheds new light on the origins of Ultrahigh Energy Cosmic Rays the highest energy particles in the Universe. ....

Glennys Farrar , Sjoert Van Velzen , Caltech Palomar , Netherland Leiden University , National Science Foundation , National Science , Ultrahigh Energy Cosmic Rays Uhecrs , Ultrahigh Energy Cosmic Rays , Ultrahigh Energy Cosmic , Department Of Physics , York University , Nature Astronomy , Ultrahigh Energy Cosmic Rays The , New York University , Tidal Disruption Events , Icecube Neutrino Observatory , National Science Foundation Backed , South Pole , Zwicky Transient Facility , Atomic Molecular Particle Physics , Space Planetary Science , Stars The Sun , கால்டெக் ப்யாலமர் , தேசிய அறிவியல் அடித்தளம் , தேசிய அறிவியல் , துறை ஆஃப் இயற்பியல் ,

NASA's Swift helps tie neutrino to star-shredding black hole

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IMAGE: The Zwicky Transient Facility captured this snapshot of tidal disruption event AT2019dsg, circled, on Oct. 19, 2019.
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Credit: ZTF/Caltech Optical Observatories
For only the second time, astronomers have linked an elusive particle called a high-energy neutrino to an object outside our galaxy. Using ground- and space-based facilities, including NASA s Neil Gehrels Swift Observatory, they traced the neutrino to a black hole tearing apart a star, a rare cataclysmic occurrence called a tidal disruption event.
Astrophysicists have long theorized that tidal disruptions could produce high-energy neutrinos, but this is the first time we ve actually been able to connect them with observational evidence, said Robert Stein, a doctoral student at the German Electron-Synchrotron (DESY) research center in Zeuthen, Germany, and Humboldt University in Berlin. But it seems like this particular event, called AT2019dsg, didn t generate the neu ....

United Kingdom , United States , Goddard Space Flight Center , New Mexico , Los Alamos National Laboratory , Robert Stein , Jeanette Kazmierczak , Sjoert Van Velzen , S Bradley Cenko , Cecilia Lunardini , National Science Foundation Icecube Neutrino Observatory , University Of Leicester , Humboldt University , Leiden University , Mullard Space Science Laboratory , European Space Agency Xmm Newton , Arizona State University In Tempe , Italian Space Agency , Gehrels Swift Observatory , German Electron Synchrotron , Nature Astronomy , Zwicky Transient Facility , Palomar Observatory , European Space Agency , National Radio Astronomy Observatory , Very Large Array ,