Page 55 - Very Large Array News Today

Zoom In What we see from an active galaxy depends in large part on our viewing geometry. If the jet is aimed at us we can see high-energy light like X-rays and gamma rays. If we see the dust torus edge-on it can block most of the high-energy stuff and we only see optical or infrared light. Theres a whole menagerie of active galaxy types out there. Quasars tend to have a lot of high-energy light (the first was discovered by its X-ray emission) and early on were also seen to be powerful sources o...

Astronomers have discovered the most distant radio signal ever Its source is a radio loud quasar blasting out jets when the universe was still in its infancy. With assistance from the ESO’s Very Large Telescope (VLT), astronomers have discovered the most distant radio emission ever recorded. The source is a quasar so distant that its light has been travelling 13 billion years to reach us. That means that it existed when the Universe was just 780 or so million years old. This artist’s imp...

 E-Mail Astronomers using the National Science Foundations Karl G. Jansky Very Large Array (VLA) and Very Long Baseline Array (VLBA) have found and studied the most distant cosmic jet discovered so far -- a jet of material propelled to nearly the speed of light by the supermassive black hole in a quasar some 13 billion light-years from Earth. The quasar is seen as it was when the universe was only 780 million years old, and is providing scientists with valuable information about how galaxies e...

Astronomers found the distant radio source with the Magellan Telescope in Chile They then used the Very Large Telescope in Chile to study confirm it as a quasar Named P172+18 the team say it provides information on the early universe This is the most distant quasar ever discovered by astronomers dating to a point when the universe was just 780 million years old, study authors explained

Most distant cosmic jet discovered 13 billion light-years away This artist’s impression shows how the distant quasar P172+18 and its radio jets may have looked. To date (early 2021), this is the most distant quasar with radio jets ever found and it was studied with the help of ESO’s Very Large Telescope. It is so distant that light from it has travelled for about 13 billion years to reach us: we see it as it was when the Universe was only about 780 million years old. It has taken 13 billion...

 E-Mail IMAGE: Matthew Kerr, Ph.D., a research physicist at the U.S. Naval Research Laboratory, was part of an international team of astronomers and astrophysicists recognized by the 2020 American Association for the... view more  Credit: Matthew Kerr; U.S. Naval Research Laboratory WASHINGTON -- Imagine living in a large city. New York City, Los Angeles, or Washington. One morning you hear a siren off in the distance. You know the direction and that it was far away since it was just ...

By By Paul Cage, U.S. Naval Research Laboratory Corporate Communications WASHINGTON,   –   Imagine living in a large city. New York City, Los Angeles, or Washington. One morning you hear a siren off in the distance. You know the direction and that it was far away since it was just loud enough to hear. You wonder if it’s an emergency. What type of siren was it? Police, Fire, EMS? But you never hear it again. Time passes, then one night you hear ano...

 E-Mail 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... view more  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 supe...

 E-Mail IMAGE: The Zwicky Transient Facility captured this snapshot of tidal disruption event AT2019dsg, circled, on Oct. 19, 2019. view more  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 NASAs Neil Gehrels Swift Observatory, they traced the neutrino to a black hole tearing apart a star, a rare cataclysmic...

VLA Helps Astronomers Make New Discoveries About Star-Shredding Events Credit: Sophia Dagnello, NRAO/AUI/NSF Black holes that are millions or billions of times more massive than the Sun lurk at the cores of large galaxies and can have profound effects on their surroundings. One of the more exciting of those effects comes when a star ventures too close to the black hole and falls victim to that monster’s powerful gravitational pull. The star is shredded by tidal forces in a process colorfully ...