Quantcast
Last updated on April 15, 2014 at 21:23 EDT

Latest Blazar Stories

First Gamma Ray Study Gravitational Lens
2014-01-06 15:27:47

[ Watch the Video: Fermi Provides New Details About Gravitational Lenses ] Brett Smith for redOrbit.com - Your Universe Online A gravitational lens is created when a galaxy or other massive object bends and amplifies light heading toward an observer from a more distant source and a new paper from an international team of researchers has reported the first-ever gamma ray study of the cosmic phenomenon. The paper, which will be published in an upcoming edition of Astrophysical Journal...

2014-01-06 12:20:58

WASHINGTON, Jan. 6, 2014 /PRNewswire-USNewswire/ -- An international team of astronomers, using NASA's Fermi observatory, has made the first-ever gamma-ray measurements of a gravitational lens, a kind of natural telescope formed when a rare cosmic alignment allows the gravity of a massive object to bend and amplify light from a more distant source. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO) This accomplishment opens new avenues for research, including a novel way...

ALMA Observatory Reveals Black Hole's Eating Habits
2013-10-16 10:12:37

[ Watch the Video: Zooming In On Active Galaxy NGC 1433 ] Brett Smith for redOrbit.com - Your Universe Online New observations from the Atacama Large Millimeter/submillimeter Array (ALMA) in the high-altitude Atacama Desert of Chile have revealed new details about the powerful molecular-gas jets that stream out of supermassive black holes, according to two new studies published on Wednesday in the journal Astronomy & Astrophysics. The two studies describe the unique behaviors and...

Measuring All Light Since Big Bang May Provide Answers To Evolution Of Universe
2013-05-24 14:07:39

Lee Rannals for redOrbit.com — Your Universe Online Researchers wrote in The Astrophysical Journal that they have made the best measurement of all the light in the universe since the Big Bang yet. Measuring the number and energy of each particle of light or photon since the Big Bang could provide secrets about the nature and evolution of the Universe, such as how similar or different ancient galaxies were compared to the galaxies today. The researchers made the most accurate...

Most Distant Source Of High-Energy Gamma Rays Comes From Distant Blazar
2013-04-19 04:57:41

April Flowers for redOrbit.com - Your Universe Online Of all the active galactic nuclei, blazars are the brightest and emit very high-energy gamma rays. A team led by physicists from the University of California, Santa Cruz (UCSC), has made new observations of the blazar known as PKS 1424+240 that reveal it is the most distant known source of very high-energy gamma rays. The emission spectrum of PKS 1424+240 now appears highly unusual in the light of new data. Data from the Hubble Space...

Origin Of Gamma Ray Flare Far Away From Their Galaxy’s Black Hole
2013-01-08 13:18:26

redOrbit Staff & Wire Reports - Your Universe Online The source of a gamma ray flare that shot past Earth throughout much of 2011 has been discovered, and contrary to popular theory, they did not occur close to their galaxy´s central black hole, NASA officials announced on Monday. Using data collected by both the Fermi Gamma-ray Space Telescope and the National Science Foundation's Very Long Baseline Array (VLBA), astronomers at the U.S. space agency have discovered that the...

2013-01-07 20:21:06

WASHINGTON, Jan. 7, 2013 /PRNewswire-USNewswire/ -- In 2011, a months-long blast of energy launched by an enormous black hole almost 11 billion years ago swept past Earth. Using a combination of data from NASA's Fermi Gamma-ray Space Telescope and the National Science Foundation's Very Long Baseline Array (VLBA), the world's largest radio telescope, astronomers have zeroed in on the source of this ancient outburst. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO)...

All Black Holes Launch Fundamentally Similar High-Speed Jets
2012-12-14 11:31:15

April Flowers for redOrbit.com - Your Universe Online It would be a mistake to think of black holes as having a uniformity of size or mass. They range from modest objects formed from the end of an individual stars' life to behemoths billions of times more massive that rule the centers of galaxies. A new study recently published in the journal Science, however, shows that high-speed jets launched from active black holes share fundamental similarities despite the mass, age or...

2012-11-01 15:21:28

WASHINGTON, Nov. 1, 2012 /PRNewswire-USNewswire/ -- Astronomers using data from NASA's Fermi Gamma-ray Space Telescope have made the most accurate measurement of starlight in the universe and used it to establish the total amount of light from all of the stars that have ever shone, accomplishing a primary mission goal. (Logo: http://photos.prnewswire.com/prnh/20081007/38461LOGO ) "The optical and ultraviolet light from stars continues to travel throughout the universe even after...

Starlight Measured In Detail By Fermi
2012-11-01 13:50:08

[ Watch the Video: NASA's Fermi Explores the Early Universe ] Lee Rannals for redOrbit.com - Your Universe Online Astronomers have made the most accurate measurement of starlight in the universe and have used this to establish the total amount of light from all of the stars that have ever shone. A team used data from NASA's Fermi Gamma-Ray Space Telescope to find the total sum of starlight in the universe, or the extragalactic background light (EBL). Gamma rays are the most...


Latest Blazar Reference Libraries

6_0ba47eab12382e6a4e2cc12b1c7ddf782
2004-10-19 04:45:42

Quasar -- A quasar (from quasi-stellar radio source) is an astronomical object that looks like a star in optical telescopes (i.e. it is a point source), but has a very high redshift. The general consensus is that this high redshift is cosmological, the result of Hubble's law and that their redshift indicates that they are typically very distant from Earth; we observe them as they were several billions of years ago. Since we can see them despite their distance, they must emit more...

6_3e166ea744352dc86330d77d6feb4abd2
2004-10-19 04:45:41

Active Galaxy -- An active galaxy is a galaxy where a significant fraction of the energy output is not emitted from normal stellar populations or interstellar gas. This energy, depending on the active galaxy type, can be emitted across most of the electromagnetic spectrum, as infrared, radio waves, UV, X-ray and gamma rays. Frequently, the abbreviation AGN (Active Galactic Nuclei) is used, since most of the active galaxies emit most of their radiation from a narrow region in their...

More Articles (2 articles) »