Articles tagged with Active Galaxies
Astronomers have discovered a distant galaxy that erupts roughly every 114 days, creating a 'cosmic Old Faithful'. Using data from NASA's Neil Gehrels Swift Observatory and Transiting Exoplanet Survey Satellite, scientists studied repeated outbursts of an event called ASASSN-14ko.
Researchers at the University of Colorado Boulder found that single activations of black holes occur more often in mismatched galaxy mergers, where one galaxy is huge and the other is puny. This is because violent collisions lead to less gas and dust falling onto black holes, making it less likely for two black holes to become active.
Researchers found that Type I galaxies have more efficient supermassive black holes, emitting energy faster compared to Type II galaxies
Researchers studied nuclear obscuration in AGN using infrared and X-ray studies, revealing complex gas and dusty clouds orbiting the black hole. The material is connected to the galaxy via outflows and inflows of gas, regulating star formation.
The UVOT telescope on NASA's Swift satellite has captured over 100 breathtaking images of the cosmos, including comets, star clusters, and supernova remnants. These images provide valuable data for scientists studying gamma-ray bursts, stellar evolution, and the properties of rare stars.
The conference aimed to examine recent developments in active galactic nuclei and their effect on star formation. Researchers now believe that the energy released by supermassive black holes controls this process, which is crucial for galaxy evolution.
Researchers found five to ten times more massive galaxies existed 1.5 billion years after the Big Bang, with high infrared luminosities indicating intense growth and activity, challenging current understanding of galaxy formation.
Astronomers at Texas A&M University have discovered that a significant fraction of ancient galaxies in the CLG J02182-05102 cluster are still actively forming stars. The team found that star-forming galaxies are more common in this cluster than in nearby galaxy clusters.
Researchers have discovered a connection between giant gas clouds and the formation of active galactic nuclei, which power the bright centers of some galaxies. The study suggests that gas clouds can either be consumed by supermassive black holes or give birth to new stars, leading to increased activity.
Astronomers discover rare 'Green Pea' galaxies through Galaxy Zoo project, finding compact galaxies forming stars at high rates. The galaxies, 10 times smaller than Milky Way and 100 times less massive, are surprisingly active in star formation.
Using XMM-Newton's new data, astronomers have mapped the region around a supermassive black hole, estimating its mass at 3-5 million solar masses. The observations also reveal rapid spinning and accretion rates that verge on theoretical limits.
Astronomers are discovering that galaxies with actively forming stars have a bluish color, while those without do so appear red. The BAT Hard X-ray Survey of NASA's Swift spacecraft has found most nearby active galaxies to be spiral and irregular, with more than 30% being colliding.
Galaxies in crowded environments, like superclusters, experience violent lives due to high-speed collisions and stripping away of gas. The Hubble Space Telescope's Advanced Camera for Surveys mapped dark matter scaffolding, revealing dense clumps that match the location of old galaxies.
Researchers from the University of Granada and the Pierre Auger Collaboration have found a link between active galactic nuclei and high-energy cosmic rays. The study suggests that these galaxy centers are responsible for producing the most energetic particles in the Universe.
Astronomers are using supercomputers to study the energy levels of high-temperature atoms in space, which hold the key to understanding black holes. The new calculations reduce error rates by a few percent, providing more accurate data for X-ray telescope observations.
The Gemini Observatory has dedicated its second telescope, Gemini South, marking a decade of work by hundreds of people to build two advanced 8-meter instruments. Astronomers in the US and around the world now have access to unprecedented sky coverage.
The Hubble-X image reveals a nearly circular bright cloud at the core of a star-forming region in NGC 6822. The cloud contains thousands of newly formed stars and is many times brighter and larger than the Orion Nebula in our Milky Way galaxy.
Researchers from the University of Washington have discovered that Barnard's Galaxy, an irregular dwarf galaxy, is significantly different from the Milky Way. Using images taken by the Hubble Space Telescope, they found three star clusters within NGC 6822 to be of very different ages, with one cluster dating back 15 billion years.
Researchers at Ohio State University have found signs of a compact, supermassive object at the center of galaxy NGC 5548, suggesting the presence of a black hole. The study used data from the International Ultraviolet Explorer satellite and ground-based telescopes to analyze changes in light from the galaxy's active galactic nucleus.
A team of astronomers detected a population of distant, dusty galaxies forming stars at rates 10-100 times higher than most optical sources. The discovery suggests that much of the star formation in the distant Universe may be hidden to visual observations, requiring a combination of both optical and submillimeter observations.
Astronomers used an instrument to collect light from 1000 objects, discovering seven compact blue galaxies beyond 2 billion light years away