All articles tagged with #galactic evolution
Astronomers using ALMA have discovered a galaxy cluster from just 1.4 billion years after the Big Bang that is unexpectedly hot, challenging current models of galaxy formation and suggesting that such structures may form more rapidly than previously thought.
The James Webb Space Telescope has provided new insights into the star-forming region Sagittarius B2 in the Milky Way, revealing that strong magnetic fields may hinder star formation despite the presence of dense gas and young stars, which could reshape our understanding of galactic evolution.
Astronomers discovered a massive molecular cloud in the Milky Way, weighing as much as 160,000 suns and located 23,000 light-years away, which could provide new insights into star formation and galaxy evolution.
Astronomers discovered a massive 200-light-year structure called the Midpoint cloud within the Milky Way, which is a Giant Molecular Cloud playing a key role in star formation and material flow into the galaxy's core, offering new insights into galactic dynamics and evolution.
The James Webb Space Telescope has discovered over a dozen dormant galaxies from the early universe, challenging previous assumptions about galaxy activity and suggesting that star formation can pause and resume in cycles, influenced by supermassive black holes and environmental factors, with future studies planned to explore these phenomena further.
Astronomers have discovered cold hydrogen clouds within the hot Fermi bubbles at the Milky Way's center, suggesting a more recent and violent black hole eruption than previously thought, which could reshape understanding of galactic activity and black hole cycles.
Astronomers have discovered a rare, ancient 'fossil galaxy' called KiDS J0842+0059, located 3 billion light-years away, which has remained largely unchanged for about 7 billion years, providing valuable insights into the early universe and galaxy formation. These relic galaxies are extremely rare, dense, and contain mostly ancient stars, offering a cosmic record of early galactic conditions.
New research suggests that very massive stars eject much more matter through powerful stellar winds than previously thought, influencing their evolution and the formation of black holes, and challenging existing models of star and black hole development.
The galaxy SDSS1335+0728 has been observed undergoing dramatic brightness changes due to the activation of its central supermassive black hole, providing a rare opportunity to study the transition to an active galactic nucleus. This event, first detected by the Zwicky Transient Facility, offers valuable insights into the behavior of black holes and their impact on host galaxies, enhancing our understanding of galactic evolution.
The James Webb Space Telescope has captured detailed images of the dwarf galaxy NGC 4449, revealing its intense star-forming activity and dusty structure. Located 12.5 million light-years away, NGC 4449 is undergoing a "starburst" due to gravitational interactions with neighboring galaxies, leading to the formation of numerous young star clusters. The combined data from JWST's NIRCam and MIRI instruments provide a comprehensive view of the galaxy's stellar and dusty components, offering insights into both past and future galactic evolution.
New findings from the James Webb Space Telescope reveal that early galaxies formed complex structures like bars much earlier than previously thought, suggesting accelerated and less chaotic galactic evolution. This challenges existing theories and indicates that galaxies matured faster in the early Universe.
Astronomers have discovered surprising variations in the magnetic field structures within the Milky Way's Sagittarius arm, challenging previous galactic models and offering new insights into the role of magnetic fields in star formation. Leveraging advanced telescopes and the Gaia satellite, the study reveals that these magnetic fields are more complex and influential than previously thought, with significant implications for the evolution of galaxies. The findings suggest that further mapping of galactic magnetic fields could provide a better understanding of the nature and development of the Milky Way and other galaxies.
The Hubble Space Telescope has captured stunning images of colliding galaxies UGC 05028 and UGC 05029, known as Arp 300, revealing their cosmic dance and potential for new star formation. The galaxies' merger processes and gravitational interactions are providing valuable insights into galactic evolution and the formation of supermassive black holes, shedding light on the dynamics that drive cosmic evolution.
NASA scientists have discovered X-ray activity in the nearby spiral galaxy NGC 4945, shedding light on the evolution of galaxies. The activity, which outlines giant clouds of cold gas, is believed to have resulted from a black hole eruption some 5 million years ago. This finding provides insight into the influence of supermassive black holes compared to the effects of star formation in galaxy evolution. The discovery was made possible through data collected by the ESA satellite XMM-Newton and NASA's Chandra X-ray Observatory.
NASA scientists at the Goddard Space Flight Center have discovered X-ray activity in the nearby spiral galaxy NGC 4945, shedding light on galactic evolution. The activity, believed to be a relic of a particle jet erupting from the galaxy's central supermassive black hole 5 million years ago, has pushed cold gas through the galaxy, possibly triggering a starburst event. The findings provide insight into the influence of black holes compared to star formation in galaxy evolution, and the observations were made using ESA's XMM-Newton observatory, which has helped uncover a galactic "fossil" that may be the first of many.