Articles tagged with Andromeda Galaxy
The Sloan Digital Sky Survey has released its 20th data set, featuring over three million spectra of stars and galaxies, as well as 18 new value-added catalogs. This release marks a significant expansion of the survey's efforts, integrating full all-sky panoptic spectroscopy across both hemispheres.
A recent study from Florida International University suggests that galaxy mergers are neither necessary nor sufficient to stop galaxies from forming new stars. Instead, slower internal processes are believed to play a much larger role in quenching star formation.
Ultra-faint dwarf galaxies, tiny satellite galaxies of the Milky Way, can reflect conditions of the early universe, shedding light on galaxy formation and dark matter. Simulations suggest these small galaxies are sensitive to early radiation environment and can probe the universe's earliest climate.
A new study using advanced computer simulations has shed light on the mysterious chemical history of the Milky Way. Researchers found that galaxies like the Milky Way can develop two distinct chemical sequences through various mechanisms, challenging previous assumptions about the role of cosmic gas flows and galaxy mergers.
Researchers found Andromeda XXXV, the smallest and dimmest satellite galaxy to date, which challenges our understanding of galaxy formation and evolution. The discovery provides new insights into how galaxies survive different epochs of the universe.
The study reveals a dynamic ecosystem with diverse dwarf galaxies, unlike the Milky Way's smaller satellite system. Hubble's observations provide insights into how small-galaxy growth is affected by massive galaxies like Andromeda.
The Hubble Space Telescope has captured a panoramic view of the Andromeda Galaxy, unveiling hundreds of millions of stars and providing new clues to its evolutionary history. The galaxy's unique structural features, such as coherent streams of stars, suggest a more active recent star formation and interaction history than the Milky Way.
The Hubble Space Telescope has completed a comprehensive survey of the Andromeda galaxy, revealing its structure and evolution on a holistic scale. The observations provide insights into the galaxy's age, heavy-element abundance, and stellar masses, helping astronomers distinguish between competing scenarios of merger history.
Edwin Hubble discovered a new universe by analyzing the brightness of stars, revealing that our galaxy is just one of billions in the universe. His findings showed that galaxies move away from each other at faster speeds with greater distances.
Researchers have found that studying the mass and movement of the Andromeda galaxy and the Milky Way could help place an upper limit on the value of dark energy. The technique may provide valuable insights into the mysterious force, but it is not yet a direct detection.
Researchers used the Dark Energy Spectroscopic Instrument to study the motions of nearly 7500 stars in the inner halo of the Andromeda Galaxy. They found telltale patterns that revealed how these stars began their lives as part of another galaxy, shedding light on galactic immigration events.
Researchers used the Panchromatic Hubble Andromeda Treasury Triangulum Extended Region — or PHATTER — survey to study the Triangulum galaxy. The team discovered two drastically different structures depending on the age of the stars, with younger and older stars having distinct distributions.
Scientists using ALMA discovered a rare instance of two supermassive black holes growing simultaneously near the center of a newly coalescing galaxy. This finding suggests that binary black hole pairs may be more common than previously thought, with potential implications for future gravitational wave detections.
Scientists have discovered a new, extremely faint galaxy named Pegasus V, located on the outskirts of Andromeda. The dwarf galaxy is believed to be one of the oldest in the universe, with its stars forming over 13 billion years ago.
A team of astronomers discovered an unusual ultra-faint dwarf galaxy, Pegasus V, on the outer edge of the Andromeda Galaxy using NSF's NOIRLab facilities. The galaxy appears to be extremely deficient in heavier elements, indicating it is very old and likely a fossil of the first galaxies.
Researchers studied over 500 stars in a region of Andromeda called the Northeast shelf, finding conclusive evidence of an ancient collision. The findings provide insights into how material from collisions shapes a galaxy's appearance and makeup.
Astronomers have found an intermediate-mass black hole in the Andromeda galaxy, one of only a few confirmed objects of its kind. The discovery sheds light on the formation of galaxies and provides insights into the population of black holes at the centers of low-mass galaxies.
Researchers create detailed map of Andromeda's disk, identifying region where new stars are born. The study sheds light on thermal and non-thermal emission components in the galaxy.
Using numerical simulations, researchers showed that satellite galaxies can retain gas and experience new episodes of star formation after passing close to their parent galaxy. This process is driven by the satellite's reserve of cold gas and minimum distance from its parent galaxy.
The LAMOST survey has identified 1534 low-α metal-rich member stars of the Gaia-Sausage-Enceladus galaxy, challenging previous understanding of the merging process. The newly discovered component extends from a previously detected metal-poor region and suggests that these stars were formed during subsequent evolution.
A team of scientists using NASA's Hubble Space Telescope has mapped the immense envelope of gas surrounding the Andromeda galaxy, our nearest large galactic neighbor. The study reveals a layered structure with two main shells of gas, and sheds light on the fuel for future star formation and outflows from supernovae.
A team of Clemson University researchers has detected a relativistic jet emerging from two colliding galaxies, providing the first photographic proof of this phenomenon. The discovery was made using advanced telescopes and offers insights into the formation of jets in galaxy collisions.
The telescope will image large areas of the sky 1,000 times faster than Hubble, surveying as much of the sky in near-infrared light -- in just as much detail -- as Hubble has over its entire three decades. WFIRST will provide a broad and detailed view of the sky to answer fundamental questions about the universe.
The James Webb Space Telescope will study dwarf galaxy companions to the Milky Way and Andromeda, gaining insights into galaxy formation and dark matter. By measuring star motions, researchers hope to determine if some galaxies are grouped in a flat plane, which would have significant implications for understanding their formation.
Researchers have discovered that the galaxy Andromeda has eaten several smaller galaxies over the last few billion years, leaving behind remnants in large streams of stars. The study found faint traces of even earlier consumed galaxies, possibly dating back to 10 billion years ago.
Astronomers have uncovered two historic events in the Andromeda Galaxy, with evidence suggesting major changes to its structure occurred a few billion years ago and much earlier. The findings provide insights into the evolution and formation of both the Andromeda Galaxy and our own Milky Way.
NGC 6052 is a pair of colliding galaxies visible in the Hercules constellation, consisting of two galaxies merging due to gravity. The Milky Way will undergo a similar collision with Andromeda in approximately 4 billion years.
Astronomers have created the first accurate 3D map of the Milky Way, revealing it is warped and twisted, with young stars in the outer regions.
A collision between the Milky Way and Large Magellanic Cloud is expected in 2 billion years, potentially waking up a dormant black hole. The event could eject the Solar System from the galaxy, although the impact on Earth is unlikely.
Researchers have observed two galaxy nuclei in close proximity to each other, providing a rare glimpse of supermassive black hole pairs. The study offers insights into the final stages of galaxy mergers and their role in shaping the evolution of massive black holes.
Research team observes pairs of supermassive black holes drawn together by merging galaxies, providing insights into the late stages of cosmic collisions. The study confirms that over 17% of nearby galaxies host a pair of black holes at their center.
Calculations by Masafumi Noguchi confirm two-stage formation of Milky Way stars, with iron-rich stars forming after a gap in star birth. This discovery sheds light on the galaxy's dramatic history and provides insights into its formation.
Researchers at the University of Michigan have found a massive galaxy, M32p, in Andromeda's outer stellar halo, shedding light on the evolution and survival of disk galaxies. This discovery helps explain the formation of Andromeda's enigmatic M32 satellite galaxy.
A new technique combines satellite galaxies' motions with computer simulations to estimate a galaxy's mass. The method yields more reliable results than previous methods, especially for large datasets generated by current and future surveys.
Researchers have discovered that the Milky Way and Andromeda galaxies are roughly the same size, with Andromeda being 800 billion times heavier than the Sun. This finding challenges previous estimates of dark matter in the Andromeda galaxy and suggests that scientists may need to revise their understanding of the local group.
A team of astronomers from the University of Basel has found that satellite galaxies around Centaurus A co-rotate within disc-shaped planes, a phenomenon that challenges the standard model of cosmology. This discovery suggests that these systems are not isolated cases but part of a widespread pattern.
An international team of astronomers has discovered a galactic arrangement where dwarf satellite galaxies orbit the main body in a narrow disk around Centaurus A. This finding contradicts commonly used cosmological models and simulations.
Researchers found that 14 out of 16 satellite galaxies of Centaurus A orbit in a single plane and rotate coherently. This synchronized movement contradicts standard cosmology simulations, suggesting flaws in current theories of galaxy formation.
A new international study has found a plane of dwarf galaxies orbiting around Centaurus A, challenging a long-held theory that these galaxies are spread out in all directions. The research reveals that spinning pancake-like systems of satellite galaxies are more common than previously thought.
A team of researchers used the Subaru Telescope to study Messier 77, revealing evidence of a hidden minor merger billions of years ago. The discovery provides crucial evidence for the minor merger origin of active galactic nuclei and sheds light on the mysterious phenomenon.
The Hubble Space Telescope has imaged two galaxies in close proximity, each traveling at approximately 2 million kilometers per hour. Their interaction will cause distortions and changes to the structures of both galaxies due to gravitational forces.
Astronomers have discovered a unique ultra-slow pulsar XB091D in the Andromeda galaxy, believed to have captured a companion only a million years ago. The pulsar's acceleration is linked to its interaction with an ordinary star, providing new insights into neutron star rejuvenation.
Fermi data reveals concentrated gamma rays at Andromeda's center, sparking speculation about dark matter. The unusual distribution may be caused by unknown sources or the presence of dark matter.
A new study confirms that galaxies are being pushed away from a previously unknown region of low density, called the Dipole Repeller. This region exerts a repelling force on our Local Group of galaxies, suggesting that push and pull forces are equally important.
Astrophysicist Hai Fu aims to study the late stages of merging galaxies and observe supermassive black holes' accretion using a large chunk of the night sky. The research project will use radio-emission maps and optical observations to confirm findings.
New research reveals that the Milky Way's black hole can create hundreds of planet-mass objects, which are then flung throughout the galaxy. These objects, known as 'spitballs,' could be detected by future telescopes and may pose a challenge to distinguish from free-floating planets.
Researchers have created a 3D map of interstellar dust reddening across three-quarters of the visible sky using data from almost one billion stars. This map reveals the structure and history of our galaxy, including the distribution of dust in the disk and the presence of ghostly trails indicating collisions with other galaxies.
Astronomers have found a similar percentage of newborn stars with specific masses in young clusters of the Andromeda galaxy compared to our own. This study, utilizing Hubble images and citizen scientist contributions, helps interpret distant galaxy light and understand star formation history.
Astronomers using the Subaru Telescope's Hyper Suprime-Cam camera observed deep, super-wide-field images of the galaxies and their populations of young stars. The team discovered that the spatial distribution of young stars around these galaxies follows closely that of their distribution of neutral hydrogen.
A study of over 20,000 merging galaxies found that when two galaxies collide, the larger one can stop the smaller one from forming new stars. However, when two galaxies of similar mass collide, they both increase their stellar birth rate.
The study reveals a helically-twisted loop of magnetic field coiled around the galaxy's main spiral arm, affecting gas flow and star production. The discovery helps explain how galactic spiral arms are formed, resolving major questions about galaxy evolution.
The detection of a supermassive black hole at the center of Messier 32, a satellite of the Andromeda Galaxy, reveals a 'quiescent' black hole with activity among the weakest yet found. The VLA's improved sensitivity allowed for the detection of radio emission from the black hole, which is roughly 90 times fainter than previous studies.
A 3D map of galaxy superclusters has been created, providing insights into dark matter and its distribution in the universe. The map, published online in Monthly Notices of the Royal Astronomical Society, spans nearly two billion light years.
Researchers found nearly 200 compact elliptical galaxies, including 11 isolated ones, which were formed when a massive galaxy stripped away the core of a smaller one. These galaxies can escape their host clusters due to gravitational perturbations, helping them survive for about a billion years.
A study of Andromeda's stellar disk reveals a more disordered population than the Milky Way's, suggesting recent mergers with smaller galaxies. The researchers found that younger stars have relatively ordered rotational motion, while older stars display much more disordered motion.
The Hubble Space Telescope has captured the sharpest large composite image of the Andromeda galaxy, revealing over 100 million stars in a 61,000-light-year-long stretch. This panoramic view provides unprecedented insights into the galaxy's structure and evolution.
Researchers calculated the precise mass of the Milky Way and Andromeda galaxies, finding that Andromeda is about twice as heavy. The study also measured the expansion of the universe by observing satellite galaxies' motion, confirming cosmic expansion near our local group.
Scientists have precisely measured the mass of the Milky Way for the first time, finding it to be approximately half the weight of Andromeda. The study, led by the University of Edinburgh, used data on galaxy distances and velocities to calculate the total masses of both galaxies.
An international team of researchers devises precise method for calculating galaxy masses using gravity and expansion data. The new study shows the Milky Way has only half the mass of its neighbor Andromeda.
Astronomers discover that small galaxies orbit in orderly disc-shaped orbits, contradicting computer models. The phenomenon is observed in about 50% of galaxies, sparking a reevaluation of dark matter's nature and the laws of physics.