Articles tagged with Andromeda Galaxy
Recent study finds satellite dwarf galaxies in the Milky Way and Andromeda do not behave as predicted by the standard model of galaxy formation. The galaxies are instead found in huge disks, moving in the same direction, like planets in our solar system. This mismatch raises concerns about the accuracy of the standard model of cosmology.
Astronomer Marshall McCall reveals the Milky Way and Andromeda are part of a larger 'Council of Giants', with 12 large galaxies arranged in a ring. The arrangement may have helped build the disks of these galaxies through gas flow.
Researchers from the Niels Bohr Institute detected a stream of stars in Andromeda II, revealing a remnant of a merged dwarf galaxy. The findings provide insight into the rare event of low-mass galaxy mergers, which are expected during galaxy formation.
Researchers used Modified Newtonian Dynamics (MOND) to predict velocity dispersion in faint dwarf galaxies of Andromeda. In 16 out of 17 cases, their predictions matched the measured velocity dispersions, suggesting that MOND may be a viable alternative to dark matter.
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.
A team of astronomers discovered a 'missing link' of black holes in the Andromeda galaxy, shedding light on bright X-ray sources and ultraluminous X-ray sources (ULXs). The findings confirm that these ULXs are normal, everyday black holes with masses around ten times that of the Sun.
Researchers used Earth-orbiting X-ray telescopes to observe a bingeing black hole that expels powerful beams of material, solving the debate over whether ULXs are black holes gorging themselves or more massive ones eating sedately. The discovery provides key insights into how jets are produced by a binging black hole.
The eXtreme Deep Field (XDF) image is a small fraction of the angular diameter of the full moon, containing about 5,500 galaxies. The XDF reveals galaxies that span back 13.2 billion years in time, providing a 'time tunnel into the distant past' and shedding light on the early universe's dramatic birth and evolution.
The chance alignment of galaxies NGC 3314A and NGC 3314B shows a unique view of their spiral arms and dust lanes. The motion of the galaxies indicates they are not on a collision course, with NGC 3314A's warped shape likely due to an encounter with another nearby galaxy.
Recent studies with the Green Bank Telescope indicate that two neighbor galaxies may have had a close encounter. The discovery confirms a disputed finding from 2004 and shows six dense clumps of gas in the stream, strengthening the argument that they are part of a bridge between the two galaxies.
The Milky Way is destined for a head-on collision with the Andromeda galaxy in 4 billion years. Computer simulations show that stars will be thrown into different orbits around the new galactic center, and our solar system may be tossed farther from the core.
The Hubble Space Telescope has created the sharpest visible-light image ever made of the nucleus of an external galaxy, the Andromeda galaxy. The blue stars surrounding the massive black hole are just 200 million years old and formed in a burst of star formation near the black hole.
Researchers discover that a dwarf galaxy may have created the Milky Way's spiral arms through a collision with our galaxy. Astronomer Curtis Struck cautions that these collisions can have significant effects on galaxy growth and evolution.
Astronomers have created an atlas of galactic 'train wrecks' to understand the collision process and form, growth, and evolution of galaxies. The study combines data from Spitzer Space Telescope and Galaxy Evolution Explorer to analyze areas where stars are forming rapidly.
Researchers have discovered a thick stellar disc in the Andromeda galaxy, composed of older stars with distinct chemical and orbital properties. This finding sheds light on the formation and evolution of spiral galaxies like our own Milky Way.
The Andromeda Galaxy's supermassive black hole, M31*, is surprisingly quiet and faint in X-ray light, deviating from expectations. A decade-long study by Chandra reveals that the black hole underwent a significant outburst of X-rays in 2006.
A team of researchers discovered that a supermassive black hole at the center of the most massive local galaxy, M87, is displaced from its expected location. The finding suggests that supermassive black holes may be commonly offset from their host galaxy centers due to previous mergers or interactions with jets.
Researchers found that the supermassive black hole at the center of M87 is displaced from its expected position, likely due to a previous merger or the iconic jet's push. This discovery could have significant implications for understanding galaxy formation and evolution.
The Swift satellite has acquired the highest-resolution view of the Andromeda Galaxy in ultraviolet light, capturing over 20,000 ultraviolet sources. The galaxy's star-formation processes can now be studied in greater detail than previously possible with the help of three ultraviolet filters.
Astronomers, including Queen's University physicist Larry Widrow, have discovered a nearby cosmic encounter between the Andromeda and Triangulum galaxies, which collided about two to three billion years ago. The collision caused millions of stars to be ripped from the Triangulum disk, forming a faint stream visible in the PAndAS data.
The Milky Way galaxy is rotating about 100,000 miles per hour faster than previously understood, increasing its mass by 50 percent. This increase in speed and mass brings the Milky Way closer to colliding with the Andromeda Galaxy or smaller nearby galaxies.
The Triangulum Galaxy, located 2.9 million light-years from Earth, is ablaze with starbirth, according to a new image taken by NASA's Swift satellite. The image showcases the galaxy's high spatial resolution, revealing young, hot stars and star-forming gas clouds in unprecedented detail.
Astronomers have witnessed the rare sight of four galaxies crashing into each other, kicking up billions of stars and forming a single, massive galaxy. The merger, observed using NASA's Spitzer Space Telescope and WIYN Telescope, provides unprecedented insight into how the most massive galaxies in the universe form.
Computer simulations show that supermassive black hole (SMBH) triple interactions occur frequently, even in the present-day universe. These violent encounters can lead to SMBH binaries being kicked out of galaxies and wandering through space.
Astronomers have discovered an enormous halo of red giant stars surrounding the Andromeda galaxy, extending beyond its visible disk and indicating that it may be five times larger than previously believed. The discovery is based on observations of over 500,000 light-years of starry space using advanced telescopes.
Researchers have discovered young, massive stars in ultra-luminous infrared galaxies, surrounded by delicate crystalline silicates called Forsterite. This finding provides new insights into the formation and evolution of these violent cosmic environments.
Cornell researchers study NGC 5291 system to understand tidal dwarf galaxies' properties. They find strong organic compound emission and warm molecular hydrogen in tidal dwarfs.
Researchers used ESO's Very Large Telescope to identify four massive elliptical galaxies at a redshift of 1.6-1.9, dating back to around 3,500 million years ago. These galaxies have ages between 1,000 and 2,000 million years and masses in excess of one hundred thousand million solar masses.
Astrophysicists have found a solution to the long-standing problem of dwarf galaxies in supercomputer simulations, validating the cold dark matter theory. The new simulations suggest that small dwarf galaxies could have been more massive in the past and formed stars before being consumed by larger galaxies.
Astronomers have observed features of nearby galaxy M33 using infrared pictures from NASA's Spitzer Space Telescope, revealing details hidden to the human eye. The galaxy is a gigantic laboratory where dust is created in novae and supernovae, being distributed in giant star winds and reborn in new stars.
The XMM-Newton satellite has discovered a faint X-ray glow from a very hot gas in the disk of the Andromeda Galaxy, suggesting recent star formation. Additionally, the team detected an accreting X-ray pulsar, a strongly magnetized neutron star drawing in material from its neighbor.
Astronomers have identified a vivid scar in the Centaurus A Galaxy, composed of clusters of young blue stars formed after the galaxy absorbed a smaller satellite galaxy 200 million to 400 million years ago. The discovery suggests absorption of smaller galaxies may contribute to galactic halo formation.
Astronomers have detected X-ray radiation from the Milky Way’s center for over two decades, but the origin remained a mystery due to poor resolution. The new image reveals individual X-ray sources and hot gas, leading scientists to conclude that most high-energy radiation comes from white dwarf stars, neutron stars, and black holes.
Researchers have found evidence of an extreme warp in the stellar disk of the Andromeda Galaxy, which may be the most extreme case of a warped spiral galaxy. The findings suggest that interactions between Andromeda and its satellite galaxies could be responsible for the warp.
A team of scientists used Chandra to observe the Andromeda Galaxy and found a supermassive black hole with a surprisingly cool gas funneling into it. The temperature of this gas is only several million degrees, unlike other X-ray sources in the galaxy that reach millions of degrees.
Astronomers have obtained the clearest view yet of the center of the Andromeda galaxy, revealing a double nucleus that has long puzzled scientists. The study uses new Hubble images to map the orbital motions of stars around the black hole at the galaxy's core.