The instruments that search for these products of dark matter annihilation were conceived as telescopes or detectors to look at particles and photons
emitted by galaxies and the exotic objects that lie within them.
That dip was caused by blobs of hot plasma
emitted by the galaxy's black hole, which were magnified by a cluster of stars acting as a cosmic lens between Earth and the galaxy, researchers suggest.
Yet the total light
emitted by the galaxies of Eridanus A is only twice that of the Milky Way.
The vast volume of space probed by such a galaxy survey will provide a measure of the relationship between the amount of mass and the amount of radiation
emitted by galaxies throughout the Universe.
Not exact matches
A Giant Galactic Ghost Intrigued
by faint blurs on old photographic plates of the Virgo
galaxy cluster, a nearby region teeming with
galaxies, Oregon's Bothun and colleagues wondered if the apparitions might be smallish
galaxies with «low surface brightness» — astronomer - speak for
emitting less light per unit area than typical
galaxies.
Light from the
galaxy is absorbed
by the dust,
emitted as infrared, and stretched to radio wavelengths as the universe expands.
Astronomers studying distant
galaxies powered
by monster black holes have uncovered an unexpected link between two very different wavelengths of the light they
emit, the mid-infrared and gamma rays.
Measuring the atomic hydrogen signal
emitted by distant
galaxies is one of the main scientific drivers behind the billion dollar Square Kilometre Array (SKA) project, for which technology demonstrators like the Australian SKA Pathfinder are under construction.
An international team of scientists has pushed the limits of radio astronomy to detect a faint signal
emitted by hydrogen gas in a
galaxy more than five billion light years away — almost double the previous record.
Using the world's largest radio telescope, two astronomers from Swinburne University of Technology in Australia have detected the faint signal
emitted by atomic hydrogen gas in
galaxies three billion light years from Earth, breaking the previous record distance
by 500 million light years.
«Not only did we detect radio signals
emitted by distant
galaxies when the Universe was three billion years younger, but their gas reservoirs turned out to be unexpectedly large, about 10 times larger than the mass of hydrogen in our Milky Way.
The glow came from radiation
emitted by an actively feeding black hole in the
galaxy.
Instead of searching for the light from individual
galaxies with an optical telescope, the team stalked a different quarry, red - shifted radio waves
emitted by hydrogen atoms floating in huge clouds within the
galaxies.
When you see Jupiter shining in the night sky, for example, you're looking about an hour back in time, whereas the light from distant
galaxies captured
by telescopes today was
emitted millions of years ago.
The objects causing these low - frequency ripples — such as orbiting supermassive black holes at the centers of distant
galaxies — would be different from the higher frequency ripples,
emitted by collisions of much smaller black holes, that have so far been detected on Earth.
The CIB glow is more irregular than can be explained
by distant unresolved
galaxies, and this excess structure is thought to be light
emitted when the universe was less than a billion years old.
By studying the distribution of the x-ray
emitting gas and the individual
galaxies in the cluster, the team also concluded that El Gordo is actually two clusters in collision.
El Gordo consists of two clusters in collision, as revealed
by the two separate swarms of individual
galaxies (red) and the asymmetric cloud of hot, x-ray
emitting gas (blue) in between.
It will pick up the dim, highly reddened light
emitted by the first stars in the universe and answer fundamental questions about
galaxy formation, alien planets, and the geometry of the cosmos.
This is a subtle variant of weak gravitational lensing, in which the light
emitted from distant
galaxies is slightly warped
by the gravitational effect of large amounts of matter, such as
galaxy clusters.
But the maps» main feature is a long swath of gamma rays
emitted by the disc of our Milky Way
galaxy.
By studying far - flung
galaxy clusters, astronomers are able to look back in time at the state of those objects millions or even billions of years ago, when the light just now reaching us was
emitted.
By comparing differences in the X-ray spectra between Type I and Type II
galaxies, the researchers concluded that, regardless of which way the
galaxy faces Earth, the central black holes in Type I
galaxies consume matter and
emit energy much faster compared with the black holes at the center of Type II
galaxies.
To conduct the study, Mushotzky and his colleagues re-examined data from 836 active
galaxies detected
by NASA's Swift Burst Alert Telescope that strongly
emit high - energy, or «hard,» X-rays — the same X-rays that medical technicians use to visualize the human skeleton.
«While this
galaxy is forming stars at a rate hundreds of times faster than our Milky Way
galaxy, the sharp vision of Hubble revealed that the majority of the
galaxy's starlight is being
emitted by a region with a diameter just a few percent that of the Milky Way,» said Geach.
The telescope will also be able to register the radio waves
emitted by water masers, clouds of water molecules that
emit microwave radiation, in the discs of
galaxies.
With ALMA, the astronomers were finally able to observe the natural millimeter - wavelength «glow»
emitted by ionized carbon in the dense and dusty star - forming regions of the
galaxies.
It is a Seyfert
galaxy that is dominated
by something known as an Active Galactic Nucleus — its core is thought to contain a supermassive black hole that is
emitting huge amounts of radiation, pouring energetic X-rays out into the universe.
The top candidates, the astronomers suggested, are a neutron star, possibly a highly - magnetic magnetar, surrounded
by either material ejected
by a supernova explosion or material ejected
by a resulting pulsar, or an active nucleus in the
galaxy, with radio emission coming from jets of material
emitted from the region surrounding a supermassive black hole.
Another idea floating around is that FRBs are
emitted by active galactic nuclei, or AGNs — superluminous regions at the centers of some
galaxies.
In this case, the researchers looked for distortions to light being
emitted by background
galaxies caused
by foreground dark matter filaments.
In addition, because the atoms
emit at a very specific wavelength, the scientists could detect the
galaxy's rotation
by tuning the telescopes» radio receivers to receive radio waves whose length has been changed
by Doppler shifting.
Some believe they are explosions in distant
galaxies, or flares caused
by distant magnetars, highly magnetic pulsars that
emit bursts of powerful radiation.
«We saw number of spectral features
emitted by ionized atoms in the
galaxies such as hydrogen, oxygen, and neon, which allowed us to determine the metal content of the
galaxies.»
A research team led
by Bunyo Hatsukade, a postdoc researcher, and Kouji Ohta, a professor, both from the Graduate School of Science, Kyoto University, revealed that approximately 80 % of the unidentifiable millimeter wave signals from the universe is actually
emitted from
galaxies, based on the observations with ALMA (Atacama Large Millimeter / submillimeter Array).
MAUNAKEA, Hawaii — A group of researchers, led
by a University of California, Riverside graduate student, observed distant
galaxies with the MOSFIRE high - resolution near - infrared spectrometer at W. M. Keck Observatory and their results will help to build the foundations of
galaxy evolution studies
by predicting the star - formation rate of distant
galaxies from the light they
emit.
Light that is
emitted or reflected
by objects takes time to travel, and the vast distances it must cross to reach us from the farthest parts of the universe means that we see the most distant
galaxies as they were billions of years ago.
The best way to fully understand the properties of
galaxies is
by studying them at a broad range of wavelengths; as each type of light is
emitted from a different actor in a
galaxy.
The VLA can image the gas in such
galaxies because it is particularly sensitive to the radio waves naturally
emitted by hydrogen atoms.
Most X-rays are
emitted by pockets of hot gases found between
galaxies and near black holes.
But today it seems like black holes - given how much energy they
emit - can actually be important for modulating
galaxy assembly,
by regulating star formation and generating hot gas reservoirs.
Two American astrophysicists studied the color of the light
emitted by 200,000
galaxies and created a cosmic spectrum, which they then averaged according to the light spectrum visible to human eyes.
The eight computer generated photo - paintings located in the lower level of the gallery are a reflection of the invisible energy surrounding nature and inspired
by drawings Mori made in front of the ocean back in her native Japan.The photo - paintings
emitted a cosmic and atmospheric aura that made me feel as if I was transported into a distant serene
galaxy.