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Black holes have a significant impact on the evolution of galaxies

Black holes have a significant impact on the evolution of galaxies

Space
UC Riverside astronomers find large-scale winds associated with active black holes in small galaxies suppress star formation.
This illustration envisions the Milky Way galaxy's gas recycling above and below its stellar disk. Hubble observes the invisible gas clouds rising and falling with its sensitive Cosmic Origins Spectrograph (COS) instrument. The spectroscopic signature of the light from background quasars shining through the clouds gives information about their motion. Quasar light is redshifted in clouds shooting up and away from the galactic plane, while quasar light passing through gas falling back down appears blueshifted. This differentiation allows Hubble to conduct an accurate audit of the outflowing and inflowing gas in the Milky Way's busy halo — revealing an unexpected and so-far unexplained surplus of inflowing gas. Credits: NASA, ESA and D. Player (STScI)

An unexplained surplus of gas flowing into our home galaxy

Space
The new gas could be coming from the intergalactic medium.
A zoom into the shared disk: this observation of ALMA shows that the proto-binary system [BHB2007] 11 is surrounded by dust filaments, where the southern (brighter) young star accretes more material. Credit: MPE

How two suns collect matter in a binary system?

Space
Food for young twin stars.
A simulation of early galaxy formation under three dark matter scenarios. In a universe filled with cold dark matter, early galaxies would first form in bright halos (far left). If dark matter is instead warm, galaxies would form first in long, tail-like filaments (center). Fuzzy dark matter would produce similar filaments, though striated (far right), like the strings of a harp.

This is how a fuzzy universe may have looked

Space
Scientists simulate early galaxy formation in a universe of dark matter that is ultralight, or “fuzzy,” rather than cold or warm.
Positions of galaxies within the protocluster

Scientists discovered a new protocluster in the process of forming hundreds of galaxies

Space
In the present universe, full-formed galaxy clusters contain thousands of member galaxies including tens of massive galaxies. These clusters are the largest astronomical objects...
Credit: X-ray: NASA/CXC/George Mason Univ./R. Pfeifle et al.; Optical: SDSS & NASA/STScI

Three black holes on a collision course

Space
Astronomers have spotted three giant black holes within a titanic collision of three galaxies.
This illustration demonstrates the two ways that blue stragglers in star clusters form. The illustration on the left shows the collision model where two low-mass stars in an overcrowded environment experience a head-on collision, combining their fuel and mass to form a single hot star. The illustration on the right depicts the "vampire" model consisting of a pair of stars that undergo a transformation, with the lower-mass star draining its larger-mass companion of the hydrogen that fuels its rebirth. Credit: NASA/ESA

Hubble Explores the Formation and Evolution of Star Clusters in the Large Magellanic Cloud

Space
Just as people of the same age can vary greatly in appearance and shape, so do collections of stars or stellar aggregates. New observations...
This artist's illustration shows an alien world that is losing magnesium and iron gas from its atmosphere. The observations represent the first time that so-called "heavy metals"—elements more massive than hydrogen and helium—have been detected escaping from a hot Jupiter, a large gaseous exoplanet orbiting very close to its star.The planet, known as WASP-121b, orbits a star brighter and hotter than the Sun. The planet is so dangerously close to its star that its upper atmosphere reaches a blazing 4,600 degrees Fahrenheit, about 10 times greater than any known planetary atmosphere. A torrent of ultraviolet light from the host star is heating the planet's upper atmosphere, which is causing the magnesium and iron gas to escape into space. Observations by Hubble's Space Telescope Imaging Spectrograph have detected the spectral signatures of magnesium and iron far away from the planet.The planet's "hugging" distance from the star means that it is on the verge of being ripped apart by the star's gravitational tidal forces. The powerful gravitational forces have altered the planet's shape so that it appears more football shaped.The WASP-121 system is about 900 light-years from Earth. Credits: NASA, ESA, and J. Olmsted (STScI)

Hubble uncovers a heavy metal exoplanet shaped like a football

Space
Observations by NASA's Hubble Space Telescope reveal magnesium and iron gas streaming from the heavy metal exoplanet known as WASP-121b.
This image shows an irregular galaxy named IC 10, a member of the Local Group — a collection of over 50 galaxies in our cosmic neighborhood that includes the Milky Way.

Hubble captures elusive, irregular galaxy

Space
Recently Hubble captured an image of an irregular galaxy named IC 10, a losest-known starburst galaxy. The galaxy is experiencing a furious bout of...
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