UA-113443594-1

Mergers drive a powerful dusty quasar

A galaxy merger provided the raw materials to form a bright and powerful dust-obscured quasar in the early Universe, according to a new imaging analysis. This analysis, which focused on the most luminous galaxy known, also reveals how very luminous galaxies may simultaneously feed the super-massive black holes at their center, and also obscure them with dust. The most luminous galaxies in the early Universe…

Dark matter on the move

Scientists have found evidence that dark matter can be heated up and moved around, as a result of star formation in galaxies. The findings provide the first observational evidence for the effect known as 'dark matter heating', and give new clues as to what makes up dark matter. The research is published today in the journal Monthly Notices of the Royal Astronomical Society. In the…

Astronomers discover the giant that shaped the early days of our...

Some ten billion years ago, the Milky Way merged with a large galaxy. The stars from this partner, named Gaia-Enceladus, make up most of the Milky Way's halo and also shaped its thick disk, giving it its inflated form. A description of this mega-merger, discovered by an international team led by University of Groningen astronomer Amina Helmi, is now published in the scientific journal Nature.…

Merging neutron stars

IMAGE: Simulation of merging neutron stars calculated with supercomputers. Different colors show the mass density and the temperature some time after the merger has taken place and shortly before the object... view more  Credit: Copyright: C. Breu, L. Rezzolla The option to measure the gravitational waves of two merging neutron stars has offered the chance to answer some of the fundamental questions about the structure of…

Miniature gravitational-wave detector to be built at Northwestern

IMAGE: Infographic depicts the full landscape of gravitational wave-causing events and the sensors capable of detecting them. view more  Credit: Northwestern University A team of physicists and astronomers from Northwestern University is poised to lead gravitational-wave astronomy into its next evolution. The W. M. Keck Foundation has awarded $1 million, which will be used to develop a prototype for a new kind of gravitational-wave detector that…

How massive can neutron stars be?

(Goethe University Frankfurt) Since their discovery in the 1960s, scientists have sought to answer an important question: How massive can neutron stars actually become? By contrast to black holes, these stars cannot gain in mass arbitrarily; past a certain limit there is no physical force in nature that can counter their enormous gravitational force. For the first time, astrophysicists at Goethe University Frankfurt have succeeded in calculating a strict upper limit for the maximum mass of neutron stars.

Six decades of cosmology

"Cosmologists are often wrong but never in doubt," Russian physicist Lev Landau once said. In the early days, astronomers began by observing and modelling stars in different stages of evolution and comparing their findings with theoretical predictions. Stellar modelling uses well-tested physics, with concepts such as hydrostatic equilibrium, law of gravitation, thermodynamics, nuclear reactions etc. Yet in contrast, cosmology is based on a large number…

NASA’s close up of Hurricane Rosa shows hint of an eye

IMAGE: On Sept. 26, 2018 at 4:30 p.m. EDT (1630 UTC), the MODIS instrument aboard NASA's Terra satellite captured a visible image of Hurricane Rosa. view more  Credit: NASA Worldview, Earth Observing System Data and Information System (EOSDIS) On Sept. 26 at 4:30 p.m. EDT (1630 UTC), the MODIS instrument aboard NASA's Terra satellite captured a visible image of Hurricane Rosa. Credit: NASA Worldview, Earth Observing…

UTA physicist studying how extreme weather in space affects satellites

A physicist at The University of Texas at Arlington is developing a new scale to measure weather storms in space that could lead to a better understanding of how those storms impact Earth. "We want to see how that electrical current created during space weather episodes transfers and affects space and the Earth," said Ramon Lopez, UTA professor of physics. "We know it affects satellites,…

Physicists constrain dark matter

IMAGE: This image of Centaurus A, one of the closest active galaxies to Earth, combines the data from observations in multiple frequency ranges. view more  Credit: ESO/WFI (optical), MPIfR/ESO/APEX/A. Weiss et al. (submillimeter), NASA/CXC/CfA/R. Kraft et al. (X-ray) Researchers from Russia, Finland, and the U.S. have put a constraint on the theoretical model of dark matter particles by analyzing data from astronomical observations of active galactic…
- Advertisement -

LATEST NEWS

MUST READ