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How large are neutron stars?

An interdisciplinary research team has identified new, narrower limits on the radii of neutron stars. The team determined the radius of a typical neutron star to be close to 11 kilometers.

Dec 30th, 2020

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How nearby galaxies form their stars

The star-formation activity of typical, nearby galaxies is found to scale proportionally with the amount of gas present in these galaxies. This points to the net gas supply from cosmic distances as the main driver of galactic star formation.

Dec 22nd, 2020

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Looking for dark matter near neutron stars with radio telescopes

The targets of this search were two nearby neutron stars known to have strong magnetic fields, as well as the Milky Way's center, which is estimated to host half a billion neutron stars. Since no signal was seen, the team was able to impose the strongest limits to date on axion dark matter particles of a few micro electron-volt mass.

Dec 21st, 2020

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On the hunt for a missing giant black hole

Despite searching with the Chandra X-ray Observatory and Hubble Space Telescope, astronomers have no evidence that a distant black hole estimated to weigh between 3 billion and 100 billion times the mass of the sun is anywhere to be found. This missing black hole should be in the enormous galaxy in the center of the galaxy cluster Abell 2261, which is located about 2.7 billion light-years from Earth.

Dec 18th, 2020

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Astronomers detect possible radio emission from exoplanet

By monitoring the cosmos with a radio telescope array, an international team of scientists has detected radio bursts emanating from the constellation Booetes. The signal could be the first radio emission collected from a planet beyond our solar system.

Dec 16th, 2020

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A pair of lonely planet-like objects born like stars

Astronomers discovered an exotic binary system composed of two young planet-like objects, orbiting around each other from a very large distance. Although these objects look like giant exoplanets, they formed in the same way as stars, proving that the mechanisms driving star formation can produce rogue worlds in unusual systems deprived of a Sun.

Dec 16th, 2020

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No longer 'faster than permitted by our galaxy'...

Physicists have resolved a long-lasting discrepancy between the measured velocities of interstellar oxygen atoms and other elements in our galaxy: a difference of 380 km/s, which astrophysical measurements of X-ray absorption by oxygen atoms gave, had given astrophysicists a headache.

Dec 14th, 2020

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Can pizza help address the dark matter mystery?

Researchers developed a novel multiple-cell cavity design, dubbed 'pizza cavity'. Just like pizzas are cut into several slices, multiple partitions vertically divide the cavity volume into identical pieces (cells). With almost no volume to be lost, this multiple-cell haloscope enables the meaningful output of high-frequency region scanning.

Dec 11th, 2020

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