Category Astronomy/Space

Astronomers make most Distant Detection yet of Fluorine in Star-Forming Galaxy

A new discovery is shedding light on how fluorine — an element found in our bones and teeth as fluoride — is forged in the Universe. Using the Atacama Large Millimeter/submillimeter Array (ALMA), in which the European Southern Observatory (ESO) is a partner, a team of astronomers have detected this element in a galaxy that is so far away its light has taken over 12 billion years to reach us. This is the first time fluorine has been spotted in such a distant star-forming galaxy.

A new discovery is shedding light on how fluorine – an element found in our bones and teeth as fluoride – is forged in the Universe...

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Creating Ultra-Diffuse Galaxies

Creating Ultra-Diffuse Galaxies | Center for Astrophysics
An optical image of the ultra-diffuse galaxy GMP 4348 in the Coma cluster of galaxies; the scale bar shows a distance of thirty-two thousand light-years. In a spectroscopic study of eleven such galaxies, astronomers have concluded that ram-stripping of gas led these galaxies to shut down star formation and expand, turning them into ultra-diffuse galaxies.

Ultra-diffuse galaxies (UDGs) have very low luminosities, comparatively few stars, and little star-formation activity as compared with normal galaxies of similar sizes...

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Gravitational ‘Kick’ may explain the Strange Shape at the Center of Andromeda

Click to enlarge: Graphic showing the orbit of stars around a supermassive black hole before, left, and after, right, a gravitational “kick.” (Credit: Steven Burrows/JILA)

When two galaxies collide, the supermassive black holes at their cores release a devastating gravitational “kick,” similar to the recoil from a shotgun. New research led by CU Boulder suggests that this kick may be so powerful it can knock millions of stars into wonky orbits.

The research, published Oct. 29 in The Astrophysical Journal Letters, helps solve a decades-old mystery surrounding a strangely-shaped cluster of stars at the heart of the Andromeda Galaxy. It might also help researchers better understand the process of how galaxies grow by feeding on each other.

“When scientists first looked at Andromeda,...

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ALMA scientists detect signs of Water in a Galaxy far, far away

Credit: ALMA (ESO/NAOJ/NRAO)/S. Dagnello (NRAO)

New study marks most distant detection of required element for life as we know it in a regular star-forming galaxy. Water has been detected in the most massive galaxy in the early Universe, according to new observations from the Atacama Large Millimeter/submillimeter Array (ALMA). Scientists studying SPT0311-58 found H20, along with carbon monoxide in the galaxy, which is located nearly 12.88 billion light years from Earth. Detection of these two molecules in abundance suggests that the molecular Universe was going strong shortly after the elements were forged in early stars...

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