Scientists Observe Gas Re-accretion in Dying Galaxies for the First Time

A new study from scientists using the Atacama Large Millimeter/submillimeter Array (ALMA) suggests that previously displaced gases can re-accrete onto galaxies, potentially slowing down the process of galaxy death caused by ram pressure stripping, and creating unique structures more resistant to its effects.

Científicos observan por primera vez reacreción de gas en galaxias moribundas

Un nuevo estudio realizado con datos del Atacama Large Millimeter/submillimeter Array (ALMA) postula que nubes de gas previamente desplazadas pueden volver a acumularse y formar nuevas galaxias mediante acreción, ralentizando de esa forma el proceso de despojo por presión que causa la extinción de las galaxias y creando estructuras únicas más resistentes a dicho fenómeno.

No olviden el surco: científicos usan masa estelar para establecer vínculo entre exoplanetas y discos protoplanetarios

A partir de los datos de más de 500 estrellas jóvenes observadas con el Atacama Large Millimeter/Submillimeter Array (ALMA), los científicos descubrieron un vínculo directo entre las estructuras de los discos protoplanetarios (los discos que rodean a las estrellas y donde se forman planetas nuevos) y las características demográficas de los planetas que allí nacen.

Mind the Gap: Scientists Use Stellar Mass to Link Exoplanets to Planet-Forming Disks

Data from 500 young stars observed with the Atacama Large Millimeter/submilliter Array (ALMA) is giving scientists a window back through time, allowing them to predict what exoplanetary systems looked like through each stage of their formation. And it all starts with a link between higher mass stars, disks with gaps in them, and a high occurrence of observed exoplanets.

Study of Young Chaotic Star System Reveals Planet Formation Secrets

A team of scientists using the Atacama Large Millimeter/submillimeter Array (ALMA) to study the young star Elias 2-27 have confirmed that gravitational instabilities play a key role in planet formation, and have for the first time directly measured the mass of protoplanetary disks using gas velocity data, potentially unlocking one of the mysteries of planet formation.

Cosmic cartographers map the nearby Universe revealing the diversity of star-forming galaxies

A team of astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) has completed the first census of molecular clouds in the nearby Universe. The study produced the first images of nearby galaxies with the same sharpness and quality as optical imaging and revealed that stellar nurseries do not all look and act the same. In fact, they’re as diverse as the people, homes, neighborhoods, and regions that make up our own world.

Record-breaking stellar flare from nearby star recorded in multiple wavelengths for the first time

Scientists using the Atacama Large Millimeter/submillimeter Array (ALMA) observed a record-breaking stellar flare from Proxima Centauri. The study also marks the first time that a powerful stellar flare, other than those from the Sun, has been observed with such complete wavelength coverage.

ALMA Discovers Misaligned Rings in Planet-Forming Disk Around Triple Stars

Using the Atacama Large Millimeter/submillimeter Array (ALMA), two teams of astronomers have for the first time discovered a planet-forming disk with misaligned rings around a triple star system, called GW Orionis. The astronomers give two possible scenarios for the misalignment: either…

ALMA Discovers Massive Rotating Disk in Early Universe

In our 13.8 billion-year-old universe, most galaxies like our Milky Way form gradually, reaching their large mass relatively late. But a new discovery made with the Atacama Large Millimeter/submillimeter Array (ALMA) of a massive rotating disk galaxy, seen when the universe was only ten percent of its current age, challenges the traditional models of galaxy formation. This research appears on 20 May 2020 in the journal Nature.

ALMA Reveals Unusual Composition of Interstellar Comet 2I/Borisov

A galactic visitor entered our solar system last year – interstellar comet 2I/Borisov. When astronomers pointed the Atacama Large Millimeter/submillimeter Array (ALMA) toward the comet on 15 and 16 December 2019, for the first time they directly observed the chemicals stored inside an object from a planetary system other than our own. This research is published online on 20 April 2020 in the journal Nature Astronomy.

NRAO’s Central Development Laboratory: Making the Invisible Visible

Nestled among the hills of the University of Virginia campus are a couple of nondescript buildings. They are home to NRAO’s Central Development Laboratory (CDL). The buildings are easy to overlook, just as it is easy to overlook the work done by CDL. We see photographs of the radio dishes at Atacama Large Millimeter/submillimeter Array (ALMA) and the Very Large Array (VLA) under a starry sky, and the beautifully rendered scientific images they produce. But between these two extremes is a complex set of processes that transform the faint radio signals of distant space into usable scientific data. Achieving that transformation effectively is one of CDLs most important jobs.

Going Against the Flow Around a Supermassive Black Hole

At the center of a galaxy called NGC 1068, a supermassive black hole hides within a thick doughnut-shaped cloud of dust and gas. When astronomers used the Atacama Large Millimeter/submillimeter Array (ALMA)
to study this cloud in more detail, they made an unexpected discovery that could explain why supermassive black holes grew so rapidly in the early Universe.

“Thanks to the spectacular resolution of ALMA, we measured the movement of gas in the inner orbits around the black hole,” explains Violette Impellizzeri of the National Radio Astronomy Observatory (NRAO), working at ALMA in Chile and lead author on a paper published in the Astrophysical Journal. “Surprisingly, we found two disks of gas rotating in opposite directions.”