Archive for the ‘physics’ category: Page 9

Jan 6, 2024

Metal-organic frameworks study unravels mechanism for capturing water from air

Posted by in categories: chemistry, physics, sustainability

Researchers from the Helmholtz-Zentrum Dresden-Rossendorf and Dresden University of Technology have unraveled the water adsorption mechanism in certain microporous materials—so-called hierarchical metal-organic frameworks (MOFs)—while probing them on the atomic scale.

Discovered only about 25 years ago, their special properties quickly led to a reputation as “miracle materials”—which, as it turned out, can even harvest water from air. The researchers describe how the material achieves this in ACS Applied Materials & Interfaces.

“These very special materials are highly porous solids made of metals or metal-oxygen clusters which are connected in a modular way by pillars of organic chemicals. This 3D arrangement leads to networks of cavities reminiscent of the pores of a kitchen sponge. It is precisely these cavities that we are interested in,” says Dr. Ahmed Attallah of HZDR´s Institute of Radiation Physics.

Jan 5, 2024

Magnetic Mystique: A Deeper Look at Massive Star Systems

Posted by in categories: cosmology, evolution, physics

A new study reveals that magnetic fields are common in star systems with large blue stars, challenging prior beliefs and providing insights into the evolution and explosive nature of these massive stars.

Astronomers from the Leibniz Institute for Astrophysics Potsdam (AIP), the European Southern Observatory (ESO), and the MIT Kavli Institute and Department of Physics have discovered that magnetic fields in multiple star systems with at least one giant, hot blue star, are much more common than previously thought by scientists. The results significantly improve the understanding of massive stars and their role as progenitors of supernova explosions.

Characteristics of O-type Stars.

Jan 5, 2024

Unlocking Alien Tech: Oxygen’s Crucial Role in Extraterrestrial Civilizations

Posted by in categories: alien life, physics

University of Rochester astrophysicist Adam Frank explores the links between atmospheric oxygen and detecting extraterrestrial technology on distant planets.

In the quest to understand the potential for life beyond Earth, researchers are widening their search to encompass not only biological markers, but also technological ones. While astrobiologists have long recognized the importance of oxygen for life as we know it, oxygen could also be a key to unlocking advanced technology on a planetary scale.

In a new study published in Nature Astronomy, Adam Frank, the Helen F. and Fred H. Gowen Professor of Physics and Astronomy at the University of Rochester and the author of The Little Book of Aliens (Harper, 2023), and Amedeo Balbi, an associate professor of astronomy and astrophysics at the University of Roma Tor Vergata, Italy, outline the links between atmospheric oxygen and the potential rise of advanced technology on distant planets.

Jan 3, 2024

Spacetime ripples detected in 2023 continue to puzzle astronomers. Could they be from the dawn of the universe?

Posted by in categories: physics, space

The recently detected gravitational waves are a muddled mix of various sources, new study finds.

Dec 31, 2023

BREAKING: The Physics Nobel Prize Winner Of 2022 Just Proved That The “Universe Is Actually Not Real”

Posted by in categories: physics, space

The fact that the universe is not locally real is one of the more disquieting discoveries of the last half-century.

Dec 31, 2023

Research Charts Stellar Birthplaces in the Whirlpool Galaxy for the first time

Posted by in categories: physics, space

An international research team led by the Max Planck Institute for Astronomy (MPIA) and involving the University of Bonn has mapped the cold, dense gas of future star nurseries in one of our neighboring galaxies with an unprecedented degree of detail. The data will enable the researchers for the first time to mount an in-depth study of the conditions that exist within the gas during the early stages of star formation outside the Milky Way at the scale of individual star-forming regions.

Their findings have now been published in Astronomy & Astrophysics.

Paradoxically, hot stars begin to form in some of the coldest regions of the universe, specifically in thick clouds of gas and dust that straddle entire galaxies. “To investigate the early phases of star formation, where gas gradually condenses to eventually produce stars, we must first identify these regions,” says Sophia Stuber, a doctoral student at the MPIA in Heidelberg and the first author of the research paper.

Dec 30, 2023

02 Karl Friston —The physics of sentience

Posted by in categories: biological, neuroscience, physics

UCLA Department of Integrative Biology and PhysiologyLuskin Endowment forLeadership SymposiumPushing the Boundaries: Neuroscience, Cognition, and LifeKarl Fris…

Dec 30, 2023

Scientists Propose New Explanation for “Impossible” Gamma-Ray Burst

Posted by in categories: cosmology, evolution, physics

In 2022, scientists from Northwestern University presented novel observational data indicating that long gamma-ray bursts (GRBs) might originate from the collision of a neutron star with another dense celestial body, such as another neutron star or a black hole — a finding that was previously believed to be impossible.

Now, another Northwestern team offers a potential explanation for what generated the unprecedented and incredibly luminous burst of light.

Continue reading “Scientists Propose New Explanation for ‘Impossible’ Gamma-Ray Burst” »

Dec 29, 2023

The Boundary Between Black Holes & Neutron Stars

Posted by in categories: cosmology, physics

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Dec 29, 2023

Astronomers inspect a peculiar nuclear transient

Posted by in categories: chemistry, cosmology, physics

An international team of astronomers has employed a set of space telescopes to observe a peculiar nuclear transient known as AT 2019avd. Results of the observational campaign, presented in a paper published December 21 on the pre-print server arXiv, deliver important insights into the properties and behavior of this transient.

Nuclear astrophysics is key to understanding supernova explosions, and in particular the synthesis of the chemical elements that evolved after the Big Bang. Therefore, detecting and investigating nuclear transient events could be essential in order to advance our knowledge in this field.

At a redshift of 0.028, AT 2019avd is a peculiar nuclear transient discovered by the Zwicky Transient Facility (ZTF) in 2009. The transient has been detected in various wavelengths, from radio to soft X-rays, and has recently exhibited two continuous flaring episodes with different profiles, spanning over two years.

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