An Extrasolar World Covered in Water?

Artistic rendition of the exoplanet TOI-1452 b, a small planet that may be entirely covered in a deep ocean.

An international team of researchers led by Charles Cadieux, a Ph.D. student at the Université de Montréal and member of the Institute for Research on Exoplanets (iREx), has announced the discovery of TOI-1452 b, an exoplanet orbiting one of two small stars in a binary system located in the Draco constellation about 100 light-years from Earth.

The exoplanet is slightly greater in size and mass than Earth and is located at a distance from its star where its temperature would be neither too hot nor too cold for liquid water to exist on its surface. The astronomers believe it could be an “ocean planet,” a planet completely covered by a thick layer of water, similar to some of Jupiter’s and Saturn’s moons.

In an article published today in The Astronomical Journal, Cadieux and his ...

Read More

Comet Impacts Formed Continents when Solar System Entered Arms of Milky Way

New Curtin research has found evidence that Earth’s early continents resulted from being hit by comets as our Solar System passed into and out of the spiral arms of the Milky Way Galaxy, turning traditional thinking about our planet’s formation on its head.

The new research, published in Geology, challenges the existing theory that Earth’s crust was solely formed by processes inside our planet, casting a new light on the formative history of Earth and our place in the cosmos.

Lead researcher Professor Chris Kirkland, from the Timescales of Mineral Systems Group within Curtin’s School of Earth and Planetary Sciences, said studying minerals in the Earth’s crust revealed a rhythm of crust production every 200 million years or so that matched our Solar System’s transit through areas...

Read More

Surprising Culprit Worsens Stroke, TBI damage

In the aftermath of a stroke or traumatic brain injury (TBI), a group of amino acids that typically support brain function contribute significantly to the brain destruction that can follow both these injuries, scientists report.

The new study provides for the first time the surprising evidence that four common nonexcitatory amino acids that usually make proteins which are essential to brain function, instead cause irreversible, destructive swelling of both the astrocytes that support neurons and the neurons themselves, says Dr. Sergei Kirov, neuroscientist in the Department of Neuroscience and Regenerative Medicine at the Medical College of Georgia.

“There are many ways to kill neurons...

Read More

Antiferromagnetic Hybrids achieve important Functionality for Spintronic Applications

Antiferromagnetic hybrids achieve important functionality for spintronic applications
(a) Cross-sectional transmission electron micrograph of the m-plane Al2O3/Cr2O3 interface with the c-axis [0001]-oriented out of the page and (b,c) the corresponding diffractograms of Cr2O3 and Al2O3 indicating epitaxial order. (d) Sample geometry. The magnetic field is applied parallel to the c-axis. (e) Spin Seebeck (SSE) voltage of the Cr2O3/Pt sample shows a sign change across the SF transition. (f) SSE signals dominated by left-hand (LH) and quasiferromagnetic (QFM) magnons fall rapidly with increasing temperature. Credit: Rodolfo Rodriguez et al, Physical Review Research (2022). DOI: 10.1103/PhysRevResearch.4.033139

Antiferromagnets have zero net magnetization and are insensitive to external magnetic field perturbations...

Read More