Ever since neutron stars were discovered, researchers have been using their unusual properties to probe our universe. The superdense remnants of stellar explosions, neutron stars pack a mass greater than the Sun’s into a ball about as wide as San Francisco. A single cup of this star matter would weigh about as much as Mount Everest.

These odd celestial bodies could alert us to distant disturbances in the fabric of spacetime, teach us about the formation of elements, and unlock the secrets of how gravity and particle physics work in some of the most extreme conditions in the universe.

Both cold gases and neutron matter in some parts of a neutron star are superfluids – the particles flow without any friction. When a superfluid rotates, little whirlpools, or vortices, develop. How exactly these vortices move and interact with one another and other structures inside a rotating neutron star is still an open question. “It’s probably not this nice, regular lattice of vortices,” says Michael McNeil Forbes, who studies theoretical physics at Washington State University in Pullman. “It might be some tangle of vortices that’s in the entire star. We don’t know.”

Forbes and others suspect that the glitches they observe in the rotation of pulsars have something to do with how these vortices get “pinned” to structures in the star. Generally, a single vortex meanders freely around a fluid. But when the fluid contains a rigidly packed area of matter that obstructs the vortex’s motion, the vortex will stop and sometimes even wrap its swirling arms around the rigid object and position itself so that its centre is right on top of it.

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Scientific American

Two assistant professors in the Washington State University Department of Physics and Astronomy have been named Women of Distinction by the Girl Scouts of Eastern Washington and Northern Idaho.

The award was presented to Vivienne Baldassare and Anya Guy for their work contributing to the region through their professional endeavors, commitment to their community, and willingness to lead. The Girl Scouts of Eastern Washington and Northern Idaho spans 29 counties covering 65,000 square miles, serving over 3,000 girls.

Before joining WSU faculty in 2020, Baldassare was a NASA Einstein Postdoctoral Fellow at the Department of Astronomy at Yale University, where she led the discovery of what was then the smallest known super black hole.

Guy implements research-based instructional practices in undergraduate physics at WSU. She completed resident studies at Lawrence Berkeley National Laboratory.

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WSU Insider

The bachelor of science in physics degree is among nine Washington State University bachelor’s-degree programs from five colleges recognized for outstanding assessment of student learning that helped guide changes to undergraduate curriculum or instruction.

The programs were announced Nov. 8 at the Fall 2022 Celebration of Assessment Excellence. Hosts of the event were the Office of the Provost and Executive Vice President, the Division of Academic Engagement and Student Achievement, and the Office of Assessment for Curriculum Effectiveness (ACE).

“Assessment of student learning is one of the ways we can fortify WSU’s strengths and position as a top research and land-grant university,” said Bill Davis, interim vice provost for academic engagement and student achievement. “It can provide vital evidence and data to guide programmatic evaluation and evolution to better meet the current and future needs of our students, our disciplines, and our state.”

Led by faculty assessment coordinator Michael Allen, the physics department examined students’ ability to think independently and critically in acquiring, reproducing, and assessing information from a variety of sources. It evaluated research poster presentations in the senior-thesis course and found that students need to improve communication of research information from various sources. Based on this, faculty introduced a new prerequisite course where students create a thesis proposal to better prepare them to present their research in the course.

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Scientists at WSU’s Institute for Shock Physics discovered something unexpected when they tested humankind’s most valuable metals to see how much pressure they could take.

It turns out platinum is the only precious metal that retains its atomic structure when subjected to the kind of pressure found at the center of planet Earth, holding up better than gold.

“No one really expected this. We thought that gold was stable forever, but it turns out it changes into a different related crystal structure under enough shock wave pressure,” said Yogendra Gupta, director of the Institute for Shock Physics at WSU. “So basically, if you want a material that will never change no matter what then store platinum.”

It’s this kind of intellectual curiosity and commitment to scientific discovery that has helped bring international acclaim to WSU’s Shock Physics research. And it demonstrates the unique capabilities of the Chicago-based Dynamic Compression Sector (DCS), a facility designed and built by WSU that enabled the experiments to be conducted.

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