PSU news by
Penn State's student blog



Penn State Researcher Leads Effort In Gravitational Wave Discovery

The Laser Interferometer Gravitational-Wave Observatory (LIGO) announced that it detected gravitational waves directly for the first time on February 11, proving Albert Einstein’s Theory of General Relativity formulated 100 years earlier. Penn State alumnus Dr. Chad Hanna is a 12-year member of the LIGO Scientific Collaboration, and currently serves as a co-leader for one of LIGO’s four astrophysics groups.

“There are four astrophysics working groups,” Dr. Hanna said. “One of those working groups is the group that searches for compact binary systems.” Hanna continued, “It has somewhere between 150 and 200 people who are currently members, and I am currently one of the co-leaders of that group.”

Although the Theory of General Relativity as it relates to gravitational waves is a complicated phenomenon, Hanna explained the concepts thoroughly. “The idea is that in general relativity, what we know of as gravity, is actually caused by space-time itself curving and warping due to the presence of matter and energy…Whenever you have something massive like a planet, it’s bending space around it.”

Based on this theory, LIGO wanted to detect the changes in space-time from a system billions of light years away, but small size of the change LIGO would need to observe made this detection difficult. “A change in distance between the two arms caused by these gravitational waves is [1×10^21],” Hanna said.

In a new field like directly detecting gravitational waves, it’s nearly impossible to imagine what advancements and progress may be made over the next few decades. Hanna emphasized his excitement about continuing these experiments and improving upon the research in the future, especially while serving in a leadership role within LIGO. “For me personally, I’m looking forward to spending the next 30 years or so in this field,” Hanna said.

While only time will tell where Hanna ends up within LIGO in the next 30 years, it would be hard to replicate the shock and excitement he said he encountered after the announcement of the discovery. “I was pretty shocked, I would say. I had been waiting for 12 years, and my colleagues had been waiting longer. When it happened, it was almost a little hard to believe just because we had spent so much time waiting.”

Even with the initial thrill of the discovery, Hanna said the team had to remain composed in order to properly proceed with the analysis of the data. “We had to impede our excitement because even though we made the detection in September 2015, we didn’t make the announcement until February,” Hanna said. “We spent the next couple months trying to curb our enthusiasm and make sure to do all of the analysis as carefully as possible.”

The official announcement to the world on February 11 was a pinnacle of every LIGO researcher’s career. “It really will open a new window up to the universe,” Hanna said of his excitement for future discoveries. “We’ll understand the universe from a completely different perspective.”

As this field continues to grow and more research develops from observing these gravitational waves, researchers like Hanna hope to continue to expose different ways of seeing the universe. “The way to think of this is a little bit like astronomy now,” Hanna described. “We’re not using telescopes to look at the sky, we’re using these gravitational wave antennas to kind of listen to the sky.”

About the Author

Matt Coleman

Matt Coleman is a writer for Onward State. His hometown is North Huntingdon, Pennsylvania, a little under an hour from Pittsburgh. He is a sophomore majoring in Natural Resource Engineering in Biological Engineering. Please e-mail questions and comments to [email protected] Also, follow him on Twitter @cole_man2.



Incoming Penn State Track & Field Athlete Kristian Marche Shot To Death In Philadelphia

The incident surrounding Marche’s death is “under investigation,” according to the Philadelphia police department.

Former Women’s Gymnastics Coach Files Lawsuit Against Penn State Over Handling Of Abuse Allegations

Men’s Soccer Trio, Reading United Win PDL Eastern Conference Title, Fall Short Of National Championship

Penn State Hockey’s Evan Barratt, Aarne Talvitie Participate In World Junior Summer Showcase

Ally McHugh Wins 400 Medley National Championship

Student Life

Nike Releases New Penn State Sneakers

This year’s sneaker is available to purchase online for $109.99.

Penn State Parking Office Runs Into Student Permit Purchase Issues

Girirajan Lab Seeks To Bridge The Gap Between Fly And Human Genomes

Plans Submitted For New KFC In State College

Developers have submitted preliminary land development plans to build a new KFC restaurant at 1780 S. Atherton St. in State College.

Join Onward State: Fall 2018 Application

Onward State is hiring for the fall semester and we’d love to have you join us.

Fall Move-In Traffic & Construction Changes

When 40,000 students need to move back to State College over the course of four days or so, things are bound to get crazy.

Be the first to know

  • Top posts and the best Penn State stories

Thank you for subscribing.

Something went wrong.

Assessing Penn State’s Front Seven Following Tuesday’s Medical Retirements

Penn State’s defensive line rotation will be shaken up following Ryan Buchholz’s medical retirement from football, while the coaching staff is letting the linebackers duel it out during camp.

Send this to a friend