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Ph.D. student gets a look into her future as part of astronomical experiment team

Audrey Dunn spent more than three months at Kitt Peak National Observatory

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A group of six people posing in front of an observatory structure, with a large metal cylinder and equipment behind them.

Audrey Dunn

Audrey Dunn, third from left, poses in front of a cryostat before it is lifted into a telescope. The onsite team includes, left to right, Ian Lowe (University of Arizona), Kenny Lau (CalTech), Dunn, Victoria Butler (Cornell), Dongwoo Chung (Cornell), and Evan Meyer (University of Arizona).

When she was little, astrophysical sciences and technology Ph.D. student Audrey Dunn felt that astronomy was the only place she could ask questions that were unanswered.

That curiosity led her down her current academic path where she recently spent more than three months at Kitt Peak National Observatory in Arizona as part of a group of astronomers studying the early universe.

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A large radio telescope dish inside an open observatory dome, illuminated by red lighting against a dark night sky.

Audrey Dunn

The 12-meter telescope at Kitt Peak National Observatory lit up at night.

Dunn is part of the Tomographic Ionized Carbon Mapping Experiment (TIME), a project that is studying the early universe by mapping the emission of ionized carbon from distant galaxies.

“We are very curious about what the universe looked like at a specific time period,” explained Dunn. “We can’t observe hydrogen directly so we use carbon as a proxy measurement for it.”

In Arizona, Dunn and the team focused on getting detectors working properly on the telescope. These detectors, called TES bolometers, work best at extremely cold temperatures, which allow for the infrared light and data to be collected. The experience working with scientists around the country was a unique experience for Dunn.

“It was really fun,” she said. “I’m still young in my career, and even though I may not have expert knowledge, I brought a fresh set of eyes to this experiment. It was cool to interact with people and see what my future could look like.”

Dunn is now analyzing data from TIME, trying to get the atmosphere out of it so researchers have a pure science signal. In other words, clouds of material sometimes pass over the line of sight of the telescope, and that interference needs to be cleaned from the data so astronomers know exactly what they are observing. That work will formulate her thesis under the direction of her adviser, Michael Zemcov, professor in the School of Physics and Astronomy.

Her innate curiosity has brought her from her hometown of Las Vegas to Rochester, N.Y., to galaxies light-years away.

“I love working in a lab, and I love working hands on, getting nitty gritty with data,” said Dunn. “I’ve been really lucky to find a place here at RIT that lets me explore that and push down the path of all these interests that I have and do all these wonderful, wonderful things.”

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