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This story was originally published by NASA and is unaltered.
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Hubble Finds Surprises Around a Star That Erupted 40 Years Ago [1]

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Date: 2024-06

The 2021 ultraviolet data from Hubble showed a strong emission line of highly ionized magnesium that was not present in earlier published spectra from 1990. Its presence shows that the estimated temperature of the white dwarf and accretion disk increased from less than 400,000 degrees Fahrenheit in 1989 to greater than 450,000 degrees Fahrenheit now. The highly ionized magnesium line is one of many seen in the UV spectrum, which analyzed together will reveal the energetics of the system, and how it has changed in the last three decades.

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[1] Url: https://science.nasa.gov/missions/hubble/hubble-finds-surprises-around-a-star-that-erupted-40-years-ago/

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