Science, Space and Technology News 2024
A newly discovered exoplanet exhibits the most eccentric orbit observed to date, complete with a backward orbital path around its star. Insights from this Penn State-led study could advance our understanding of how hot Jupiters form and evolve. Credit: SciTechDaily.com’s strange elongated, backward orbit holds clues to the formation history and future trajectories of hot Jupiters.
To add to the unusual nature of the exoplanet’s orbit, the team also found that it’s orbiting backward, meaning in a direction opposite to the rotation of its host star. This is not something that astronomers see in most other exoplanets, nor in our own solar system, and it helps inform the team’s interpretation of the exoplanet’s formation history.
The team first utilized the NASA-funded NN-EXPLORE Exoplanet and Stellar Speckle Imager in a technique that helps to “freeze out” atmospheric twinkling, which showed that there were no extraneous stars nearby that could have confused the TESS measurements. Then, using the HPF and NEID spectrographs, the team observed how TIC 241249530’s spectrum, or wavelengths of its emitted light, shifted as a result of the exoplanet orbiting it.
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