New Giant Planet Discovered 271 Light-Years Away by Subaru Telescope & OASIS Project
- The search for planets beyond our solar system has entered a new phase with the Subaru Telescope in Hawai'i.
- This discovery is the result of the first success of the OASIS (Observing Accelerators with SCExAO Imaging Survey) project.
- One of the newly discovered objects is a planet designated HIP 54515 b, orbiting a star located 271 light-years away in the constellation Leo.
The search for planets beyond our solar system has entered a new phase with the Subaru Telescope in Hawai’i. Utilizing an advanced system, astronomers have successfully identified a giant planet through a study published in , in The Astronomical Journal.
This discovery is the result of the first success of the OASIS (Observing Accelerators with SCExAO Imaging Survey) project. OASIS combines space-based observational data with Subaru’s powerful imaging systems to detect elusive celestial objects.
A Giant Planet Relatively Close to Earth
One of the newly discovered objects is a planet designated HIP 54515 b, orbiting a star located light-years away in the constellation Leo. Astronomers estimate the planet has a mass nearly 18 times that of Jupiter and orbits its star at a distance comparable to Neptune’s orbit around our Sun.
The distance between the newly discovered planet and its star, and their proximity to Earth, is described as relatively close. The astronomers state Here’s akin to viewing a baseball from a distance of 100 kilometers.
“Thanks to the precision of the SCExAO system, astronomers were able to observe the planet clearly despite this challenge,” astronomers noted, as reported by ScienceDaily.
How OASIS Finds Hidden Objects
The OASIS project, led by Thayne Currie and Masayuki Kuzuhara, focuses on narrowing down the most promising targets for direct imaging. The survey analyzes data from two European Space Agency missions – Hipparcos and Gaia – which track the subtle movements of stars caused by the gravitational pull of unseen companion objects.
When a star exhibits signs of being tugged or wobbled, OASIS directs the Subaru Telescope towards that target. Astronomers then employ the Subaru Coronagraphic Extreme Adaptive Optics (SCExAO) system. This system captures extremely high-resolution images, allowing for the direct observation of the hidden object.
The SCExAO system is crucial because planets are vastly dimmer than their host stars, even when young and still radiating heat from their formation. Overcoming this brightness disparity is a major hurdle in exoplanet detection.
NASA’s upcoming Roman Space Telescope is scheduled to study planet HIP 71618 b. The Roman telescope’s advanced coronagraph will be tested for future missions aimed at directly imaging Earth-like planets around other stars. This makes the OASIS discoveries particularly valuable, providing a “perfect target” for testing the Roman telescope’s planet-hunting technology.
The success of OASIS demonstrates that the Subaru Telescope will continue to play a key role in astronomical discoveries, even as new generations of advanced telescopes come online. Only about 1 percent of stars are known to host massive planets or brown dwarfs that can be directly photographed with current telescopes, highlighting the significance of this breakthrough.
The discoveries also include a rare “failed star,” known as a brown dwarf, further showcasing the capabilities of the combined space-data and ground-based imaging approach.
The OASIS survey represents a significant advancement in the field of exoplanet research, moving beyond indirect detection methods – such as observing the wobble of a star – to directly imaging these distant worlds. This direct imaging capability is essential for characterizing the atmospheres and compositions of exoplanets, bringing us closer to understanding the potential for life beyond Earth.