Beta Pictoris b: hide and seek, Pg II

Key Highlights:

• Astronomers have discovered a faint, elusive exoplanet, Beta Pictoris d, orbiting the young star Beta Pictoris.
• This gas giant is the dimmest planet ever directly imaged from Earth.
• Two independent teams detected the planet using the European Southern Observatory’s Very Large Telescope (VLT) in Chile and NASA’s James Webb Space Telescope (JWST).
• The discovery was published in The Astrophysical Journal Letters on July 15.

Detailed Insights:

• Beta Pictoris d is located 63 light-years from Earth in the southern constellation Pictor.
• The star system Beta Pictoris is relatively young, estimated to be around 20 to 23 million years old.
• The VLT team, led by researchers including Ben Sutlieff from the University of Edinburgh, directly imaged the planet and found it in archival data spanning over a decade.
• The JWST team, led by Aidan Gibbs from the University of California San Diego, identified the planet by detecting the unique chemical fingerprint of its atmosphere, a novel technique.
• Beta Pictoris d is approximately 2.4 times the mass of Jupiter and takes about 91 years to orbit its star.
• Its discovery makes Beta Pictoris only the second planetary system known to have more than two directly imaged planets.

Scientific/Technical Concepts Involved:

• Exoplanet: A planet located outside our Solar System, orbiting a star other than the Sun.
• Direct Imaging: A method of detecting exoplanets by directly observing their light, separate from their host star.
• Gas Giant: A large planet composed primarily of hydrogen and helium, with a small or non-existent rocky core.
• Light-year: A unit of astronomical distance equivalent to the distance that light travels in one year.
• Spectroscopy: The study of the interaction between matter and electromagnetic radiation, used to identify chemical composition.