Breakthrough in Observing Protoplanetary Disk Rotation Around Star AB Aurigae
Astronomers Make "Live" Observation of a Nearby Protoplanetary Disk's Rotation

Image: Universe Today
Astronomers from France's CNRS and University of Bordeaux have observed the rotation of a protoplanetary disk around the young star AB Aurigae. Using the SPHERE instrument on the Very Large Telescope in Chile, they identified anomalies in the disk's motion, likely due to forming planets, enhancing understanding of planetary formation.
- 01The protoplanetary disk around AB Aurigae exhibits unexpected rotational anomalies, hinting at the presence of forming planets.
- 02The SPHERE instrument, installed on the Very Large Telescope in Chile, allowed for detailed tracking of the disk's rotation.
- 03AB Aurigae b, a developing gas giant, is located 93 astronomical units from its host star and is approximately 9 times the mass of Jupiter.
- 04Observations revealed bright regions indicative of accretion zones, where material is gathering to form new planets.
- 05The study opens new avenues for understanding the dynamics of protoplanetary disks and the processes involved in planetary formation.
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A team of astronomers from France's National Center for Scientific Research (CNRS) and the University of Bordeaux has made significant progress in understanding protoplanetary disks by directly observing the rotation of the disk surrounding the young star AB Aurigae. Utilizing the SPHERE instrument on the European Southern Observatory's Very Large Telescope in Chile, the researchers detected unexpected rotational anomalies within the disk, likely caused by the presence of developing planets. AB Aurigae, a pre-main-sequence variable star approximately 4 to 5 million years old, hosts at least one confirmed gas giant, AB Aurigae b, which is about 93 astronomical units away and has a mass around 9 times that of Jupiter. The observations also identified various regions within the disk that suggest potential sites for additional planetary formation. These findings challenge existing theoretical models of disk dynamics and open new pathways for research into the birth and evolution of planetary systems.
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