SPHERE spots that forms giant planets around young star. The SPHERE Instrument on ESO’s Very Large Telescope (VLT) captured the most detailed image of the 5-million-year-old SU Aur protoplanetary system.
This image from the SPHERE instrument on ESO’s Very Large Telescope shows a protoplanetary disk around SU Aur. SU Aur is located about 517 light years distant in the constellation of Mandal.
Also known as HD 282624, HIC 22925, and BD + 30 743, the star is a member of the Taurus-Auriga star-forming region. The SU is much smaller and more massive than the Sun and is known for a huge circumstantial protoplanetary disk.
THE NEW IMAGE OF THE SPEREE TOOL IN VLT SHOWS THE DISC IN UNPRECEDENTED DETAIL, INCLUDING LONG DUST MARKS.
ESO astronomers said: SU and himself are obscured by the instrument’s coronagraph, which allows the light from the central star to have less bright features around it.
THE DUST TRAILS ARE MADE OF MATERIAL FROM A NEBULA FLOWING INTO THE DISK.
This nebula is possibly the result of a collision between the star and a huge cloud of gas and dust, resulting in the unique shape of the disk that makes up the planet and the surrounding dust structure.
The astronomers found that the nebula is still feeding material that makes up the SU and the planet’s disk. Our observations suggest that SU and has been undergoing late material violations.
Which may explain the observed disk structures, he said.
The most obvious observations of this mechanism in SU and his work are exemplary and demonstrate that late accretion events can still occur in the second-level phase, significantly affecting the development of circumstellar discs.
Interrupting the frequency of such events with additional observations will help determine whether this process is responsible for the misalignment of the spin orbit in developed exoplanet systems.
The findings were published in Astrophysical Journal Letters.
Alma sees gaseous spiral arms around the young cowboy star. Astronomers using the Atacama Large Millimeter / Submillimeter Array (ALMA) have discovered a huge set of spiral arms around the young variable star Ru Lupi.
The spiral structure, made up of carbon monoxide gas, extends from the star to about 1000 AU (astronomical units), from a compact dust disk to about 60 AU.
THIS IMAGE OF ALMA SHOWS THE DISK THAT THE PLANET FORMS AROUND THE YOUNG STAR RU LUPI.
The inset image (lower left, red disk) shows DSHARP observations with dust disk rings and gaps hinting at the presence of planetary formations.
THE NEW OBSERVATION SHOWS A LARGE SPIRAL STRUCTURE (BLUE) COMPOSED OF GAS, WHICH IS FAR FROM THE COMPACT DISK OF DUST.
The inset image (lower left, red disk) shows DSHARP observations with dust disk rings and gaps hinting at the presence of planetary formations. This image of Alma shows the disk that the planet forms around the young star Ru Lupi.
The new observation shows a large spiral structure (blue) composed of gas, which is far from the compact dust disk. RU Lupi, also known as RU Lup, HD 142560 and HIC 78094, is approximately 400 light-years distant in the constellation Lupus.
The star has 0.7 times the mass of the Sun and 1.6 times the radius of the Sun and is surrounded by a protoplanetary disk. Previous observations of stars with ALMA, which were part of the disk substructure in the High Angular Resolution Project (DSHARP).
Signs of planetary formation in progress, indicated by dust gaps on the disk. But we also noticed some weak carbon monoxide structures, which came from the disk, Drs. Said Jane Huang.
An astronomer at the Center for Astrophysics at Harvard and the Smithsonian. That is why we decided to inspect the disk around the star again, this time focusing on gas instead of dust.
Protoplanetary disks contain much more gas than dust. While dust is needed to accumulate planetary cores, gas forms its atmosphere.
In recent years, high-resolution observations of dust formations have revolutionized our understanding of planet formation.
However, the new ALMA image of gas around Ru lupi indicates that the current view of planet formation is still very simple and may be more chaotic than previously known images of neat rings.
Dr. Huang said, The fact that we found this spiral structure in the gas after long observation is that we probably didn’t see all the diversity and complexity of the planet-forming atmosphere.
We may have lost a lot of gas structures in other disks. Dr. Huang and her colleagues have suggested various scenarios that could possibly explain why spiral arms appear around Ru Lupi.
THE DISK MAY HAVE BEEN COLLAPSING UNDER ITS OWN GRAVITY, AS IT IS ON A MUCH LARGER SCALE. OR MAYBE RU LUPI IS IN TALKS WITH ANOTHER STAR.
Another possibility is that the disk interacts with its environment, assembling interstellar material with spiral arms. None of these scenarios fully explain what we have observed, said Dr. Sean Andrews.
Also of the Harvard & Smithsonian Center for Astrophysics. There may be unknown processes that occur during the formation of the planet that we have not yet included in our model.
We will only know what they are if we find other records that look like Ru Lupi. The team’s article was published in the Astrophysical Journal.