Hubble spots young gas giant forming in an 'intense and violent' way

[Admin]

The Hubble Space Telescope has spotted a young Jupiter-like protoplanet that’s supporting an unusual planetary formation theory, according to a new study.

Hubble spots young gas giant forming in an 'intense and violent' way : Read more

 

[rod]

Some notes from me after digging more into this exoplanet report.

Hubble finds a protoplanet that could upend planet formation models

NASA's Hubble Space Telescope has directly photographed evidence of a Jupiter-like protoplanet forming through what researchers describe as an "intense and violent process." This discovery supports a long-debated theory for how planets like Jupiter form, called "disk instability."

phys.org

Reference paper, Images of embedded Jovian planet formation at a wide separation around AB Aurigae, https://www.nature.com/articles/s41550-022-01634-x, 04-April-2022.

NASA ADS Abstract paper, https://ui.adsabs.harvard.edu/abs/2022arXiv220400633C/abstract, April 2022. The 51-page PDF link at NASA site, https://arxiv.org/ftp/arxiv/papers/2204/2204.00633.pdf

My observation. http://exoplanet.eu/catalog/ab_aur_b/ using these properties I calculate P = 5.8632E+02 years or 2.1415E+05 days. In 1 Gyr period, 1.7056E+06 revolutions completed around the host star (but listed as 2 Myr old so considered very young). The 9 Mjup exoplanet = 2.8604E+03 or 2860 earth masses. Using the MMSN for 2.4 solar mass star, postulated primordial disk mass = 7.991028E+03 or close to 8,000 earth masses. I did not find a specific protoplanetary disk mass size presented in the 51-page report, https://arxiv.org/ftp/arxiv/papers/2204/2204.00633.pdf
My note, "Table 1| System Properties" shows mass estimates for this postulated exoplanet range 9 Jupiter mass up to near 130 Jupiter mass or some 41,000 earth mass or possibly larger. AB Aur star is reported to show a massive disk in other reports and as the paper states, "Optical to near infrared (IR) scattered light imaging of its massive protoplanetary disk reveals numerous spiral arms on 200--500 au scales32-34". My note. This link reports gas mass in some areas of AB Aur estimated at 4.2E-4 Msun so total gas and disk mass could be 1.398360E+04 earth masses, https://arxiv.org/pdf/1906.11638.pdf

Trying to pin down how many stars are documented now with disks and what their disk masses are is difficult. Unlike the NASA exoplanet site and exoplanet.eu site, these sites show we have less than 3800 stars documented with confirmed exoplanets now. That is easy to show, documenting all the stars claimed with disks used to support exoplanet evolution from spinning disks is harder. It seems the reports are scatter shot all over I also see the same stars reported on over, and over again.