Giant exoplanet found, imaged directly thanks to star-mapping data (photos)

[Admin]

Astronomers have directly detected and imaged a gas giant orbiting another star by combining different techniques for hunting exoplanets.

Giant exoplanet found, imaged directly thanks to star-mapping data (photos) : Read more

 

[rod]

I read these reports on the giant, imaged exoplanet using astrometry too.

New exoplanet discovered, https://www.sciencedaily.com/releases/2023/04/230413154452.htm

My note. Apparently there is some disc around the parent star. "Its host star is surrounded by icy debris left over from planet formation, similar to our solar system's Kuiper belt, the ring of icy objects observed around the Sun." "The star is surrounded by a luminous cold, Kuiper belt-like debris disk on > 150 au scales. See Supplemental
Material for more details."

Ref - Direct imaging and astrometric detection of a gas giant planet orbiting an accelerating star, https://www.science.org/doi/10.1126/science.abo6192, 13-April-2023.

Direct Imaging and Astrometric Discovery of a Superjovian Planet Orbiting an Accelerating Star, https://arxiv.org/abs/2212.00034

My note. The exoplanet is superjovian and is about 5.1169E+03 earth masses or 5116.9 earth masses. The host star is about 1.85 solar masses. Applying the MMSN to 1.85 solar mass star, the postulated protoplanetary disc mass (total) ~ 6.159751E+03 earth masses. We could speculate the original protoplanetary disc mass was much larger than this to explain the origin of 16.1 Mjup exoplanet at about 17 au.

 

[rod]

Because this report is about another exoplanet find, this may be interesting for some. the exoplanet.eu site is updated again

http://exoplanet.eu/, 5363 confirmed exoplanets listed. I looked at the temperature calculated and temperature measured for the exoplanets shown in Kelvin degrees.

1179 show temperature calculated, mean = 1024.97 K, min = 110 K, max = 3921 K and standard deviation = 563.99 K.

63 show temperature measured. mean = 1649 K, min = 84 K, max = 3631 K, and standard deviation = 810 K. It seems for the vast majority of exoplanets; little is known about their actual surface temperatures or atmospheres.