GQ Lupi b (Exoplanet, Brown dwarf, Sub-brown dwarf)

GQ Lupi b (Exoplanet, Brown dwarf, Sub-brown dwarf)

📫𝐎𝐮𝐫 𝐅𝐁 𝐏𝐚𝐠𝐞:
https://www.facebook.com/ScienceWorld-106933907791981

🎬𝐈𝐦𝐚𝐠𝐞𝐬, 𝐚𝐧𝐢𝐦𝐚𝐭𝐢𝐨𝐧𝐬 𝐚𝐧𝐝 𝐯𝐢𝐝𝐞𝐨𝐬 𝐜𝐫𝐞𝐝𝐢𝐭𝐬:
- Pixabay
- NASA

📚𝐃𝐚𝐯𝐢𝐝'𝐬 𝐁𝐨𝐨𝐤𝐬
📕 𝗪𝗲𝗶𝗿𝗱 𝗠𝗮𝘁𝗵𝘀: 𝗔𝘁 𝘁𝗵𝗲 𝗘𝗱𝗴𝗲 𝗼𝗳 𝗜𝗻𝗳𝗶𝗻𝗶𝘁𝘆 𝗮𝗻𝗱 𝗕𝗲𝘆𝗼𝗻𝗱
(https://www.amazon.com/Weird-Maths-Agnijo-Banerjee-Darling/dp/1786072645)
📙 𝗪𝗲𝗶𝗿𝗱𝗲𝗿 𝗠𝗮𝘁𝗵𝘀: 𝗔𝘁 𝘁𝗵𝗲 𝗘𝗱𝗴𝗲 𝗼𝗳 𝘁𝗵𝗲 𝗣𝗼𝘀𝘀𝗶𝗯𝗹𝗲
(https://www.amazon.com/Weirder-Maths-At-Edge-Possible/dp/1786075083/)
📗 𝗪𝗲𝗶𝗿𝗱𝗲𝘀𝘁 𝗠𝗮𝘁𝗵𝘀: 𝗔𝘁 𝘁𝗵𝗲 𝗙𝗿𝗼𝗻𝘁𝗶𝗲𝗿𝘀 𝗼𝗳 𝗥𝗲𝗮𝘀𝗼𝗻
(https://www.amazon.com/Weirdest-Maths-David-Darling/dp/1786078058/)
** The kindle versions are available
*** For more details : http://weirdmaths.com/

📄𝗧𝗿𝗮𝗻𝘀𝗰𝗿𝗶𝗽𝘁𝗶𝗼𝗻:
In 2005, astronomers discovered an object in orbit around a star called GQ Lupi, which lies 495 light-years from Earth. The star is very young and is only about 70% as massive as the Sun. The mass of its companion, known as GQ Lupi b, is very uncertain but is estimated to lie between 3 and 36 times the mass of Jupiter.

Lupi b may be a gas giant – a planet like Jupiter, but much bigger: a super-Jupiter. It was one of the first exoplanet candidates to be directly imaged. It orbits around GQ Lupi at a distance of about 100 astronomical units – 2½ times the distance of Pluto from the Sun – with a period of 1,200 years.

We’d expect an object this far away from its star to be very cold but the surface temperature of Lupi b is between 1,800 and 2,350 Celsius. This indicates that Lupi b is making its own heat by nuclear fusion. If this is the case it may not be a planet at all but a brown dwarf – an object intermediate in mass between a planet and a star. Brown dwarfs aren’t massive enough to be able to fuse hydrogen into helium. However their core temperatures are high enough to slowly fuse deuterium (a heavy form of hydrogen) into lithium.

Much depends on what Lupi b’s mass turns out to be. If it’s at the low end of estimates, it would be less massive than the 15 Jupiter masses that theory predicts for the lightest brown dwarfs. However, astronomers would then be faced with explaining how a mere exoplanet could be so hot at such a great distance from its star.

In July 2021, astronomers made another fascinating discovery about GQ Lupi b. It appears to be surrounded by a ring of warm dust from which a moon may be in the process of forming. Astronomers are hoping to find out much more about this intriguing object through observations with the James Webb Space Telescope.

#lupi #exoplanet #largest

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