Key Takeaways
1. Brown dwarfs are “failed stars” with masses between 13 to 80 times that of Jupiter.
2. Astronomers found two brown dwarfs, ZTF J1239 and ZTF J1239+8347, located about 1,000 light-years from Earth.
3. The more massive brown dwarf may draw matter from its partner, potentially igniting nuclear fusion.
4. There is a possibility that the two brown dwarfs could merge to form a new star.
5. The origins of these brown dwarfs are unclear, with theories suggesting they may have come closer due to the gravitational influence of a larger star.
There are countless stars scattered throughout the universe, and they come in various types. Some examples include white dwarfs, yellow dwarfs like our Sun, and red dwarfs. Among them are brown dwarfs, often referred to as failed stars. These objects have masses ranging from 13 to 80 times that of Jupiter, which prevents them from becoming full-fledged stars. Recently, astronomers made a remarkable discovery: two brown dwarfs might actually merge to form a new star.
Observations from ZTF
Using data from the Zwicky Transient Facility (ZTF) at the Palomar Observatory in California, researchers found that the two brown dwarfs were in close proximity. Located approximately 1,000 light-years away from Earth, they are identified as ZTF J1239+8347 (or ZTF J1239) and possess masses between 60 and 80 times that of Jupiter. Intriguingly, they could fit within the orbit of the Moon around our planet.
The closeness of these brown dwarfs allows the more massive one to draw matter from its partner. This process could enable it to gain enough mass to ignite nuclear fusion. However, astronomers also consider the possibility that these two objects might merge, leading to the creation of a new star.
Unraveling the Mystery
Despite this exciting discovery, the exact origin of these brown dwarfs is still uncertain. Some theories suggest they may have drifted closer together due to the gravitational pull of a larger star during their long journey through space. More observations will be crucial to uncover their origins and to learn about their future.
The findings are published in The Astrophysical Journal Letters.
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