Fast approaching ‘star’ towards our galaxy, caused by a supernova?

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A ‘star’ is moving fast towards our galaxy Milky Way. It is going to come out from the edge of the galaxy at a speed of about 32 lakh kilometers per hour. A new study has told that about 2 thousand light-years away from Earth, this star actually exploded, after which a piece of it flew into space at high speed. JJ Hermes, the study’s author and associate professor of astronomy at Boston University, and his colleagues believe that this star, named LP 40-365, is a very dense fragment of a white dwarf star passing by. Another study author, Audelia Peterman, pointed out that not being completely eliminated is a unique thing in itself.

rotating on its axis
This star was discovered on the analysis of survey data from the US space agency NASA’s Hubble Space Telescope. Apart from this, data from the Transiting Exoplanet Survey Satellite (TESS) was also taken and it was found that LP 40-365 is not only running fast but also rotating every 9 hours. Normally all stars spin on their axis, but LP 40–365 is very low, especially for objects that have gone through a supernova. This indicates that it was once part of a system of two stars. Such stars orbit each other. When this system contains a white dwarf star that starts giving its mass to another star, it turns into a supernova explosion. It becomes difficult to know from which star the mass has gone to the other star. However, on the basis of its speed, the researchers estimate that the fragment shown is derived from the supernova itself. Interestingly, such objects that have survived after a supernova have a lot of metals in addition to hydrogen and helium.

[Attribution to NBT]

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