A new type of star which has never been observed before in X-ray light

Image credit: European Space Agency (ESA)

The star formed after the collision and merger of two white dwarfs (WDs). Instead of tearing each other apart in this fiery event, the white dwarfs united to become a new object shining brightly in X-ray light.

Scientists used European Space Agency’s (ESA) XMM-Newton telescope to observe and study this object. It was originally discovered back in 2019.

At that time, scientists noted that the object is too bright and have very high wind speeds, thus the object is far too massive to be a regular white dwarf.

This indicated that the object is new type of star which survived the merger event of two white dwarfs (WDs). The object has been named IRAS 00500+6713.

Now, based on the new observations from XMM-Newton telescope, scientists propose that what we observe in the above image is a new type of X-ray source powered by the merger event of two white dwarf stars (WDs).

The nebula- remnant of the collision- can also be seen in the image. It is mostly made out of the neon element which is shown in green.

The star is highly unstable and will probably collapse into a neutron star within about ten thousand years.

For more details: X-rays observations of a super-Chandrasekhar object reveal an ONe and a CO white dwarf merger product embedded in a putative SN Iax remnant

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