What is a white dwarf creating a shockwave?

A white dwarf is the dense remnant of a star that has exhausted its nuclear fuel, now siphoning gas from a companion star and creating a visible shockwave.

Why are astronomers puzzled by the white dwarf's shockwave?

Scientists are puzzled because the observed outflow of gas creating the shockwave cannot be explained by current astrophysical models for this specific white dwarf system.

Where is the white dwarf creating the shockwave located?

The white dwarf is located in the Milky Way galaxy, approximately 730 light-years from Earth, in the constellation Auriga.

Home / Science / White Dwarf's Colorful Shockwave Puzzles Astronomers

White Dwarf's Colorful Shockwave Puzzles Astronomers

13 Jan

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Summary

A white dwarf is creating a colorful shockwave in space.
The shockwave is caused by gas siphoned from a companion star.
Astronomers are puzzled by the mechanism behind the outflow.

White Dwarf's Colorful Shockwave Puzzles Astronomers

Astronomers have detected a white dwarf, a compact stellar ember comparable in size to Earth, producing a vivid shockwave as it traverses the Milky Way. This phenomenon, observed using the Very Large Telescope in Chile, reveals a bow shock glowing in red, green, and blue hues, indicative of heated hydrogen, nitrogen, and oxygen from interstellar gas.

The white dwarf, located approximately 730 light-years away, is in a binary system, drawing gas from its red dwarf companion. This gas is channeled along the white dwarf's magnetic field, but the outflow mechanism responsible for the expansive, thousand-year-old shockwave remains a mystery. Scientists are intrigued because this system lacks a surrounding gas disk, unlike other observed white dwarfs creating shockwaves.

White dwarfs represent the final stage of evolution for stars like our sun. This particular system's unique outflow is significant because it challenges existing astrophysical models. The striking visual of the shockwave serves as a dynamic reminder of the active and energetic nature of interstellar space.