I Love The Colorful Stars

Key Points:

• New research from the University of Warwick reveals that some white dwarf stars can appear in unusual colors, such as green or salmon pink, due to the absorption of specific wavelengths by heavy elements in their atmospheres.
• Traditional star models use black-body radiation assumptions, which predict star colors based solely on temperature, but this new model accounts for the presence of elements like lithium, sodium, potassium, calcium, and carbon that alter the star’s visible light spectrum.
• The study highlights white dwarf star WD J1330+6435, which may appear pale green due to elements it has accreted by consuming nearby planets or debris, and WD J1011+2845, which could look salmon pink because of carbon near its surface.
• Despite these colorful exceptions, most white dwarfs remain white, with about 29 out of 30 stars in the sample showing no unusual coloring, suggesting that vibrant star colors are rare in the universe.
• This discovery expands our understanding of stellar appearances and suggests that in the far future, our own Sun might display unique hues during its white dwarf phase as it consumes inner planets.