Brown dwarfs are actually... purple?

A nice and interesting open-access research about the true (?) colour of brown dwarfs

Quote :

There has always been interest in the perceived colors of stars. They were key to the development of the Hertzsprung–Russell diagram, and they are also used widely in educational and public-outreach imagery. Thus, it is useful to develop tools to compute these colors from spectral energy distributions. This paper presents a collection of objective (CIE coordinate) and subjective (RGB triple) colors for main-sequence stars and brown dwarfs, as well as links to related codes and tables. Using the proposed conversion from CIE to RGB colors, O and B stars are bluer than equivalent blackbodies because of Paschen continuum absorption, and M dwarfs tend to be less red and more beige. Although brown dwarfs over a wide range of effective temperatures (400–2000 K) emit most of their flux in the infrared, their visible spectra are dominated by short wavelengths. Thus, they may appear violet to human eyes.

Hence we should call them "purple dwarfs" now, right?

I remember studies from years ago that stated L and T dwarfs are purple from methane absorption of green and cyan wavelengths. Y dwarfs apparently have little to no visible light emission.

Also, link? Wherezat?

Here's the link if anyone else wants to read the paper.
https://iopscience.iop.org/article/10.3847/2515-5172/ac225c

Awesome!!

Sirius_Alpha wrote:

Here's the link if anyone else wants to read the paper.
https://iopscience.iop.org/article/10.3847/2515-5172/ac225c

Shame! I had not posted the link to the paper

Fixed...