Evidence of Spectral Evolution on the white dwarf sample from the Gaia Mission

13 Jan 2020 Ourique G. Kepler S. O. Romero A. D. Klippel T. S. Koester D.

Since the Gaia data release 2, several works were published describing a bifurcation in the observed white dwarf colour$-$magnitude diagram for $\mbox{$G_{\mathrm{BP}}$}-\mbox{$G_{\mathrm{RP}}$} > 0$. Some possible explanations in the literature include the existence of a double population with different initial mass function or two distinct populations, one formed by hydrogen$-$ and one formed by helium$-$envelope white dwarfs... (read more)

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