Carbon dredge-up required to explain the Gaia white dwarf colour–magnitude bifurcation
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DOI: 10.1093/mnras/stad1574
Abstract: The Gaia colour–magnitude diagram reveals a striking separation between hydrogen-atmosphere white dwarfs and their helium-atmosphere counterparts throughout a significant portion of the white dwarf cooling track. However, pure-helium atmospheres have Gaia magnitudes that are too… read more here.
Keywords: bifurcation; white dwarf; carbon; white dwarfs ... See more keywords
A DECam view of the diffuse dwarf galaxy Crater II: the colour–magnitude diagram
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DOI: 10.1093/mnras/stz2826
Abstract: We present a deep Blanco/DECam colour–magnitude diagram (CMD) for the large but very diffuse Milky Way satellite dwarf galaxy Crater II. The CMD shows only old stars with a clearly bifurcated subgiant branch (SGB) that feeds… read more here.
Keywords: crater; galaxy crater; magnitude diagram; colour magnitude ... See more keywords