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Double White Dwarf Binaries in SDSS-V DR19: A Catalog of DA White Dwarf Binaries and Constraints on the Binary Population

  • Authors: Gautham Adamane Pallathadka, Vedant Chandra, Nadia L. Zakamska, Nicole R. Crumpler, Stefan M. Arseneau, Kareem El-Badry, Boris T. Gänsicke, Yossef Zenati, J.J. Hermes, Axel D. Schwope, Carles Badenes, Nicola Pietro Gentile Fusillo, Sean Morrison, Tim Cunningham, Priyanka Chakraborty, Gagik Tovmasian, Dmitry Bizyaev, Kaike Pan, Scott F. Anderson, Sebastian Demasi

Gautham Adamane Pallathadka et al 2026 The Astrophysical Journal 1002 .

  • Provider: AAS Journals

Caption: Figure 7.

The likelihood contours for the fit with a low-mass WD binary fraction of 7.5%. The 1σ and 2σ constraints on fbin,0.4 and α are shown in different shades. The contours are smoothed with a Gaussian filter. The black dotted lines represent the DWD merger rate per WD in the Galaxy, and the red dashed lines represent the number of super-Chandrasekhar-mass binaries in the Galaxy that can merge within the age of the Universe.

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