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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 8.

Top panel: the best-fit 1σ (darker shades) and 2σ (lighter shade) contours produced using the validation sample (G <  19 mag and RVerr < 55 km s−1), shown in blue shades, are compared with the contours from C. Badenes & D. Maoz (2012), shown in green shades. Both contours are 1σ smoothed using a Gaussian filter. The red dashed lines represent the expected number of super-Chandrasekhar-mass binaries that can merge within the age of the Universe. Bottom panel: the observed distribution of ﹩{\rm{\Delta }}{{\rm{RV}}}_{{\rm{\max }}}﹩ is compared with the model for the validation sample.

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