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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 10.

Top left: RV curve of J112328.50+095619.3 phase-folded at the best-fit period of 8.04 hr. Top left: the power spectrum (blue), best-fit period (red), 5% false-alarm probability level (green), and 1σ range for the best-fit period (gray shading). Bottom: zoomed-in view of the Hβ absorption line after coadding spectra with similar phases. Spectra with similar RVs are shown with similar colors, and the expected position of the line cores using the measured RVs is shown via dotted lines. We see line depth variation over time along with a Doppler shift in the absorption lines, consistent with measured velocities.

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