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The MIRI Excesses Around Degenerates (MEAD) Survey. I. A Candidate Cold Brown Dwarf in Orbit Around the Nearby White Dwarf 2MASS J09424023−4637176

  • Authors: Loïc Albert, Sabrina Poulsen, Érika Le Bourdais, John H. Debes, Samuel Boucher, Mukremin Kilic, William Reach, Susan E. Mullally, Misty Cracraft, Fergal Mullally, Matthew De Furio, David A. Golimowski, J. J. Hermes, Scott J. Kenyon, Carl Melis, Seth Redfield, M. C. Wyatt, Patrick Dufour, Jay Farihi, Ashley Messier

Loïc Albert et al 2026 The Astronomical Journal 171 .

  • Provider: AAS Journals

Caption: Figure 4.

White dwarf physical properties. (Top) Fit of the white dwarf spectral energy distribution probed using 9 photometric bands, W2 (red) was excluded from the fit. It converges to a DA white dwarf with Teff = 5968 ± 124K, Teff = 5986 ± 72 K, and surface gravity of ﹩\mathrm{log}g=8.03\pm 0.02﹩. The model and photometric fit are plotted in orange, and the photometric data used for fitting are represented by the black error bars. (Bottom) Best estimates of the final white dwarf mass, initial main-sequence mass, white dwarf cooling age, main-sequence lifetime, and total system age based on the wdwarfdate Python package (R. Kiman et al. 2022) using the above temperature and gravity as inputs.

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