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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 3.

ePSF fitting indicates that MEAD 62 B is an unresolved point source. State-of-the-art model PSFs (M. Libralato et al. 2024) were used to fit the individual exposure for each of the 4 dither positions, assuming a single point source. The left panel is for the F1000W images, while the right panel is for the F1500W images. For each row of each panel, the observation is on the left, the best-fit PSF model in the middle, and the observation model residuals on the right. No apparent flux excess is seen in the residuals map, which is consistent with the obtained range of ePSF fitting reduced chi-squares: 0.99-1.27 (F1000W) and 1.00-1.49 (F1500W).

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