An Ultra-hot Low-mass Brown Dwarf Eclipsing the Puffy White Dwarf J0404+1112

Bibcode
2025RNAAS...9..270D
DOI
10.3847/2515-5172/ae1228
de Wit, J.; Alonso, R.; Rackham, B. V.; Lederer, S. M.; Burdanov, A. Y.; Barkaoui, K.; Albornoz, M.; Cavalier, T.; Gillon, M.; Triaud, A. H. M. J.; Boogert, A.; Timmermans, M.
Referencia bibliográfica

Research Notes of the American Astronomical Society

Fecha de publicación:
10
2025
Número de autores
12
Número de autores del IAC
2
Número de citas
0
Número de citas referidas
0
Descripción
Most exoplanets known orbit stars that will evolve into red giants, then white dwarfs (WDs). Understanding the population of substellar WD companions informs the common-envelope evolution process (E. Villaver & M. Livio 2009), thereby shedding light on the current and future planetary population of the Milky Way. Here, we report the discovery of a low-mass (25 ± 5MJup) brown dwarf (BD) fully eclipsing every 2.93 hr the WD J0404+1112, which we found to be an unexpectedly large host WD (2REarth). The eclipsing nature of the system, the low masses of the primary (∼0.3MSun) and secondary, and the large day–night temperature contrast for the BD ( ⪭ 2000 K) make it a prime target amongst the dozen WD+BD systems known for a detailed study via JWST phase-curve observations.
Tipo
Sin árbitro
Estrellas binarias eclipsantes
Estrellas enanas blancas

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