8/23/2023 0 Comments Rapunzel sun dotDOI: 10.48550/arxiv.2306.08672Īn international team of astronomers has discovered a planet-like object that is hotter than the sun. The illustrations on top demonstrate the system's configuration at each orbital phase. The error bars show the standard deviation. ![]() The bottom panels show the residuals of the white-dwarf component (middle) and the irradiated companion (bottom). The primary's (secondary's) best-fit curve is marked by the blue dashed (red dotted) line on both panels. b, radial velocity curves (top panel) of the white dwarf (blue circles) and the irradiated companion (red diamonds), folded over the orbital period (□ = 8340.9090 s). Its "inverted" shape, evident especially near quadrature, is the result of non-local thermodynamic equilibrium (NLTE) effects. ![]() The emission from the companion (in yellow) appears in anti-phase with the primary, and is visible only from the irradiated day side, between orbital phases ∼ 0.2–0.8. The primary absorption is clearly seen in blue. a, trailed UVES spectrum for the H□ line of WD 0032−317 (blue represents lower fluxes, and yellow represents higher fluxes), folded over the orbital period (□ = 8340.9090 s). Phased radial-velocity curves of WD 0032−317.
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