Extended Data Fig. 7: Spectral energy distribution of 8 UMi.
From: A close-in giant planet escapes engulfment by its star
The distribution was estimated using BTVT magnitudes from Tycho-2, the JHKS magnitudes from 2MASS, the W1–W4 magnitudes from WISE, the GGBPGRP magnitudes from Gaia, and the NUV magnitude from GALEX. Red symbols represent the observed photometric measurements, where the horizontal error bars represent the effective width of the passband while the vertical error bars are 1σ (standard deviation) photometric uncertainties. Blue symbols are the model fluxes from the best-fit Kurucz atmosphere model (black), which have a reduced χ2 of 1.3, with extinction Av = 0.06 ± 0.02 mag, Teff = 4,900 ± 75 K, surface gravity log (g) = 2.5 ± 0.5 dex, and [Fe/H] = −0.5 ± 0.3 dex. Integration of the (unreddened) model SED gives the bolometric flux at Earth, Fbol = 6.48 ± 0.22 × 10−8 erg s−1cm−2.
