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- W2260293309 abstract "Exoplanets have sparked interest in extremely high signal-to-noise ratio spectroscopic observations of very bright stars, in a regime where flux calibrators, in particular DA white dwarfs, are not available. We argue that A-type stars offer a useful alternative and reliable space-based spectrophotometry is now available for a number of bright ones in the range 3<V<8 mag. By means of comparing observed spectrophotometry and model fluxes, we identify 18 new very-bright trustworthy A-type flux standards for the optical range (400-800 nm), and provide scaled model fluxes for them. Our tests suggest that the absolute fluxes for these stars in the optical are reliable to within 3%. We limit the spectral range to 400-800 nm, since our models have difficulties to reproduce the observed fluxes in the near-infrared and, especially, in the near-UV, where the discrepancies rise up to ~ 10%. Based on our model fits, we derive angular diameters with an estimated accuracy of about 1%." @default.
- W2260293309 created "2016-06-24" @default.
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- W2260293309 date "2015-12-03" @default.
- W2260293309 modified "2023-09-27" @default.
- W2260293309 title "New bright optical spectrophotometric standards: A-type stars from the STIS Next Generation Spectral Library" @default.
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- W2260293309 doi "https://doi.org/10.1093/mnras/stv2518" @default.
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