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Top: converged temperature profile of the best-...

Top: converged temperature profile of the best-fit Cloudy model to the Mg II feature, wh...

Austin Baldwin et al, The Astronomical Journal 171 3

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Top: program-level coadded HST/STIS/E230M spect...

Top: program-level coadded HST/STIS/E230M spectrum of host star KELT-9. Middle: same as ...

Austin Baldwin et al, The Astronomical Journal 171 3

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Top: raw STIS/E230M white-light curve for KELT-...

Top: raw STIS/E230M white-light curve for KELT-9b for Visit 1 (left) and Visit 2 (right)...

Austin Baldwin et al, The Astronomical Journal 171 3

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Comparison between the Hα observations of F. Ya...

Comparison between the Hα observations of F. Yan & T. Henning (2018), their Gaussian fit...

Austin Baldwin et al, The Astronomical Journal 171 3

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Best-fit sunbather model (gold, T = 13,200 K,...

Best-fit sunbather model (gold, T = 13,200 K, ﹩\dot{M}\,=\,1{0}^{11.5}﹩ g s−1, Vbroad ...

Austin Baldwin et al, The Astronomical Journal 171 3

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Same as Figure 3, but for two 1 Å wide bins fro...

Same as Figure 3, but for two 1 Å wide bins from Visit 1, centered at 2700.2 Å (left) an...

Austin Baldwin et al, The Astronomical Journal 171 3

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χ2/N grids of the mass-loss rate (...

χ2/N grids of the mass-loss rate (﹩{\mathrm{log}}_{10}\dot{M}﹩) vs. the broadening veloc...

Austin Baldwin et al, The Astronomical Journal 171 3

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Same as Figure 4, but for two 1 Å wide bins fro...

Same as Figure 4, but for two 1 Å wide bins from Visit 2, respectively, outside and insi...

Austin Baldwin et al, The Astronomical Journal 171 3

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The initial second-degree systematics vector fi...

The initial second-degree systematics vector fitting for the first transit, with respect...

Austin Baldwin et al, The Astronomical Journal 171 3

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Best-fit model spectrum (gold, T = 13,200 K, ...

Best-fit model spectrum (gold, T = 13,200 K, ﹩\dot{M}\,=\,1{0}^{12.5}﹩ g s−1, Vbroad = ...

Austin Baldwin et al, The Astronomical Journal 171 3

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Comparison between STIS E230M transit observati...

Comparison between STIS E230M transit observations of KELT-9b (blue, purple), WASP-121b ...

Austin Baldwin et al, The Astronomical Journal 171 3

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Collection of exoplanets with measurements of M...

Collection of exoplanets with measurements of Mg II in the NUV. The XUV irradiation (90–...

Austin Baldwin et al, The Astronomical Journal 171 3

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