= Heather A. Knutson
{c}
<Heather A. Knutson> mapped the thermal emission of the <exoplanet> <HD 189733 b> from its changing <infrared> brightness over part of an <orbit>. Different viewing phases expose different fractions of the hot dayside and cooler nightside.
The measured phase dependence constrained the longitudinal brightness distribution rather than producing a spatially resolved photograph. The relatively modest day–night contrast implied efficient redistribution of absorbed stellar <energy>, while the displaced brightness maximum supplied evidence about atmospheric transport. Inferred brightness <temperatures> apply to the observing band and adopted emission model.<A map of the day-night contrast of the extrasolar planet HD 189733b by Heather A. Knutson and others>[Abstract: orbital phase measurements, 8-micrometre brightness temperatures and shifted maximum]{ref}
\Image[https://commons.wikimedia.org/wiki/Special:Redirect/file/Heather%20Knutson%20studies%20exoplanets%20at%20Caltech.jpg?width=330]
{title=<Heather A. Knutson> studying <exoplanets> at Caltech}
{description=NASA/Jet Propulsion Laboratory image, 2018; the Wikimedia Commons record identifies the subject and NASA public-domain origin.}
{source=https://commons.wikimedia.org/wiki/File:Heather_Knutson_studies_exoplanets_at_Caltech.jpg}
{width=330}
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