English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

The Habitable Worlds Observatory will attempt to image Earth-sized planets inHabitable Zone orbits around nearby Sun-like stars. In this work we exploreapproximate analytic yield calculations for a future flagship direct imagingmission for a survey sample of uniformly distributed set of identical Sun-likestars. We consider the dependence of this exoplanet detection yield on factorssuch as eta_Earth, telescope diameter, total on-sky time, orbital phase andseparation, inner working angle, flux contrast, desired signal-to-noise ratio,spectral resolution, and other factors. We consider the impact on yield andsurvey efficiency in the absence of and with precursor knowledge of theEarth-size analog exoplanets. In particular, for precursor knowledge we assumethe exoplanet orbital phase at the time of observation can be optimized so asto only image the Earth-size analog exoplanet when it is outside the innerworking angle. We find that the yield of flagship direct imaging missions suchas Habitable Worlds Observatory will be inner-working angle limited for theestimated exoplanet yields, and will not be impacted by precursor knowledgegiven our assumptions presented herein. However, we find that the surveyefficiency will be enhanced by precursor knowledge. We benchmark our analyticapproximations against detailed simulations for coronagraphs and starshadescarried out for the HabEx and LUVOIR missions concept studies, and findconsistent conclusions. Our analytic relations thus provide quick estimates andderivatives of the impact of key mission parameter choices on exo-Earth yieldwhen considering design trades that can supplement existing computationalsimulations.

Analytic relations assessing the impact of precursor knowledge and key mission parameters on direct imaging survey yield