# The Future of Exoplanet Direct Detection

**Authors:** John D. Monnier, 65 endorsers  
**arXiv:** [1907.09561](https://arxiv.org/abs/1907.09561)  
**Date:** 2019-07-22  
**Summary page:** https://www.summarizepaper.com/en/arxiv-id/1907.09561v1/

## Key points

- Diffraction fundamentally restricts our ability to image and characterize exoplanets
- Interferometry offers advantages in exoplanet detection and characterization
- Speckle suppression through spatial coherence can enhance imaging capabilities
- Interferometry can provide a boost in astrometric precision for determining exoplanet orbits
- Interferometers can take a census of young giant exoplanets within clusters younger than 50 Myr, providing insights into planetary system formation and evolution
- Interferometers offer potential for infrared nulling from space, enabling the detection of terrestrial planets and search for atmospheric biomarkers
- Fulfilling the promises of exoplanets and interferometers will require significant time and investment

## Summary

This white paper titled "The Future of Exoplanet Direct Detection" by John D. Monnier and endorsed by 65 individuals explores the limitations of current and planned coronagraphic searches for exoplanets. It highlights that diffraction fundamentally restricts our ability to image and characterize exoplanets, with the inner working angle being limited to a few lambda/D. To overcome these limitations, the paper suggests that interferometry offers several advantages in exoplanet detection and characterization. One such breakthrough is speckle suppression through spatial coherence which could significantly enhance imaging capabilities. Additionally, interferometry has the potential to provide a substantial boost in astrometric precision for determining exoplanet orbits. Another advantage highlighted in the paper is the ability of interferometers to take a census of young giant exoplanets within clusters younger than 50 Myr which could provide valuable insights into the formation and evolution of planetary systems during their early stages. Furthermore, interferometers offer unparalleled potential for infrared nulling from space enabling the detection of terrestrial planets and search for atmospheric biomarkers - opening up new possibilities for studying habitable worlds beyond our solar system. The paper concludes by emphasizing that while there are promising prospects for exoplanets and interferometers fulfilling these promises will require significant time and investment - nevertheless it anticipates an exciting future where advances in interferometric techniques contribute to groundbreaking discoveries in exoplanet research.