The highest-resolution images in astronomy (notably from the Event Horizon Telescope) are all for AGN through radio VLBI. Could this be matched for stars, and in visible light? Hanbury Brown and Twiss provided a proof of concept already in the 1950s when they invented optical intensity interferometry. After decades of hibernation, recent years have seen intensity interferometry implemented again on Cherenkov Telescopes and regular telescopes, with science results from 2019 onwards. Implementation on the Cherenkov Telescope Array (CTA) could image stellar surfaces, and outflow and accretion phenomena in stars.

This session aims to present these exciting developments to the wider community, and gather expertise on novel science cases at resolutions of < 0.1 mas at optical wavelengths, including shorter wavelengths (below 500 nm).

Programme

• Recent observations
• Science cases with future facilities
• Instrument development

Invited speakers

Scientific organisers

• Dainis Dravins (Lund, SE, co-chair)
• Tarek Hassan (CIEMAT, ES)
• Alison Mitchell (Erlangen, DE, co-chair)
• Prasenjit Saha (Zurich, CH, chair)
• Andreas Zmija (Erlangen, DE)

Contact

psaha @ physik.uzh.ch