September 15, 2023


The John Bahcall Auditorium
Space Telescope Science Institute (STScI)
3700 San Martin Drive 3
Baltimore, MD 21218
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Meeting Leads

Meeting Chair: Yasuhiro Hasegawa (NASA/JPL)
Meeting Organizers: Tim Pearce (Friedrich Schiller University Jena), Isabel Rebollido (Centro de Astrobiologia INTA-SCIC), and Michael Meyer (University of Michigan)

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About the Meeting

The ExoPAG SAG 23 comprises interdisciplinary scientists, who study dust throughout the Solar System and Galaxy. Its aim is to review the gaps in our current knowledge of exo-zodiacal dust, particularly focussing on how this dust could impact future exoplanet-imaging efforts. The intent is to identify areas of exozodi and debris-disk science that should be prioritized in the coming years.

This workshop will bring together both SAG 23 members and researchers in the community. Its aims are to showcase the progress of the SAG efforts so far, and to get community input into its future direction. The meeting will be held without any registration fee and immediately follow the The First Year of JWST Science Conference at STScI.

Goals of the Workshop

The search for an Earth-like planet around a Sun-like star is a next major step in the exoplanetary field. A key milestone in this search will be the launch of the Habitable Worlds Observatory in the coming decade, that will be able to directly image planets in the habitable zone of their system. The dust located in that zone, known as exozodiacal dust, can hinder the detection, but also affect the atmosphere and surface of any planets there. The main purpose of this workshop is to get the community together in order to discuss how such hot and warm dust will be detected and characterized, and to prepare for future missions.

This will be a hybrid meeting, with an in-person component held at Space Telescope Science Institute (Baltimore, MD) on Friday, September 15th, 2023.

The goals of this workshop are to:
  • Present to the community the current state of the SAG 23 studies
  • Provide the opportunity for the community outside of the SAG 23 to participate and get involved.
  • Discuss the current state of both theoretical and observational studies about exozodi to identify key future studies.
  • Discuss precursor work that could benefit missions like the Roman Space Observatory or the Habitable Worlds Observatory.


Time (EDT) Duration (h:mm) Session Speaker(s)
9:00 AM 0:10 Opening remarks & introduction of SAG 23 John Debes (STScI; in person)
9:10 AM 0:40 SAG 23 Subject 1:
Theory of Exozodi Sources and Dust Evolution
Mark Wyatt (University of Cambridge; in person)
9:50 AM 0:40 SAG 23 Subject 2:
Pan-Chromatic Radiative Transfer of Exozodis
Ramya M Anche (University of Arizona; remote)
Nicole Pawellek (University of Vienna; remote)
10:30 AM 0:40 SAG 23 Subject 3:
A Catalog of Dusty Systems around Nearby Stars
Angelle Tanner (Mississippi State University; remote)
11:10 AM 0:40 SAG 23 Subject 4:
Solar System Zodi
Geoff Bryden (JPL/Caltech; remote)
11:50 PM 1:10 LUNCH BREAK (70 min)
1:00 PM 0:20 Talk 1 from non-members:
Mitigating Worst-Case Exozodiacal Disk Structure in Direct Images of Earth-like Exoplanets
Miles Currie (University of Washington; in-person)
1:20 PM 0:20 Talk 2 from non-members:
Data imputation for high-contrast imaging disk recovery
Bin Ren (Côte d'Azur Observatory; remote)
1:40 PM 0:20 Talk 3 from non-members:
Irregular satellites and the origin of debris disks
Brad Hansen (UCLA; remote)
2:00 PM 0:40 SAG 23 Subject 5:
Post-Processing and Detection of Extended Sources
Ewan Douglas (University of Arizona; remote)
Max Millar-Blanchaer (UCSB; remote)
2:40 PM 0:40 SAG 23 Subject 6:
A Review of Hot Dust Systems
Steve Ertel (University of Arizona; remote)
3:20 PM 0:10 COFFEE BREAK (10 min)
3:30 PM 0:40 SAG 23 Subject 7:
Prioritization of Precursor Observational studies of Debris disks/Exozodis for future direct imaging missions
Max Millar-Blanchaer (UCSB; remote)
William C. Danchi (GSFC; in person)
4:10 PM 0:40 SAG 23 Subject 8:
Prioritization of Precursor Theoretical studies of Debris disks/Exozodis for future direct imaging missions
Virginie Faramaz (University of Arizona; remote)
4:50 PM 0:40 SAG 23 Subject 9:
Update and prioritization of ExEP Gaps relevant to ExoZodis
Kielan Hoch (STScI; in person)
5:30 PM Concluding Remarks

Workshop Logistics


There is no charge to attend the workshop.
Attendees are requested to complete the online registration form for planning purposes.


The John Bahcall Auditorium
Space Telescope Science Institute (STScI)
3700 San Martin Drive 3
Baltimore, MD 21218
Conference Room: To be announced

Code of Conduct

Both online and in person participants will have to adhere to STScI's code of conduct.