Code of Conduct

The organizers are committed to making this focus meeting productive and enjoyable for everyone, regardless of any aspects of identity. The SOC will make sure all participants abide by the ISC rules on non-discrimination, as well as the IAU anti-harassment policy, to help us achieve a safe and positive focus meeting for everyone.


Program Outline (with confirmed speakers)

We allocated six slots for targeted invited talks. All remaining slots will be filled with oral contributions by junior and senior scientists who register and submit an abstract for this meeting. The SOC members will not have guaranteed slots for talks. We will also have a dedicated flash poster session, one of whose purpose is to give early career scientists (including graduate students) visibility and an opportunity to advertise their research.

Session 1: The FUV and EUV from massive stars

  • Can we trust models for the ionizing continuum of massive stars?
  • What is the ionizing source of nebular He II?
  • What are the properties of extremely metal-poor massive stars?
  • Andreas Sander — Massive Stars in the Far and Extreme UV (invited talk) 
  • Jorick Vink — X-Shooting ULLYSES (talk)
  • Kathryn Grasha — Non-Solar Scaled Abundances for Massive Stars: The Chemical Abundance Breakthrough for Galaxy Evolution (talk)
  • Olivier Verhamme — Weakening the Winds with the ULLYSES Data Set: Examining the Presence of a Bi-Stability Jump (talk)


Session 2: Binary stars

  • Frequency of massive stars in binaries
  • Effects on population properties in star clusters
  • Observational tests
  • Hugues Sana — Massive Binaries and the UV Connection (invited talk) 
  • Calum Hawcroft — New Empirical Mass-Loss Rates and Wind Properties of Massive Stars at Low Metallicity (talk)
  • Gautham Narayana Sabhahit — Mass-Loss Implementation and Temperature Evolution of Very Massive Stars (talk)


Session 3. Very massive stars and very metal-poor stars

  • Probability of existence and future observation
  • Theoretical properties
  • Clues from observations of massive super star clusters
  • Miriam Garcia — Very Massive Stars and Very Metal-Poor Stars: Connected Topics? (invited talk) 
  • Aida Wofford — Are Very Massive Stars Truly Needed to Explain the Extreme Broad He II Emission of NGC 3125-A1? (talk)
  • Grace Telford — The Ionizing Spectrum of an Extremely Metal-Poor O Star Powering an HII Region (talk)
  • Karla Arellano-Cordova — Modeling the Ionizing Spectrum of Local Star-Forming Galaxies (talk)
  • Peter Senchyna — Direct Constraints on the Massive Stars Underlying Strong High-Ionization Nebular Emission Locally (talk)


Session 4. Massive stars in extragalactic star clusters

  • Implications for massive stars from cluster observations
  • Is the stellar initial mass function universal?
  • Scaling relations with observed properties: masses, ages, formation efficiency
  • Paul CrowtherObservations of Massive Stars in Extragalactic Star Clusters (invited talk) 
  • Dooseok Jung — Universal Upper Ends of the Stellar Initial Mass Function in the Young and Compact LEGUS clusters (talk)
  • Katarzyna Nowak — Could Kilomasers Pinpoint Supermassive Stars? (talk)
  • Mattia Sirressi — Clues to Massive Star Clusters as Engines of Galaxy Evolution (talk)
  • Naira Azatyan — The Stellar Content of UCHII Regions: The Molecular Cloud GRSMC 045.49+00.04 (talk)


Session 5. Feedback from massive stars in stellar clusters

  • Mechanical energy from stellar winds and supernovae in stellar clusters
  • How does time-dependent feedback affect the dynamics and chemical composition of the ISM?
  • Evidence of multiple populations in young clusters and link to evolved clusters
  • Sara Beck — Stars and Gas in Clusters: Feedback, Efficiency, and Emergence (invited talk) 
  • Keunho Kim — How Ionizing Radiation Escapes from Compact Star-Forming Regions in the Sunburst Galaxy (talk)
  • Lena Komarova — Lyman Continuum-Driven Superwind in Green Pea Analog Mrk 71 (talk)
  • Michael Rutkowski — OVI Emission in the Halos of z~0.25 Star-Forming Galaxies (talk)
  • Varsha Ramachandran — Massive Star Feedback in the Magellanic Clouds and the Tidal Bridge (talk)


Session 6. Population models for young star clusters

  • Do observations of clusters suggest deficiencies in our understanding of massive star evolution?
  • Constraining the EUV ionizing continuum from FUV stellar population synthesis models
  • Evidence of multiple populations in young clusters and link to evolved clusters
  • Gustavo Bruzual — Modeling Young Star Cluster Populations (invited talk) 
  • Jaehong Park — Calibrating Excursion Set Reionization Models to Approximately Conserve Ionizing Photons (talk)
  • John Chisholm — What Lurks Below the Lyman Limit? Unearthing the Unseen Ionizing Continua of Extragalactic Massive Star Populations (talk)
  • Kaelee Parker — Tracing Massive Star Populations with Neutral and Low-Ionization Gas (talk)


E-Poster Session

  • Ali Taani — Studying the Age of Supergiant Companions in the Magnetized X-ray Binaries (e-poster)
  • Ashkbiz Danehkar — UV Diagnostics of Radiatively Cooling Superwinds in Super Star Clusters (e-poster)
  • Claus Leitherer — A New Probe of Dust Attenuation in Star-Forming Galaxies (e-poster)
  • Gustavo Bruzual — A New Demarcation Line in the BPT Diagram From Optical and Infrared Line Emission Ratios (e-poster)
  • Miora Rakototafika — Investigating the Properties of Star Cluster Complexes in the Collisional Ring Galaxy Arp 147 (e-poster)
  • Riley Owens — Toward Analysis of UV Integrated Spectra with a Full Spectrum Fitting Tool (e-poster)
  • Riley Owens — Spatially Variable Lyɑ Line Profiles and Environments in a Strong LyC Leaking Galaxy (e-poster)
  • Sally Oey — Nebular C IV Imaging of Mrk 71 with HST (e-poster)
  • Sang-Hyun Chun — Metallicity-Dependent Mixing Length in the Evolutionary Model from Red Supergiant Stars in IC 1613 (e-poster)