STScI/JHU HotSci 2025: ISM Feedback

Value of the Information & Strength of the Argument

The value of the information is high for researchers in galaxy evolution and massive star astrophysics. Nedkova’s talk provides new observational data from the PASSAGE survey, which is unique in its unbiased selection and depth, and addresses a key question about the MZR at low masses. Her argumentation is logical, clearly explaining the baryon cycle and the importance of calibrations. Hawcroft’s talk presents a novel approach to the weak-wind problem using MIRI data, which is a significant step forward. The argumentation is solid, based on hydrodynamical simulations and new observations. Both speakers acknowledge limitations and ongoing work, which adds credibility.

Scientific Rigor, Source Quality, Title Accuracy

The scientific rigor is high: both talks are based on original research with detailed methodology. Nedkova cites the PASSAGE collaboration and recent papers by Ravolski et al. (2024). Hawcroft mentions the massive stars group at STScI and collaborators. The title accurately reflects the content, as both talks focus on ISM feedback. The video is a seminar recording, so sources are not formally cited, but the speakers reference their own work and collaborations. The adequacy between title and content is good.

The title accurately reflects the content, as both talks focus on feedback processes in the interstellar medium, one on galaxy-scale baryon cycle and the other on stellar winds.

8/10

The video presents two scientific talks by postdoctoral researchers at STScI, based on original research using JWST data. The content is technical and detailed, with references to ongoing collaborations and recent publications. The speakers are experts in their fields, and the presentations follow standard scientific conference format. However, the results are preliminary and not yet peer-reviewed, and the video is a recording of a seminar, not a formal publication.

Markers derived by PSI from the transcript: the creator did not define chapters.

• 00:00Introduction by organizer, welcoming attendees to the last HotSci of summer.
• 01:00Kalina Nedkova begins her talk on PASSAGE survey and mass-metallicity relation.
• 05:00Nedkova explains the PASSAGE survey design and grism spectroscopy.
• 10:00Nedkova shows example spectra and discusses line fitting.
• 15:00Nedkova presents the baryon cycle and its connection to the MZR.
• 20:00Nedkova shows preliminary MZR results from one field, no flattening observed.
• 25:00Nedkova discusses follow-up programs and future prospects with Roman.
• 30:00Q&A session for Nedkova's talk.
• 35:00Calum Hawcroft begins his talk on the weak-wind problem in massive stars.
• 40:00Hawcroft explains the weak-wind problem and its significance.
• 45:00Hawcroft presents JWST/MIRI observations of fine-structure lines.
• 50:00Hawcroft shows preliminary results and implications for stellar evolution.
• 55:00Q&A session for Hawcroft's talk.
• 1:00:00Closing remarks and thanks.

• PASSAGE survey (JWST pure-parallel program) — Nedkova's talk is based on the PASSAGE survey, a JWST pure-parallel program.
• Ravolski et al. 2024 (MUSE Ultra Deep Field) — Nedkova references this paper for strong-line calibrations at intermediate redshifts.
• Massive stars group at STScI — Hawcroft mentions collaboration with the massive stars group at STScI.

• Ravolski et al. 2024 — Nedkova's results align with this paper's MZR measurements.

• Earlier JWST results suggesting flattening — Nedkova's preliminary results do not show the flattening reported in some earlier JWST studies.