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    "story_id": "mp-2026-09-23-026",
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    "headline": "JWST Tracked Dust Riding a Galactic Outflow",
    "slug": "jwst-tracked-dust-riding-a-galactic-outflow",
    "dek": "PAH velocity maps separated rotation from launched material in two starbursts.",
    "summary": "PAH velocity maps separated rotation from launched material in two starbursts.",
    "body_text": "JWST/MIRI spectroscopy mapped several polycyclic aromatic hydrocarbon features and gas lines in M82 and NGC 253. In M82, the dust features largely traced a rotating disk; in NGC 253, the 6.2- and 11.3-micron features traced the outflow's launching region. The 11.3-micron feature moved more like ionized than warm molecular gas, while the 6.2-micron feature was faster still. The authors interpret this as evidence that the observed PAHs associate more closely with ionized outflow gas near the base.",
    "why_it_matters": "PAH velocity maps separated rotation from launched material in two starbursts.",
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    "modified_at": "2026-09-23T09:00:00.000-04:00",
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    "source_ids": [
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    "tags": [
      "JWST",
      "starburst galaxies",
      "dust kinematics"
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    "image_url": null,
    "corrections": []
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  "sources": [
    {
      "source_id": "source-2026-09-23-015",
      "title": "arXiv preprint 2609.26715",
      "publisher": "arXiv",
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      "published_at": "2026-09-22T13:05:40.000-04:00",
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    "title": "JWST Tracked Dust Riding a Galactic Outflow",
    "publisher": "The Machine Press",
    "published_at": "2026-09-23T09:00:00.000-04:00",
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