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    "story_id": "mp-2026-08-04-003",
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    "headline": "Ultraviolet Polarization Needed Two Ways to Align a Grain",
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    "dek": "Radiative torque plus paramagnetic relaxation reproduced the ultraviolet excess seen toward two stars.",
    "summary": "Radiative torque plus paramagnetic relaxation reproduced the ultraviolet excess seen toward two stars.",
    "body_text": "Models constrained with four stellar sightlines tested how dust-grain alignment shapes interstellar polarization from infrared through far ultraviolet. For HD 30614 and HD 204827, radiation from a B-type star below the Lyman limit strengthened radiative-torque alignment, while adding Davis-Greenstein paramagnetic relaxation improved the shortest-wavelength fit. Two ordinary Serkowski spectra were explained mostly by radiative torque under a typical interstellar field. The work is a model interpretation of existing observations, not a new direct image of dust grains.",
    "why_it_matters": "Radiative torque plus paramagnetic relaxation reproduced the ultraviolet excess seen toward two stars.",
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      "The work is a model interpretation of existing observations, not a new direct image of dust grains."
    ],
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        "text": "Radiative torque plus paramagnetic relaxation reproduced the ultraviolet excess seen toward two stars.",
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        "qualification": "The work is a model interpretation of existing observations, not a new direct image of dust grains."
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    "tags": [
      "astronomy",
      "dust",
      "polarization",
      "radiative torque"
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    {
      "source_id": "source-2026-08-04-003",
      "title": "Astronomy & Astrophysics: physical basis of Serkowski polarization spectra",
      "publisher": "EDP Sciences",
      "url": "https://doi.org/10.1051/0004-6361/202558501",
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    "title": "Ultraviolet Polarization Needed Two Ways to Align a Grain",
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    "published_at": "2026-08-04T09:00:00.000-04:00",
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