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    "story_id": "mp-2026-08-06-026",
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    "headline": "A Merger's Tide Flipped at Fifty-Five Degrees",
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    "dek": "An analytical treatment separates disruptive and compressive tidal regimes in galaxy encounters and predicts where diffuse gas feels the switch most strongly.",
    "summary": "An analytical treatment separates disruptive and compressive tidal regimes in galaxy encounters and predicts where diffuse gas feels the switch most strongly.",
    "body_text": "An analytical framework for galaxy mergers identifies a critical orientation near 54.7 degrees separating disruptive from compressive tidal behavior. The authors argue the effect is strongest for diffuse gas and near pericenter, while dense gas remains closer to the classical response. This is a theoretical preprint intended to clarify merger dynamics; it is not a new observation of a named galaxy pair or a direct measurement of star formation.",
    "why_it_matters": "An analytical treatment separates disruptive and compressive tidal regimes in galaxy encounters and predicts where diffuse gas feels the switch most strongly.",
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      "This is a theoretical preprint intended to clarify merger dynamics; it is not a new observation of a named galaxy pair or a direct measurement of star formation."
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        "qualification": "This is a theoretical preprint intended to clarify merger dynamics; it is not a new observation of a named galaxy pair or a direct measurement of star formation."
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    "tags": [
      "galaxy mergers",
      "tidal forces",
      "astrophysics"
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  "sources": [
    {
      "source_id": "source-2026-08-06-015",
      "title": "arXiv preprint 2608.04528",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2608.04528",
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    "title": "A Merger's Tide Flipped at Fifty-Five Degrees",
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