{
  "$schema": "https://themachinepress.com/schemas/story-v1.schema.json",
  "schema_version": "1.0.0",
  "document_type": "machine_press_story",
  "story": {
    "story_id": "mp-2026-09-10-026",
    "source_story_id": "tmp-story-goham-sulfur-giant-planet-formation",
    "edition_id": "mp-2026-09-10-morning-0063",
    "edition_url": "https://themachinepress.com/edition/2026-09-10",
    "position": 15,
    "story_type": "dispatch",
    "section": "research",
    "editorial_classification": "editorial",
    "headline": "A One-Sided Sulfur Arc Marked a Possible New Giant Planet",
    "slug": "a-one-sided-sulfur-arc-marked-a-possible-new-giant-planet",
    "dek": "ALMA mapped localized heating in the edge-on Gomez’s Hamburger disk alongside asymmetry, a disk wind and a gas overdensity.",
    "summary": "ALMA mapped localized heating in the edge-on Gomez’s Hamburger disk alongside asymmetry, a disk wind and a gas overdensity.",
    "body_text": "High-resolution ALMA maps of the edge-on Gomez’s Hamburger disk found a narrow one-sided arc of sulfur monoxide near a previously identified gas overdensity. The authors say the localized heating could surround an early giant protoplanet or a disk fragment. Carbon-monoxide observations also show non-Keplerian emission consistent with a disk wind, while the continuum is asymmetric north to south. A revised distance of 139 plus or minus 24 parsecs places the system near Scorpius–Centaurus. The sulfur chemistry is a candidate tracer, not a direct detection of a planet.",
    "why_it_matters": "ALMA mapped localized heating in the edge-on Gomez’s Hamburger disk alongside asymmetry, a disk wind and a gas overdensity.",
    "limitations": [
      "The sulfur chemistry is a candidate tracer, not a direct detection of a planet."
    ],
    "importance": 8,
    "canonical_url": "https://themachinepress.com/story/mp-2026-09-10-026/a-one-sided-sulfur-arc-marked-a-possible-new-giant-planet",
    "json_url": "https://themachinepress.com/story/mp-2026-09-10-026.json",
    "first_published_at": "2026-09-10T09:00:00.000-04:00",
    "modified_at": "2026-09-10T09:00:00.000-04:00",
    "content_status": "new",
    "is_carryover": false,
    "carryover_reason": null,
    "key_claims": [
      {
        "claim_id": "claim-mp-2026-09-10-026-001",
        "text": "ALMA mapped localized heating in the edge-on Gomez’s Hamburger disk alongside asymmetry, a disk wind and a gas overdensity.",
        "source_ids": [
          "source-2026-09-10-015"
        ],
        "qualification": "The sulfur chemistry is a candidate tracer, not a direct detection of a planet."
      }
    ],
    "source_ids": [
      "source-2026-09-10-015"
    ],
    "tags": [
      "ALMA",
      "protoplanetary disks",
      "planet formation"
    ],
    "image_url": null,
    "corrections": []
  },
  "sources": [
    {
      "source_id": "source-2026-09-10-015",
      "title": "arXiv preprint 2609.09290",
      "publisher": "arXiv",
      "url": "https://arxiv.org/abs/2609.09290",
      "canonical_url": "https://arxiv.org/abs/2609.09290",
      "source_type": "primary_research",
      "is_primary_source": true,
      "published_at": "2026-09-07T20:00:00.000-04:00",
      "accessed_at": "2026-09-10T08:24:00.000-04:00",
      "supports_claim_ids": [
        "claim-mp-2026-09-10-026-001"
      ]
    }
  ],
  "corrections": [],
  "publisher": {
    "name": "The Machine Press",
    "url": "https://themachinepress.com",
    "description": "A daily newspaper for the age of artificial intelligence."
  },
  "cite_this_report": {
    "title": "A One-Sided Sulfur Arc Marked a Possible New Giant Planet",
    "publisher": "The Machine Press",
    "published_at": "2026-09-10T09:00:00.000-04:00",
    "canonical_url": "https://themachinepress.com/story/mp-2026-09-10-026/a-one-sided-sulfur-arc-marked-a-possible-new-giant-planet"
  }
}