{
  "annotation_id": "ade4ee29-eddb-4bc2-a1be-1b71e9dae18b",
  "date_created": "2026-02-17T05:53:12.641000Z",
  "date_modified": "2026-02-17T05:53:12.641000Z",
  "file_hash": "a62771c795a9068def15ddc3689d12c9be304837b3b16616e4ee707d8cb6eee3",
  "private": false,
  "record": {
    "abstract": "We search for galaxy-scale (Dysonian) waste heat in the mid-infrared using WISE. Starting from the 2MASS Redshift Survey (2MRS), we cross-match to CatWISE2020 and AllWISE, apply standard MIR AGN/starburst vetoes (Stern, Assef R90, Jarrett), and treat W1 and W2 as stellar baselines and W3 and W4 as constraining bands. For each galaxy and for blackbody waste heat temperatures T=150-600 K, we convert W3/W4 photometry into conservative 3-sigma per-galaxy upper limits on the bolometric waste heat luminosity using the WISE bandpass (RSR) color correction. The resulting distributions have median caps of ~(5-9) x 10^8 L_sun across T=150-600 K. Aggregated at the population level, the one-sided 95% upper bound on the fraction of nearby galaxies that could host waste heat above a given threshold monotonically decreases with threshold and asymptotes to ~1/6500 at high thresholds (set by the sample size). Sensitivity transitions from W4 at T \u003c= 200K to W3 at T \u003e= 300K. Interpreted with the AGENT formalism, a fiducial Milky Way like stellar luminosity L_=3 x 10^10 L_sun implies typical per galaxy caps of alpha = L_wh/L_ \u003c= 1.7-2.9% over T=150-600 K (e.g., alpha \u003c= 1.8% at T=300 K). At T ~= 300K, no more than f_95 ~= 1.61 x 10^-4 (~= 0.0161%) of nearby galaxies can host KIII-scale systems reprocessing \u003e= 21% of a Milky Way-like stellar luminosity into ~ 300K waste heat.",
    "arxiv_id": "2601.07297",
    "authors": [
      "Bo-Lun Huang",
      "Zhen-Zhao Tao",
      "Tong-Jie Zhang"
    ],
    "categories": [
      "astro-ph.GA"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "title": "WISE/CatWISE Constraints on Dysonian Waste-Heat Technosignatures in Nearby Galaxies",
    "url": "https://arxiv.org/abs/2601.07297",
    "version": "v1"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "097cab75-ca18-4489-aa6b-c6e9549ab9e4",
    "id": "arXiv Dataset",
    "type": "Model",
    "variant": "snapshot-2026-01-17",
    "version": "0.1.0"
  },
  "user_id": 1000002
}