{
  "abstract": "Primordial non-Gaussianity (PNG) is a fundamental probe of the physics of the early Universe and inflation. Here we present a comprehensive study of the constraints on the local-type PNG parameter, $f_{\\rm NL}$, for the spectroscopic galaxy survey of the upcoming Chinese Space-station Survey Telescope (CSST). Utilizing the high-resolution Jiutian N-body simulation suite, we construct realistic mock catalogs for emission line galaxies (ELGs) at three representative redshifts $z=0.3$, 0.6, and 0.9. The expected CSST observational characteristics are also considered, including redshift uncertainties and selection functions based on signal-to-noise ratios of emission lines. We develop a robust analysis framework for the redshift-space galaxy power spectrum and bispectrum that accounts for redshift-space distortions, scale-dependent bias, and nonlinear effects. For the parameter $p$ in the PNG bias $b_ϕ$ with $p=0.55$, we find $f_{\\rm NL}=-4\\pm43$ if only using the power spectrum data, and $f_{\\rm NL}=3\\pm41$ after combining the bispectrum data, reducing the uncertainty by $\\sim$5%.For the $p=1$ case, the constraint results are $f_{\\rm NL}=-3\\pm86$ and $54^{+70}_{-80}$ for comparison. This work demonstrates the potential of the Stage IV surveys like CSST to probe inflationary physics, and highlights the importance of higher-order statistics in extracting information from large-scale structure surveys.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.18744",
  "author_total": 9,
  "authors": [
    {
      "name": "Jiangnan Duan"
    },
    {
      "name": "Yan Gong"
    },
    {
      "name": "Qi Xiong"
    },
    {
      "name": "Haitao Miao"
    },
    {
      "name": "Xuelei Chen"
    },
    {
      "name": "Qi Guo"
    },
    {
      "name": "Ming Li"
    },
    {
      "name": "Yun Liu"
    },
    {
      "name": "Wenxiang Pei"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/deby78hvqga6k.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.18744",
  "fulltext_url": null,
  "id": "deby78hvqga6k",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.18744",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.CO"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7165165389",
  "pdf_url": "https://arxiv.org/pdf/2606.18744",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-31",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/deby78hvqga6k.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:58Z",
      "native_id": "2606.18744",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.18744"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    }
  ],
  "title": "Predicting Primordial Non-Gaussianity Measurements in the CSST Spectroscopic Survey",
  "title_text": "Predicting Primordial Non-Gaussianity Measurements in the CSST Spectroscopic Survey",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:17Z",
  "url": "https://research.draconitic.com/paper/deby78hvqga6k",
  "venue": "arXiv",
  "versions": []
}