{
  "abstract": "We aim to investigate the multi-wavelength variability, spectral, and timing properties of the changing-look active galactic nucleus (CL AGN) SDSS J1430+2303, and to explore the physical origin of its peculiar variability pattern that has not been observed before in other CL AGN. We perform a multi-wavelength analysis using optical, ultraviolet, and X-ray observations. We investigate the long-term optical color variation, characterize the evolution of the X-ray spectrum and timing properties, and construct broad-band spectral energy distributions to constrain the black hole mass, spin, and Eddington ratio. The optical flux increased by an order of magnitude over four years, accompanied by a spectral transition from Seyfert 1.9 to 1.2. The long-term color variation follows the ``bluer-when-brighter'' trend, with a color-magnitude slope consistent with previous statistical results for CL and Type 1 AGNs. During the brightened high state, the optical, ultraviolet, and X-ray light curves exhibited rapid decaying periods with progressively decreasing amplitudes, a behavior not previously reported in other CL AGNs. X-ray spectral analysis reveals a remarkably weak soft excess that declines more steeply than the hard X-rays as the total luminosity decreases. X-ray timing analysis shows a nearly constant break frequency and a hard lag at $\\sim10^{-4}$ Hz during the luminosity decline, suggesting a stable disk--corona geometry. Broad-band spectral energy distribution fitting constrains the black hole mass to $M_{\\rm BH}=3.8-19.5\\times10^7\\,M_\\odot$ and favors a high spin ($a\\gtrsim0.77$), while the correspondingly low Eddington ratio can account for the observed weak soft excess. We propose that the observed multi-wavelength decaying periods and their progressively decreasing amplitudes are associated with a shrinking unstable zone driven by radiation-pressure instability in the accretion disk.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2606.06802",
  "author_total": 6,
  "authors": [
    {
      "name": "Han He"
    },
    {
      "name": "Bei You"
    },
    {
      "name": "Marzena Śniegowska"
    },
    {
      "name": "Bożena Czerny"
    },
    {
      "name": "Claudio Ricci"
    },
    {
      "name": "Xinwu Cao"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/75mjf25ky5ytk.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2606.06802",
  "fulltext_url": null,
  "id": "75mjf25ky5ytk",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2606.06802",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "astro-ph.GA"
    ],
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "openalex",
      "3103|Astrophysical Phenomena and Observations"
    ]
  ],
  "openalex": "W7163911416",
  "pdf_url": "https://arxiv.org/pdf/2606.06802",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-16",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/75mjf25ky5ytk.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:01Z",
      "native_id": "2606.06802",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2606.06802"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Radiation Pressure Instability in the \"turn-on\" Changing-Look AGN SDSS J1430+2303",
  "title_text": "Radiation Pressure Instability in the \"turn-on\" Changing-Look AGN SDSS J1430+2303",
  "type": "preprint",
  "updated_at": "2026-10-30T12:22:01Z",
  "url": "https://research.draconitic.com/paper/75mjf25ky5ytk",
  "venue": "arXiv",
  "versions": []
}