{
  "abstract": "Type I X-ray outbursts in Be/X-ray binaries are commonly associated with enhanced accretion near periastron and are therefore expected in systems with moderate or high orbital eccentricities. KS 1947+300 is an unusual counterexample: despite its nearly circular orbit, it repeatedly exhibits type I outbursts. We investigate its long-term X-ray behavior following the giant outbursts in 2000 and 2013 using RXTE All-Sky Monitor, Swift Burst Alert Telescope, and MAXI monitoring data. We identify 22 type I outbursts and measure their durations, recurrence times, peak intensities, and orbital phases. The durations range from 3.0 to 77.8 days (0.07–1.93 orbital cycles), and the recurrence times range from 46.0 to 129.5 days. The approximate band-limited peak luminosities vary by a factor of 4.5. The full sample is consistent with a broad orbital-phase distribution, whereas the five post-2013 outbursts are concentrated near periastron. Correlation tests show that longer events are systematically brighter, but neither duration nor peak luminosity is significantly correlated with the preceding recurrence time. These observations are compatible with, but do not uniquely establish, a time-dependent eccentric and misaligned Be disk. They highlight the importance of Be-disk evolution in regulating accretion in low-eccentricity Be/X-ray binaries.",
  "abstract_shown": true,
  "affiliations": [
    "Dali University",
    "Institute of Astrophysics",
    "University of Crete",
    "Chinese Academy of Sciences",
    "Jinggangshan University",
    "JingGangShan University",
    "Jiangxi Provincial Key Laboratory of Modern Agricultural Equipment",
    "University of Science and Technology of China"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 9,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Wei Liu",
      "orcid": "0000-0001-7676-6553"
    },
    {
      "affs": [
        1,
        2
      ],
      "name": "Pablo Reig",
      "orcid": "0000-0002-6446-3050"
    },
    {
      "affs": [
        3
      ],
      "name": "Bo Gao"
    },
    {
      "affs": [
        0
      ],
      "name": "Xi Zhang"
    },
    {
      "affs": [
        0
      ],
      "name": "Hongyu Gong",
      "orcid": "0000-0003-2065-2834"
    },
    {
      "affs": [
        4,
        5,
        6
      ],
      "name": "Guangcheng Xiao",
      "orcid": "0000-0002-3718-9252"
    },
    {
      "affs": [
        3,
        7
      ],
      "name": "Xiukun Li",
      "orcid": "0009-0007-7984-5522"
    },
    {
      "affs": [
        0
      ],
      "name": "Zhongmu Li",
      "orcid": "0000-0002-0240-6130"
    },
    {
      "affs": [
        3
      ],
      "name": "Qingzhong Liu",
      "orcid": "0000-0002-1744-1641"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2at00ssqg7d66.bib",
  "cited_by": 0,
  "doi": "10.3847/1538-4357/aea983",
  "fulltext_url": null,
  "id": "2at00ssqg7d66",
  "issns": [
    "0004-637X",
    "1538-4357"
  ],
  "landing_url": "https://iopscience.iop.org/article/10.3847/1538-4357/aea983",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "3103|Astrophysical Phenomena and Observations"
    ]
  ],
  "openalex": "W7223118578",
  "pdf_url": "https://iopscience.iop.org/article/10.3847/1538-4357/aea983/pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-21",
  "publisher": "American Astronomical Society",
  "ris": "https://research.draconitic.com/paper/2at00ssqg7d66.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:11Z",
      "native_id": "10.3847/1538-4357/aea983",
      "source": "crossref",
      "url": "https://iopscience.iop.org/article/10.3847/1538-4357/aea983"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "journal-openalex:3103|Stellar, planetary, and galactic studies",
      "subfield": "stellar"
    }
  ],
  "title": "Unraveling the Mysteries of KS 1947+300: Study of Nonperiodic Type I X-Ray Outbursts after 2000 and 2013",
  "title_text": "Unraveling the Mysteries of KS 1947+300: Study of Nonperiodic Type I X-Ray Outbursts after 2000 and 2013",
  "type": "peer-reviewed",
  "updated_at": "2026-10-30T12:18:11Z",
  "url": "https://research.draconitic.com/paper/2at00ssqg7d66",
  "venue": "The Astrophysical Journal",
  "versions": []
}