{
  "abstract": "We present a comprehensive spectroscopic census of the Orion Nebula Cluster (ONC), based primarily on low-resolution optical spectroscopy obtained with MMT/Hectospec. We derive spectral types, youth indicators, and accretion diagnostics for 1513 stars located in the ONC region, enabling the identification and characterization of pre–main-sequence stars. We combine these measurements with a kinematic membership analysis based on Gaia Data Release 3 astrometry to identify and confirm cluster members. Using these combined diagnostics, we identify and characterize 780 bona fide T Tauri stars associated with the ONC. In addition, we construct a census of protoplanetary discs using infrared photometry obtained with the IRAC and MIPS instruments aboard the Spitzer Space Telescope. We further derive stellar masses, ages, and extinctions using the MassAge code, which combines photometric and spectroscopic inputs with stellar evolutionary models, and employs a Monte Carlo approach for uncertainty propagation. The resulting homogeneous catalogue of ONC members provides spectroscopic characterizations, kinematic membership constraints, disc diagnostics, and self-consistent estimates of stellar physical parameters. This dataset offers a refined view of the stellar population of the ONC and provides a robust foundation for investigating its kinematic structure, age distribution, and protoplanetary disc population.",
  "abstract_shown": true,
  "affiliations": [
    "Instituto de Astronomía, Universidad Nacional Autónoma de México , Apartado Postal 106, C. P. 22800, Ensenada, B. C. ,",
    "University of Michigan Department of Astronomy, , 1085 South University Avenue, Ann Arbor, MI 48109 ,",
    "Universidad de La Serena Departamento de Astronomía, , 1700000 La Serena ,",
    "SOAR Telescope/NSF NOIRLab , Casilla 603, La Serena ,",
    "University of Oklahoma Homer L. Dodge Department of Physics and Astronomy, , Norman, OK 73019 ,",
    "Observatorio Astronómico Nacional, Facultad de Ciencias, Universidad Nacional de Colombia , Bogotá ,",
    "University of Toledo Ritter Astrophysical Research Center, Department of Physics and Astronomy, , Toledo OH, 43606 ,",
    "National Radio Astronomy Observatory , 520 Edgemont Road, Charlottesville, VA 22903 ,",
    "Universidad de los Andes , Departamento de Física, Cra. 1 No. 18A-10, Bloque Ip, A.A. 4976 Bogotá ,",
    "Instituto de Radioastronomía y Astrofísica , UNAM, campus Morelia. PO Box 3-72. 58090. Morelia, Michoacán ,",
    "NSF NOIRLab , 950 N. Cherry Ave., Tucson, AZ 85719 ,",
    "Boston University Department of Astronomy, , 725 Commonwealth Avenue, Boston, MA 02215 ,",
    "Universidad Pedagógica y Tecnológica de Colombia . Sede Central Tunja - Boyacá -"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 24,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Jesús Hernández"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Ezequiel Manzo-Martínez"
    },
    {
      "affs": [
        0
      ],
      "name": "Lucía Adame"
    },
    {
      "affs": [
        0
      ],
      "name": "Sergio Sánchez-Sanjuán"
    },
    {
      "affs": [
        1
      ],
      "name": "Nuria Calvet"
    },
    {
      "affs": [
        2
      ],
      "name": "David Fernandez"
    },
    {
      "affs": [
        3
      ],
      "name": "Cesar Briceno"
    },
    {
      "affs": [
        4
      ],
      "name": "Javier Serna"
    },
    {
      "affs": [
        5
      ],
      "name": "Giovanni Pinzón"
    },
    {
      "affs": [
        0
      ],
      "name": "Lucia Martinez"
    },
    {
      "affs": [
        6
      ],
      "name": "Tom Megeath"
    },
    {
      "affs": [
        7
      ],
      "name": "John J Tobin",
      "orcid": "0000-0002-6195-0152"
    },
    {
      "affs": [
        0
      ],
      "name": "Carlos Román-Zuñiga"
    },
    {
      "affs": [
        0
      ],
      "name": "Karina Maucó"
    },
    {
      "affs": [
        0
      ],
      "name": "Corina Zepeda"
    },
    {
      "affs": [
        8
      ],
      "name": "Andrea Bonilla-Barroso"
    },
    {
      "affs": [
        8
      ],
      "name": "Maria Gracia Batista"
    },
    {
      "affs": [
        9
      ],
      "name": "Javier Ballesteros-Paredes",
      "orcid": "0000-0002-1081-9445"
    },
    {
      "affs": [
        10
      ],
      "name": "Lori Allen"
    },
    {
      "affs": [
        11
      ],
      "name": "Luisa Zamudio-Ruvalcaba"
    },
    {
      "affs": [
        2
      ],
      "name": "Fabian Ahumada"
    },
    {
      "affs": [
        12
      ],
      "name": "Alejandro Alfonso"
    },
    {
      "affs": [
        5
      ],
      "name": "Johana Contreras"
    },
    {
      "affs": [
        5
      ],
      "name": "Jhordan Peña"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/db9w07m046sxd.bib",
  "cited_by": 0,
  "doi": "10.1093/mnras/stag2013",
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  "id": "db9w07m046sxd",
  "issns": [
    "0035-8711",
    "1365-2966"
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  "language": null,
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  "licence_label": "CC BY 4.0",
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  "pdf_url": "https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stag2013/72655255/stag2013.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-31",
  "publisher": "Oxford University Press (OUP)",
  "ris": "https://research.draconitic.com/paper/db9w07m046sxd.ris",
  "sources": [
    {
      "first_seen": "2026-11-01T00:20:40Z",
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  "subjects": [
    {
      "field": "astronomy",
      "origin": "journal-openalex:3103|Stellar, planetary, and galactic studies",
      "subfield": "stellar"
    }
  ],
  "title": "A Hectospec Spectroscopic Census of Kinematic Members in the Orion Nebula Cluster",
  "title_text": "A Hectospec Spectroscopic Census of Kinematic Members in the Orion Nebula Cluster",
  "type": "peer-reviewed",
  "updated_at": "2026-11-02T00:20:49Z",
  "url": "https://research.draconitic.com/paper/db9w07m046sxd",
  "venue": "Monthly Notices of the Royal Astronomical Society",
  "versions": []
}