{
  "abstract": "Close binaries with active chromospheres have recently been shown to emit circularly polarised radio emission at low frequencies, motivating detailed studies of their orbital properties. We present high-resolution ($R=85,000$) optical spectroscopy of TYC 2834-1385-1, a previously unclassified radio source, obtained with the HERMES spectrograph on the Mercator Telescope. We identify the source as a double-lined spectroscopic binary and measure radial velocities from both metallic absorption and Ca II emission lines. We find an orbital period of $P=3.601\\pm0.002$ days and nearly equal radial-velocity semi-amplitudes for the two components. The system exhibits strong Ca II H and K emission, which is consistent with a BY Dra-type binary containing two similar late-G/early-K main-sequence stars, with a preliminary classification of K0V. This represents one of the first spectroscopic confirmations of a chromospherically active binary following its identification in a low-frequency radio survey.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Tamara A. S. Bleeker et al 2026 Res. Notes AAS 10 272",
  "arxiv": "2609.26849",
  "author_total": 5,
  "authors": [
    {
      "name": "Tamara A. S. Bleeker"
    },
    {
      "name": "Alexander Hoogerbrug"
    },
    {
      "name": "Elise Koo"
    },
    {
      "name": "Rudy Wijnands"
    },
    {
      "name": "Joseph R. Callingham"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7w748ar9y7jca.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.26849",
  "fulltext_url": null,
  "id": "7w748ar9y7jca",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.26849",
  "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.SR"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.26849",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7w748ar9y7jca.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:56Z",
      "native_id": "2609.26849",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.26849"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "Spectroscopic Study of the Circularly Polarised Radio Source TYC 2834-1385-1: An Active Binary",
  "title_text": "Spectroscopic Study of the Circularly Polarised Radio Source TYC 2834-1385-1: An Active Binary",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:56Z",
  "url": "https://research.draconitic.com/paper/7w748ar9y7jca",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.3847/2515-5172/aea8ed",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}