{
  "abstract": "AM CVn stars are ultra-compact, semi-detached binaries consisting of a white dwarf primary and a hydrogen-poor secondary. In this work, we analyse the AM CVn-type systems MGAB-V270, ZTF18aaxuusk and ASASSN-19ct, which have similar properties and show unusual post-superoutburst behaviour. We focus on the occurrence of standstill-like phases. In MGAB-V270, superoutbursts are followed by a series of echo outbursts that evolves into a standstill-like phase before the system returns to quiescence. ZTF18aaxuus shows similar post-superoutburst activity, with one echo-outburst series also developing into a standstill-like phase. ASASSN-19ct exhibits comparable echo outbursts but no standstill-like phases. Periodicity analysis using TESS data shows that superhumps can persist during both echo outbursts and standstill-like phases. Although standstills have previously been observed in AM CVn stars, the standstill-like phases we observe appear to represent a distinct phenomenon associated with post-superoutburst activity. We compare our results to other AM CVns that may exhibit similar behaviour.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.19105",
  "author_total": 6,
  "authors": [
    {
      "name": "Jan Kára"
    },
    {
      "name": "Liliana Rivera Sandoval"
    },
    {
      "name": "Iwona Kotko"
    },
    {
      "name": "Jean-Marie Hameury"
    },
    {
      "name": "Luis E. Salazar Manzano"
    },
    {
      "name": "Ryan J. Oelkers"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/c4j6gz3ea4q46.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.19105",
  "fulltext_url": null,
  "id": "c4j6gz3ea4q46",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.19105",
  "language": "en",
  "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.HE"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ],
    [
      "hal",
      "0.phys"
    ],
    [
      "hal",
      "1.phys.astr"
    ],
    [
      "openalex",
      "3103|Stellar, planetary, and galactic studies"
    ]
  ],
  "openalex": "W7222179410",
  "pdf_url": "https://arxiv.org/pdf/2610.19105",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/c4j6gz3ea4q46.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:31Z",
      "native_id": "2610.19105",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.19105"
    },
    {
      "first_seen": "2026-11-04T12:20:53Z",
      "native_id": "hal-05851456",
      "source": "hal",
      "url": "https://hal.science/hal-05851456v1"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    },
    {
      "field": "physics",
      "origin": "hal:0.phys",
      "subfield": "general"
    }
  ],
  "title": "A Distinct Type of Standstill in Ultra-Compact White Dwarf Binaries",
  "title_text": "A Distinct Type of Standstill in Ultra-Compact White Dwarf Binaries",
  "type": "preprint",
  "updated_at": "2026-11-06T12:20:44Z",
  "url": "https://research.draconitic.com/paper/c4j6gz3ea4q46",
  "venue": "arXiv",
  "versions": []
}