{
  "abstract": "We report on the identification of the optical counterpart to the recently discovered millisecond pulsar (MSP) NGC362D in the Galactic globular cluster NGC362 based on deep, multi-band, and multi-epoch Hubble Space Telescope observations. Our analysis robustly shows that this object is a very low-mass ($\\sim0.18 M_{\\odot}$) He white dwarf (WD) still in the pre-cooling phase. Interestingly, a detailed comparison with updated binary evolution models indicates that this object completed the mass-transfer phase only recently ($\\sim0.6$ Gyr ago), thus strongly suggesting that COM-NGC362D is the youngest WD companion to a MSP identified to date. Remarkably, in this respect, the photometric properties of NGC362D show, for the first time in this class of objects, significant wavelength-dependent variations that are consistent with the presence of residual circumstellar material. This system therefore provides a valuable test case to directly probe the immediate aftermath of the MSP recycling process and to constrain the early evolutionary stages of proto-WD companions and their radio and optical properties. Our results suggest that residual material can produce radio and optical signatures that mimic those of systems with non-degenerate companions, potentially leading to the misclassification of young MSPs.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.05608",
  "author_total": 10,
  "authors": [
    {
      "name": "Greta Ettorre"
    },
    {
      "name": "Emanuele Dalessandro"
    },
    {
      "name": "Mario Cadelano"
    },
    {
      "name": "Alessandro Ridolfi"
    },
    {
      "name": "Cristina Pallanca"
    },
    {
      "name": "Paulo C. C. Freire"
    },
    {
      "name": "Vivek Venkatraman Krishnan"
    },
    {
      "name": "Maurizio Salaris"
    },
    {
      "name": "Franca D'Antona"
    },
    {
      "name": "Rouhin Nag"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/e3fgc52e9wwy0.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.05608",
  "fulltext_url": null,
  "id": "e3fgc52e9wwy0",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.05608",
  "language": null,
  "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.GA"
    ],
    [
      "arxiv",
      "astro-ph.HE"
    ],
    [
      "arxiv",
      "astro-ph.SR"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.05608",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-04",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/e3fgc52e9wwy0.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:19:48Z",
      "native_id": "2609.05608",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.05608"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.GA",
      "subfield": "galaxies"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.SR",
      "subfield": "stellar"
    }
  ],
  "title": "The youngest white dwarf companion to a millisecond pulsar: Insights from NGC 362D",
  "title_text": "The youngest white dwarf companion to a millisecond pulsar: Insights from NGC 362D",
  "type": "preprint",
  "updated_at": "2026-10-30T12:19:48Z",
  "url": "https://research.draconitic.com/paper/e3fgc52e9wwy0",
  "venue": "arXiv",
  "versions": []
}