{
  "abstract": "GRS 1915+105 is one of the most studied black-hole X-ray binaries, known for its extreme variability and rich phenomenology. Previous studies of this source with the Rossi X-ray Timing Explorer reported a transition of the phase-lags of type-C quasi-periodic oscillations (QPOs) from soft, where low-energy photons lag the high-energy ones, when the QPO frequency is higher than ${\\sim} 2 ~{\\rm Hz}$, to hard when the QPO frequency decreases below ${\\sim} 2 ~{\\rm Hz}$. The hard-lags of the QPO coincide with episodes of strong radio emission. We analyse NICER observations of GRS 1915+105 obtained between 2018 and 2020, during a period in which the source flux decreased steadily, and perform a detailed spectral-timing study of the detected type-C QPOs. We find a type-C QPO with frequencies in the range of ${\\sim} 1.3$-$3.9 ~{\\rm Hz}$, which displays soft lags and, contrary to the RXTE observations, shows no evidence of hard phase lags at frequencies below $2~{\\rm Hz}$. Quasi-simultaneous AMI-LA radio observations show consistently low radio flux (${\\lesssim} 5 ~{\\rm mJy}$) during this period. These results appear to show that the hard QPO lags in GRS 1915+105 are linked to the presence of strong radio activity, suggesting that the relativistic jet is responsible for the hard phase lags, supporting a scenario in which QPO phase lags trace changes in coronal geometry and accretion-ejection coupling in GRS 1915+105.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.15672",
  "author_total": 8,
  "authors": [
    {
      "name": "Candela Bellavita"
    },
    {
      "name": "Mariano Méndez"
    },
    {
      "name": "Federico García"
    },
    {
      "name": "Sara Motta"
    },
    {
      "name": "Pengcheng Yang"
    },
    {
      "name": "Wyncko Tonckens"
    },
    {
      "name": "Liang Zhang"
    },
    {
      "name": "Rob Fender"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/f8fz5vsh3c4m9.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.15672",
  "fulltext_url": null,
  "id": "f8fz5vsh3c4m9",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.15672",
  "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.HE"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.15672",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/f8fz5vsh3c4m9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:25Z",
      "native_id": "2609.15672",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.15672"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    }
  ],
  "title": "Compelling evidence of a link between the lags of the quasi-periodic oscillations and the radio jet in the black-hole X-ray binary GRS 1915+105",
  "title_text": "Compelling evidence of a link between the lags of the quasi-periodic oscillations and the radio jet in the black-hole X-ray binary GRS 1915+105",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:25Z",
  "url": "https://research.draconitic.com/paper/f8fz5vsh3c4m9",
  "venue": "arXiv",
  "versions": []
}