{
  "abstract": "AT2019aalc is considered a repeating tidal disruption event (TDE) candidate occurring in an active galactic nucleus (AGN). In this paper, we highlight previously unnoticed but intriguing features that include a brief optical dimming prior to the rise of the main flare and a significantly lower post-flare luminosity compared to the pre-flare level. By applying a time-dependent obscured TDE model to AT2019aalc, we successfully reproduce its light curves with the tidal disruption of a 1.122−0.176+0.246 main-sequence star by a 1.862−0.259+0.255 × 107 M⊙ supermassive black hole (SMBH). Both the pre-flare dimming and the reduced post-flare luminosity are attributed to obscuration of the intrinsic AGN emission. The total energy of the event derived from our fit is 1.24 × 1051 erg and about 0.2 M⊙ of debris mass is accreted by the SMBH. In addition, the g − r color of the net flare in AT2019aalc exhibits a continuous reddening trend during the first flare, consistent with a gradual increase in E(B − V) predicted by the obscured TDE model. These results suggest that AT2019aalc can be considered a second member of the recently proposed class of obscured TDE candidates hosted in AGNs.",
  "abstract_shown": true,
  "affiliations": [
    "College of Physics and Electronic Engineering, Northwest Normal University",
    "Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 4,
  "authors": [
    {
      "affs": [
        0
      ],
      "name": "Gu Ying",
      "orcid": "0009-0005-6943-7803"
    },
    {
      "affs": [
        1
      ],
      "name": "Li Xiao",
      "orcid": "0009-0001-5037-3855"
    },
    {
      "affs": [
        1
      ],
      "name": "Zhang Xue-Guang"
    },
    {
      "affs": [
        1
      ],
      "name": "Liang En-Wei",
      "orcid": "0000-0002-7044-733X"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5v80xvx2tnkk5.bib",
  "cited_by": 0,
  "doi": "10.1051/0004-6361/202659629",
  "fulltext_url": "https://www.aanda.org/articles/aa/full_html/2026/11/aa59629-26/aa59629-26.html",
  "id": "5v80xvx2tnkk5",
  "issns": [
    "0004-6361",
    "1432-0746"
  ],
  "landing_url": "https://doi.org/10.1051/0004-6361/202659629",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "lcc",
      "QB1-991"
    ],
    [
      "openalex",
      "3103|Astrophysical Phenomena and Observations"
    ]
  ],
  "openalex": "W7213929576",
  "pdf_url": null,
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-04",
  "publisher": "EDP Sciences",
  "ris": "https://research.draconitic.com/paper/5v80xvx2tnkk5.ris",
  "sources": [
    {
      "first_seen": "2026-11-05T14:21:10Z",
      "native_id": "0b3d3da6c1b6439bba661168dec6388f",
      "source": "doaj",
      "url": "https://doi.org/10.1051/0004-6361/202659629"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "journal-openalex:3103|Stellar, planetary, and galactic studies",
      "subfield": "stellar"
    }
  ],
  "title": "AT2019aalc: An obscured tidal disruption event candidate in an active galactic nucleus revealed by its first flare?",
  "title_text": "AT2019aalc: An obscured tidal disruption event candidate in an active galactic nucleus revealed by its first flare?",
  "type": "peer-reviewed",
  "updated_at": "2026-11-06T14:20:38Z",
  "url": "https://research.draconitic.com/paper/5v80xvx2tnkk5",
  "venue": "Astronomy & Astrophysics",
  "versions": []
}