{
  "id": "2402.18812",
  "version": "v1",
  "published": "2024-02-29T02:37:15.000Z",
  "updated": "2024-02-29T02:37:15.000Z",
  "title": "Partial Tidal Disruption Events by Intermediate-mass Black Holes in Supermassive and Intermediate-mass Black Hole Binaries",
  "authors": [
    "Xiao-Jun Wu",
    "Ye-Fei Yuan",
    "Yan Luo",
    "Wenbin Lin"
  ],
  "comment": "11 pages, 8 figures",
  "doi": "10.1093/mnras/stae641",
  "categories": [
    "astro-ph.HE"
  ],
  "abstract": "In the centers of galaxies, stars that orbit supermassive black hole binaries (SMBHBs) can undergo tidal disruptions due to the Lidov-Kozai mechanism. Nevertheless, most previous researches have predominantly focused on full tidal disruption events (FTDEs). In this study, we employ N-body simulations to investigate partial tidal disruption events (PTDEs) induced by intermediate-mass black holes (IMBHs) in SMBH-IMBH binaries, taking into account consideration the IMBH's mass, semi-major axis, and eccentricity of the outer orbit. Our findings indicate that, in comparison to FTDEs, the majority of tidal disruption events are actually PTDEs. Furthermore, we find that a significant number of stars experiencing partial disruption ultimately get captured by the IMBH, potentially leading to repeating flares. By comparing the period of the periodic eruptions observed in ASASSN-14ko, we find that PTDEs in a specific SMBH-IMBH binary system can align with the observed period if the SMBH has a mass of $10^7\\rm{\\ M_\\odot}$, the IMBH has a mass smaller than approximately $10^5\\rm{\\ M_\\odot}$, the eccentricity of the SMBH-IMBH binary exceeds approximately $0.5$, and the semi-major axis of the SMBH-IMBH binary is larger than approximately $0.001\\rm{\\ pc}$. Moreover, our model effectively accounts for the observed period derivative for ASASSN-14ko ($\\dot{P}=-0.0026\\pm 0.0006$), and our results also imply that some quasi-periodic eruptions may be attributed to PTDEs occurring around SMBH-IMBH binaries.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-02-29T02:37:15.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "partial tidal disruption events",
      "intermediate-mass black hole binaries",
      "smbh-imbh binary",
      "supermassive black hole binaries",
      "experiencing partial disruption"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}