{
  "id": "2410.08277",
  "version": "v1",
  "published": "2024-10-10T18:00:03.000Z",
  "updated": "2024-10-10T18:00:03.000Z",
  "title": "The Impact of Classical Bulges on Stellar Bars and Box-Peanut-X-Features in Disk Galaxies",
  "authors": [
    "Rachel Lee McClure",
    "Angus Beane",
    "Elena D'Onghia",
    "Carrie Filion",
    "Kathryne J. Daniel"
  ],
  "comment": "13 pages, 9 figures, Submitted to MNRAS, Comments welcome!",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "Galactic bars and their associated resonances play a significant role in shaping galaxy evolution. Resulting resonance-driven structures, like the vertically extended Boxy/Peanut X-Feature (BPX), then serve as a useful probe of the host galaxy's history. In this study, we quantify the impact of a classical bulge on the evolution of the bar and the growth of bar resonance structures. This is accomplished with a suite of isolated N-body disk galaxy simulations with bulge mass fractions ranging from 0% to 16% of the disk mass. We apply frequency analysis to the stellar orbits to analyze the variations in resonance structure evolution. Our findings indicate that a more massive initial bulge leads to the formation of a stronger and more extended bar and that each bar drives the formation of a prominent associated BPX through resonance passage. In this work, we present evidence that the formation of a BPX is driven by planar, bar-supporting orbits evolving through interaction with horizontal and vertical bar-resonances. More orbits become vertically extended when these resonances overlap, and the rate of the orbits passing through resonance is moderated by the overall fraction of vertically extended orbits. A significant bulge stabilizes the fraction of vertically extended orbits, preventing sudden resonance-induced changes. Crucially, neither sudden resonance overlap nor prolonged resonance trapping is required for BPX formation.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-10-10T18:00:03.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "classical bulge",
      "stellar bars",
      "resonance structure",
      "vertically extended orbits",
      "box-peanut-x-features"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}