{
  "id": "2407.17570",
  "version": "v1",
  "published": "2024-07-24T18:03:24.000Z",
  "updated": "2024-07-24T18:03:24.000Z",
  "title": "A SPectroscopic survey of biased halos In the Reionization Era (ASPIRE): Broad-line AGN at $z=4-5$ revealed by JWST/NIRCam WFSS",
  "authors": [
    "Xiaojing Lin",
    "Feige Wang",
    "Xiaohui Fan",
    "Zheng Cai",
    "Jaclyn B. Champagne",
    "Fengwu Sun",
    "Marta Volonteri",
    "Jinyi Yang",
    "Joseph F. Hennawi",
    "Eduardo Bañados",
    "Aaron Barth",
    "Anna-Christina Eilers",
    "Emanuele Paolo Farina",
    "Weizhe Liu",
    "Xiangyu Jin",
    "Hyunsung D. Jun",
    "Alessandro Lupi",
    "Koki Kakiichi",
    "Chiara Mazzucchelli",
    "Masafusa Onoue",
    "Zhiwei Pan",
    "Elia Pizzati",
    "Sofía Rojas-Ruiz",
    "Jan-Torge Schindler",
    "Benny Trakhtenbrot",
    "Yue Shen",
    "Maxime Trebitsch",
    "Ming-Yang Zhuang",
    "Ryan Endsley",
    "Romain A. Meyer",
    "Zihao Li",
    "Mingyu Li",
    "Maria Pudoka",
    "Wei Leong Tee",
    "Yunjing Wu",
    "Haowen Zhang"
  ],
  "comment": "19 pages, 13 figures, 4 tables. Accepted by the ApJ",
  "categories": [
    "astro-ph.GA",
    "astro-ph.CO"
  ],
  "abstract": "Low-luminosity AGNs with low-mass black holes (BHs) in the early universe are fundamental to understanding the BH growth and their co-evolution with the host galaxies. Utilizing JWST NIRCam Wide Field Slitless Spectroscopy (WFSS), we perform a systematic search for broad-line ${\\rm H\\alpha}$ emitters (BHAEs) at $z\\approx 4-5$ in 25 fields of the ASPIRE (A SPectroscopic survey of biased halos In the Reionization Era) project, covering a total area of 275 arcmin$^2$. We identify 16 BHAEs with FWHM of the broad components spanning from $\\sim$ 1000 km s$^{-1}$ to 3000 km s$^{-1}$. Assuming the broad linewidths arise due to Doppler broadening around BHs, the implied BH masses range from $10^7$ to $10^{8}~M_\\odot$, with broad ${\\rm H\\alpha}$-converted bolometric luminosity of $10^{44.5}-10^{45.5}$ erg s$^{-1}$ and Eddington ratios of $0.07-0.47$. The spatially extended structure of the F200W stacked image may trace the stellar light from the host galaxies. The ${\\rm H\\alpha}$ luminosity function indicates an increasing AGN fraction towards the higher ${\\rm H\\alpha}$ luminosities. We find possible evidence for clustering of BHAEs: two sources are at the same redshift with a projected separation of 519 kpc; one BHAE appears as a composite system residing in an overdense region with three close companion ${\\rm H\\alpha}$ emitters. Three BHAEs exhibit blueshifted absorption troughs indicative of the presence of high-column-density gas. We find the broad-line and photometrically selected BHAE samples exhibit different distributions in the optical continuum slopes, which can be attributed to their different selection methods. The ASPIRE broad-line ${\\rm H\\alpha}$ sample provides a good database for future studies of faint AGN populations at high redshift.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-07-24T18:03:24.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "reionization era",
      "spectroscopic survey",
      "biased halos",
      "broad-line agn",
      "jwst nircam wide field"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 19,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}