{
  "id": "2106.14525",
  "version": "v1",
  "published": "2021-06-28T10:07:57.000Z",
  "updated": "2021-06-28T10:07:57.000Z",
  "title": "The eROSITA Final Equatorial-Depth Survey (eFEDS): The first archetypal Quasar in the feedback phase discovered by eROSITA",
  "authors": [
    "M. Brusa",
    "T. Urrutia",
    "Y. Toba",
    "J. Buchner",
    "J. -Y. Li",
    "T. Liu",
    "M. Perna",
    "M. Salvato",
    "A. Merloni",
    "B. Musiimenta",
    "K. Nandra",
    "J. Wolf",
    "R. Arcodia",
    "T. Dwelly",
    "A. Georgakakis",
    "A. Goulding",
    "Y. Matsuoka",
    "T. Nagao",
    "M. Schramm",
    "J. D. Silverman",
    "Y. Terashima"
  ],
  "comment": "11 pages, 6 figures, 2 tables. Resubmitted to A&A for the Special Issue: \"The Early Data Release of eROSITA and Mikhail Pavlinsky ART-XC on the SRG Mission\"",
  "categories": [
    "astro-ph.HE",
    "astro-ph.GA"
  ],
  "abstract": "Theoretical models of galaxy-AGN co-evolution ascribe an important role for the feedback process to a short, luminous, obscured, and dust-enshrouded phase during which the accretion rate of the SMBH is expected to be at its maximum and the associated AGN-driven winds are also predicted to be maximally developed. To test this scenario, we have isolated a text-book candidate from the eROSITA Final Equatorial-Depth Survey (eFEDS) obtained within the Performance and Verification program of the eROSITA telescope on board Spectrum Roentgen Gamma. From an initial catalog of 246 hard X-ray selected sources matched with the photometric and spectroscopic information available within the eROSITA and Hyper Suprime-Cam consortia, three candidates Quasars in the feedback phase have been isolated applying the diagnostic proposed in Brusa et al. (2015). Only one source (eFEDSU J091157.5+014327) has a spectrum already available (from SDSS-DR16, z=0.603) and it unambiguously shows the presence of a broad component (FWHM~1650 km/s) in the [OIII]5007 line. The associated observed L_[OIII] is ~2.6x10^{42} erg/s, one to two orders of magnitude larger than that observed in local Seyferts and comparable to those observed in a sample of z~0.5 Type 1 Quasars. From the multiwavelength data available we derive an Eddington Ratio (L_bol/L_Edd) of ~0.25, and a bolometric correction in the hard X-ray of k_bol~10, lower than those observed for objects at similar bolometric luminosity. The presence of an outflow, the high X-ray luminosity and moderate X-ray obscuration (L_X~10^44.8 erg/s, N_H~2.7x10^22 cm^-2) and the red optical color, all match the prediction of quasars in the feedback phase from merger driven models. Forecasting to the full eROSITA all-sky survey with its spectroscopic follow-up, we predict that by the end of 2024 we will have a sample of few hundreds such objects at z=0.5-2.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2021-06-28T10:07:57.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "erosita final equatorial-depth survey",
      "feedback phase",
      "first archetypal quasar",
      "x-ray selected sources",
      "full erosita all-sky survey"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 11,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}