{
  "id": "2406.16631",
  "version": "v1",
  "published": "2024-06-24T13:26:10.000Z",
  "updated": "2024-06-24T13:26:10.000Z",
  "title": "Luminosity Evolution of the Hot Gas in Normal Galaxies from the Near Universe to z=0.5",
  "authors": [
    "Dong-Woo Kim",
    "Giuseppina Fabbiano"
  ],
  "comment": "24 pages, 14 figures, submitted to ApJ",
  "categories": [
    "astro-ph.GA",
    "astro-ph.HE"
  ],
  "abstract": "We explore the evolution of the ~107 degree hot gas in normal galaxies out to redshift = 0.5 (lookback time = 5 Gyr), using X-ray luminosity functions (XLF) built from a sample of 575 normal galaxies with z < 0.6 detected in five high galactic latitude Chandra wide-field surveys. After estimating the emission due to the hot gas component (reducing the sample to ~400 galaxies), we compared the XLF in three redshift bins (z = 0.1, 0.3, and 0.5), finding increases in the number of galaxies per unit co-moving volume from z = 0.1 to 0.3 and then from z = 0.3 to 0.5. These XLF changes suggest a significant (~5s) X-ray luminosity evolution of the hot gas, with LX,GAS decreasing by a factor of 6-10 in the last 5 Gyr (from z = 0.5 to 0.1). The relative abundance of LX,GAS~1041 erg s-1 galaxies at higher z, suggests that high z, moderate LX,GAS galaxies may be the optimal target to solve the missing baryon problem. In early-type galaxies, this observational trend is qualitatively consistent with (but larger than) the expected time-dependent mass-loss rate in cooling flow models without AGN feedback. In late-type galaxies, the observational trend is also qualitatively consistent with (but larger than) the effect of the z-dependent SFR.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2024-06-24T13:26:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "normal galaxies",
      "luminosity evolution",
      "galactic latitude chandra wide-field surveys",
      "high galactic latitude chandra wide-field",
      "x-ray luminosity"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 24,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}