{
  "id": "1505.01837",
  "version": "v1",
  "published": "2015-05-07T19:59:54.000Z",
  "updated": "2015-05-07T19:59:54.000Z",
  "title": "Stellar population synthesis models between 2.5 and 5 μm based on the empirical IRTF stellar library",
  "authors": [
    "B. Röck",
    "A. Vazdekis",
    "R. F. Peletier",
    "J. H. Knapen",
    "J. Falcón-Barroso"
  ],
  "comment": "25 pages, 19 figures, published in MNRAS, models can be downloaded from http://miles.iac.es",
  "journal": "MNRAS 449 (2015) 2853-2874",
  "doi": "10.1093/mnras/stv503",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present the first single-burst stellar population models in the infrared wavelength range between 2.5 and 5 {\\mu}m which are exclusively based on empirical stellar spectra. Our models take as input 180 spectra from the stellar IRTF (Infrared Telescope Facility) library. Our final single-burst stellar population models are calculated based on two different sets of isochrones and various types of initial mass functions of different slopes, ages larger than 1 Gyr and metallicities between [Fe/H] = -0.70 and 0.26. They are made available online to the scientific community on the MILES web page. We analyse the behaviour of the Spitzer [3.6]-[4.5] colour calculated from our single stellar population models and find only slight dependences on both metallicity and age. When comparing to the colours of observed early-type galaxies, we find a good agreement for older, more massive galaxies that resemble a single-burst population. Younger, less massive and more metal-poor galaxies show redder colours with respect to our models. This mismatch can be explained by a more extended star formation history of these galaxies which includes a metal-poor or/and young population. Moreover, the colours derived from our models agree very well with most other models available in this wavelength range. We confirm that the mass-to-light ratio determined in the Spitzer [3.6] {\\mu}m band changes much less as a function of both age and metallicity than in the optical bands.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-05-07T19:59:54.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "stellar population synthesis models",
      "empirical irtf stellar library",
      "first single-burst stellar population models",
      "final single-burst stellar population models"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 25,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}