{
  "id": "1504.08001",
  "version": "v1",
  "published": "2015-04-29T20:01:34.000Z",
  "updated": "2015-04-29T20:01:34.000Z",
  "title": "The BaLROG project - I. Quantifying the influence of bars on the kinematics of nearby galaxies",
  "authors": [
    "M. K. Seidel",
    "J. Falcón-Barroso",
    "I. Martínez-Valpuesta",
    "S. Díaz-García",
    "E. Laurikainen",
    "H. Salo",
    "J. H. Knapen"
  ],
  "comment": "38 pages, 40 figures, accepted for publication in MNRAS, comments are welcome. Some of the figures might lack quality here due to overall size restrictions, please contact us if needed",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present the BaLROG (Bars in Low Redshift Optical Galaxies) sample of 16 morphologically distinct barred spirals to characterise observationally the influence of bars on nearby galaxies. Each galaxy is a mosaic of several pointings observed with the IFU spectrograph SAURON leading to a tenfold sharper spatial resolution (~100 pc) compared to ongoing IFU surveys. In this paper we focus on the kinematic properties. We calculate the bar strength Qb from classical torque analysis using 3.6 {\\mu}m Spitzer (S4G) images, but also develop a new method based solely on the kinematics. A correlation between the two measurements is found and backed up by N-body simulations, verifying the measurement of Qb . We find that bar strengths from ionised gas kinematics are ~2.5 larger than those measured from stellar kinematics and that stronger bars have enhanced influence on inner kinematic features. We detect that stellar angular momentum \"dips\" at 0.2$\\pm$0.1 bar lengths and half of our sample exhibits an anti-correlation of h3 - stellar velocity (v/{\\sigma}) in these central parts. An increased flattening of the stellar {\\sigma} gradient with increasing bar strength supports the notion of bar-induced orbit mixing. These measurements set important constraints on the spatial scales, namely an increasing influence in the central regions (0.1-0.5 bar lengths), revealed by kinematic signatures due to bar-driven secular evolution in present day galaxies.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2015-04-29T20:01:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "nearby galaxies",
      "balrog project",
      "bar lengths",
      "measurements set important constraints",
      "tenfold sharper spatial resolution"
    ],
    "publication": {
      "doi": "10.1093/mnras/stv969"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 38,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 1365610
    }
  }
}