{
  "id": "1105.2157",
  "version": "v1",
  "published": "2011-05-11T11:32:24.000Z",
  "updated": "2011-05-11T11:32:24.000Z",
  "title": "Observations of the forward scattering Hanle effect in the Ca i 4227 Å line",
  "authors": [
    "M. Bianda",
    "R. Ramelli",
    "L. S. Anusha",
    "J. O. Stenflo",
    "K. N. Nagendra",
    "R. Holzreuter",
    "M. Sampoorna",
    "H. Frisch",
    "H. N. Smitha"
  ],
  "comment": "4 pages, 5 figures, to be published as a Letter in Astronomy & Astrophysics",
  "categories": [
    "astro-ph.SR"
  ],
  "abstract": "Chromospheric magnetic fields are notoriously diffcult to measure. The chromospheric lines are broad, while the fields are producing a minuscule Zeeman-effect polarization. A promising diagnostic alternative is provided by the forward-scattering Hanle effect, which can be recorded in chromospheric lines such as the He i 10830 {\\AA} and the Ca i 4227 {\\AA} lines. We present a set of spectropolarimetric observations of the full Stokes vector obtained near the center of the solar disk in the Ca i 4227 {\\AA} line with the ZIMPOL polarimeter at the IRSOL observatory.We detect a number of interesting forward-scattering Hanle effect signatures, which we model successfully using polarized radiative transfer. Here we focus on the observational aspects, while a separate companion paper deals with the theoretical modeling.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-05-11T11:32:24.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "forward scattering hanle effect",
      "observations",
      "separate companion paper deals",
      "chromospheric lines",
      "interesting forward-scattering hanle effect signatures"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1051/0004-6361/201117047",
      "journal": "Astronomy and Astrophysics",
      "year": 2011,
      "month": "Jun",
      "volume": 530
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 899244,
      "adsabs": "2011A&A...530L..13B"
    }
  }
}