{
  "id": "astro-ph/0406523",
  "version": "v1",
  "published": "2004-06-23T17:50:59.000Z",
  "updated": "2004-06-23T17:50:59.000Z",
  "title": "The Systemic Velocity of Eta Carinae",
  "authors": [
    "Nathan Smith"
  ],
  "comment": "4 pages, published in MNRAS",
  "journal": "Mon.Not.Roy.Astron.Soc. 351 (2004) L15",
  "doi": "10.1111/j.1365-2966.2004.07943.x",
  "categories": [
    "astro-ph"
  ],
  "abstract": "High-resolution spectra of molecular hydrogen in the Homunculus nebula allow for the first direct measurement of the systemic velocity of Eta Carinae. Near-infrared long-slit data for H2 1-0 S(1) lambda 21218 obtained with the Phoenix spectrometer on the Gemini South telescope give Vsys=-8.1pm1 km/s (heliocentric), or VLSR=-19.7pm1 km/s, from the average of the near and far sides of the Homunculus. This measurement considerably improves the precision for the value of -7pm10 km/s inferred from neighboring O-type stars in the Carina nebula. New near-infrared spectra also provide a high-resolution line profile of [Fe II] lambda 16435 emission from gas condensations known as the Weigelt objects without contamination from the central star, revealing a line shape with complex kinematic structure. Previously, uncertainty in the Weigelt knots' kinematics was dominated by the adopted systemic velocity of Eta Car.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2004-06-23T17:50:59.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "systemic velocity",
      "eta carinae",
      "complex kinematic structure",
      "gemini south telescope",
      "first direct measurement"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "Wiley-Blackwell",
      "journal": "J. Finance"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 652952
    }
  }
}