AG Carinae: A Luminous Blue Variable with a High Rotational Velocity

  title={AG Carinae: A Luminous Blue Variable with a High Rotational Velocity},
  author={J. Groh and D. Hillier and A. D. Iagusp and U. Pittsburgh},
  journal={The Astrophysical Journal},
We report the detection of broad absorptions due to Si IV λλ4088-4116 in the luminous blue variable (LBV) AG Carinae during its last hot phase (2001-2003). Our non-LTE spectral analysis, with the radiative transfer code CMFGEN, revealed the photospheric nature of these lines, predicting, however, much narrower and deeper absorption profiles than observed. Using a recently developed code to compute synthetic spectra in two-dimensional geometry allowing for the effects of rotation, we were able… Expand

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