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The Winds of Eta Carinae and Other Very Luminous Stars

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Eta Carinae and the Supernova Impostors

Part of the book series: Astrophysics and Space Science Library ((ASSL,volume 384))

Abstract

The winds of Eta Carinae, other related very luminous stars, and candidate LBVs are reviewed. While ground-based spectra of η Car are influenced by multiple emission regions, HST observations by the Space Telescope Imaging Spectrograph allow us to investigate the primary star’s spectrum in depth; the spectrum that is of its opaque stellar wind. Detailed modeling of the primary star and its dense wind is discussed. We illustrate the influence of the mass-loss rate on the spectrum of the primary star, and show that an accurate estimate for the hydrostatic radius cannot be obtained. Deficiencies in the model are highlighted and we discuss the influence of the binary companion and possible departures of the wind from spherical symmetry. A review of the stellar and wind properties of other very luminous Galactic stars is included to illustrate that η Car is not unique and has some close relatives.

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Acknowledgements

F. Najarro acknowledges support from AYA2008-06166-C03-02 grant. Hillier gratefully acknowledges support from the STScI which has supported the studies of Eta Carinae (GO-08327.03; GO-9420 and GO-9973 programs, HST-AR-10957).

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  1. Departamento de Astrofísica Centro de Astrobiología, CSIC-INTA, Ctra. de Ajalvir a Torrejón km. 4, 28850, Torrejón de Ardoz, Madrid Spain

    Francisco Paco Najarro

  2. University of Pittsburgh, 100 Allen Hall, 3941 O’Hara St., Pittsburgh, PA, 15260, USA

    D. John Hillier

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  1. Francisco Paco Najarro
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Correspondence to Francisco Paco Najarro .

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  1. Dept. Astronomy, University of Minnesota, Church Street SE., 116, Minneapolis, 55455, Minnesota, USA

    Kris Davidson

  2. Dept. Astronomy, University of Minnesota, Church Street SE., 116, Minneapolis, 55455, Minnesota, USA

    Roberta M. Humphreys

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Najarro, F.P., Hillier, D.J. (2012). The Winds of Eta Carinae and Other Very Luminous Stars. In: Davidson, K., Humphreys, R. (eds) Eta Carinae and the Supernova Impostors. Astrophysics and Space Science Library, vol 384. Springer, Boston, MA. https://doi.org/10.1007/978-1-4614-2275-4_4

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