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Parametric relations of H II galaxies

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Abstract

The integrated Hβ luminosities of giant H II regions and of H II galaxies can be predicted with accuracy comparable to the observational errors from the velocity widths of their emissionline profiles. In addition, giant H II regions also present a relation between linear size and their emission-line width. Based on the similarity of these relations with those expected for virialized systems, Terlevich and Melnick interpreted the observedsupersonic motions as due to the gravitational potential of a complex of gas and stars.

We show that H II galaxies also present a relation between linear size and their emission-line width, which supports the gravitating model. We also show that the scatter in the luminosity-line width relation for H II galaxies seems to be correlated with linear size and compare the results with the “fundamental plane” for elliptical galaxies from Dressleret al. (1987).

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Authors and Affiliations

  1. Institute of Astronomy, Madingley Road, Cambridge, U.K.

    E. Telles

  2. Royal Greenwich Observatory, Cambridge, U.K.

    E. Telles

  3. Royal Greenwich Observatory, Cambridge, U.K.

    R. Terlevich

Authors
  1. E. Telles
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  2. R. Terlevich
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Telles, E., Terlevich, R. Parametric relations of H II galaxies. Astrophys Space Sci 205, 49–55 (1993). https://doi.org/10.1007/BF00657956

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  • DOI: https://doi.org/10.1007/BF00657956

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