Characterizing Distant Blue Galaxies with HST Images and Keck Spectra

  • Garth D. Illingworth
Conference paper
Part of the International Astronomical Union / Union Astronomique Internationale book series (IAUS, volume 171)


Keck spectra and HST images have been used to derive characteristic velocity and length scales for an enigmatic component of the faint, blue, field galaxy population: the compact, narrow emission-line galaxies (CNELGs). These galaxies are very luminous, but have been found to be quite low mass systems (with typical masses ~ 109 M). Their blue colors and strong emission lines indicate that they are undergoing a major burst of star formation. Following the completion of their current burst they will fade, becoming, in the absence of further major bursts, objects very similar to contemporary spheroidal galaxies. With mean sizes R e ~ 1.4 kpc and Gaussian velocity profiles with mean σ = 45 km s-1, the length scales and velocity widths of CNELGs are also quite consistent with the measured length scales and velocity widths of current spheroidals.


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Copyright information

© Springer Science+Business Media Dordrecht 1996

Authors and Affiliations

  • Garth D. Illingworth
    • 1
  1. 1.UCO/Lick ObservatoryUniversity of CaliforniaSanta CruzUSA

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