The SAURON project--V. Integral-field emission-line kinematics of 48 elliptical and lenticular galaxies

We present the emission-line fluxes and kinematics of 48 representative elliptical and lenticular galaxies obtained with our custom-built integral-field spectrograph, SAURON, operating on the William Herschel Telescope. Hβ, [O III] λλ.4959,5007 and [N I] λλ5198,5200 emission lines were measured using a new procedure that simultaneously fits both the stellar spectrum and the emission lines. Using this technique we can detect emission lines down to an equivalent width of 0.1 Å set by the current limitations in describing galaxy spectra with synthetic and real stellar templates, rather than by the quality of our spectra. Gas velocities and velocity dispersions are typically accurate to within 14 and 20 km s -1,…

• NA
  National Aeronautics and Space Administration

  Awards: NAS 5-26555, 5-26555
• ST
  Space Telescope Science Institute

  Awards: NAS 5-26555, 5-26555, 26555
• NO
  Nederlandse Organisatie voor Wetenschappelijk Onderzoek
• IN
  Institut national des sciences de l'Univers