Internal Kinematics of Field Galaxies at Intermediate Redshifts

This paper describes the results of a survey of the internal kinematics of intermediate-redshift (z = 0.25-0.45) field galaxies. Spatially resolved spectra of the [O II] λλ3726, 3729 doublet emission line have been obtained for 22 galaxies at the Canada-France-Hawaii Telescope. High spatial resolution has made it possible to extract Vrot sin i and [O II] disk scale lengths from each galaxy spectrum using synthetic galaxy rotation curve fitting. About 25% of the galaxies in the sample have [O II] kinematics unrelated to rotation. [O II] emission is concentrated in the nucleus in these "kinematically anomalous" galaxies. A Doppler ellipse, similar to those found in local dwarf irregular galaxies, has been observed in a z = 0.35 galaxy. An intermediate-redshift Tully-Fisher (TF) relation, defined by 12 kinematically normal galaxies, shows that these galaxies have a systematically lower rotation velocity (i.e., mass) for their luminosity than expected from the local TF relation. These galaxies would have to fade by ~1.5-2 mag to lie on the local TF relation. This is consistent with starbursting dwarf galaxy models. Although the sample is small, there is also a hint that massive galaxies are not as displaced from the local TF relation as low-mass ones. However, as shown using a large sample of local galaxies, the scatter in the local TF relation is large, especially for late-type galaxies. Sample selection effects, particularly in [O II] emission strength, could be responsible for part of the observed TF evolutionary shift if star formation rates were responsible for the local TF relation scatter. A comparison with other works indicates that a mass-dependent luminosity evolution scenario can explain almost all of the available internal kinematics and surface brightness data.

[1]  R. Carlberg,et al.  The CNOC Cluster Redshift Survey Catalogs. III. MS 1621.5+2640 and MS 0302.7+1658 , 1997 .

[2]  H. Rix,et al.  Internal kinematics of distant field galaxies - I. Emission linewidths for a complete sample of faint blue galaxies at ~0.25 , 1996, astro-ph/9605204.

[3]  R. Carlberg,et al.  The CNOC Cluster Redshift Survey Catalogs. I. Observational Strategy and Data Reduction Techniques , 1996 .

[4]  A. Phillips,et al.  Keck Spectroscopy and HST Imaging of Field Galaxies at Moderate Redshift , 1995, astro-ph/9511014.

[5]  M. Bershady,et al.  High-resolution spectra of distant compact narrow emission line galaxies: Progrenitors of spheroidal galaxies , 1995 .

[6]  R. Wyse,et al.  Observations of the impact of starbursts on the interstellar medium in dwarf galaxies , 1995 .

[7]  J. Gunn,et al.  Generating Colors and K Corrections From Existing Catalog Data , 1994 .

[8]  Rogier A. Windhorst,et al.  REMOVING COSMIC-RAY HITS FROM MULTI-ORBIT HST WIDE FIELD CAMERA IMAGES , 1994 .

[9]  P. Saha,et al.  Unfolding kinematics from galaxy spectra: A Bayesian method , 1994 .

[10]  N. Vogt,et al.  The Rotation Curves of Galaxies at Intermediate Redshift , 1993, astro-ph/9604114.

[11]  D. Mathewson,et al.  A southern sky survey of the peculiar velocities of 1355 spiral galaxies , 1992 .

[12]  R. Davies,et al.  A CRITICAL REVIEW OF SELECTED TECHNIQUES FOR MEASURING EXTRAGALACTIC DISTANCES , 1992 .

[13]  M. Fukugita,et al.  Hubble Flows in the Pisces-Perseus Region from the Giovanelli-Haynes Galaxy Sample , 1992 .

[14]  S. Maddox,et al.  The Stromlo-APM redshift survey. I: The luminosity function and space density of galaxies , 1992 .

[15]  Robert C. Kennicutt,et al.  The Integrated spectra of nearby galaxies: General properties and emission line spectra , 1992 .

[16]  M. Pierce,et al.  Luminosity-line width relations and the extragalactic distance scale. I - Absolute calibration , 1992 .

[17]  R. Ellis,et al.  Faint galaxies: evolution and cosmological curvature , 1992, Nature.

[18]  S. McGaugh,et al.  H II region abundances - Model oxygen line ratios , 1991 .

[19]  N. Metcalfe,et al.  Galaxy number counts - II. CCD observations to B = 25 mag. , 1991 .

[20]  P. Salucci,et al.  The Universal Galaxy Rotation Curve , 1991 .

[21]  P. Fouqué,et al.  The extragalactic distance scale. II. The unbiased distance to the Virgo Cluster from the B-band Tully-Fisher relation , 1990 .

[22]  Richard S. Ellis,et al.  The Durham/Anglo-Australian telescope faint galaxy redshift survey. , 1988 .

[23]  K. Kodaira,et al.  Statistical Study of Inclination Effects on the Internal Absorption on the Surface Photometric Parameters of Disk Galaxies , 1988 .

[24]  R. Brent Tully,et al.  Distances to the Virgo and Ursa Major clusters and a determination of H0 , 1988 .

[25]  Robert I. Jedrzejewski,et al.  CCD surface photometry of elliptical galaxies – I. Observations, reduction and results , 1987 .

[26]  P. Fouqué,et al.  The extragalactic distance scale. I: Corrections to fundamental observables , 1985 .

[27]  David Burstein,et al.  Rotation velocities of 16 SA galaxies and a comparison of Sa, SB and SC rotation properties. , 1985 .

[28]  R. Ellis,et al.  The evolution of spiral galaxies and uncertainties in interpreting galaxy counts. , 1985 .

[29]  J. Huchra,et al.  The distances and properties of a sample of SC I galaxies , 1984 .

[30]  J. Mould,et al.  A distance scale from the infrared magnitude/H I velocity-width relation. IV. The morphological type dependence and scatter in the relation; the distances to nearby groups. , 1983 .

[31]  V. Rubin,et al.  Rotational properties of 23 Sb galaxies , 1982 .

[32]  G. Vaucouleurs,et al.  The 21 centimeter line width as an extragalactic distance indicator. II - Does the Tully-Fisher relation depend on Hubble type , 1982 .

[33]  V. Rubin,et al.  Rotational properties of 21 SC galaxies with a large range of luminosities and radii, from NGC 4605 /R = 4kpc/ to UGC 2885 /R = 122 kpc/ , 1980 .

[34]  M. S. Roberts.  Twenty-one centimeter line widths of galaxies , 1978 .

[35]  James E. Gunn,et al.  A NEW FOUR-COLOR INTERMEDIATE-BAND PHOTOMETRIC SYSTEM. , 1976 .

[36]  N. Metropolis,et al.  Equation of State Calculations by Fast Computing Machines , 1953, Resonance.