HIGH-REDSHIFT STAR-FORMING GALAXIES: ANGULAR MOMENTUM AND BARYON FRACTION, TURBULENT PRESSURE EFFECTS, AND THE ORIGIN OF TURBULENCE

@inproceedings{Burkert2010HIGHREDSHIFTSG,
  title={HIGH-REDSHIFT STAR-FORMING GALAXIES: ANGULAR MOMENTUM AND BARYON FRACTION, TURBULENT PRESSURE EFFECTS, AND THE ORIGIN OF TURBULENCE},
  author={Andreas Burkert and Reinhard Genzel and Nicolas F. Bouche and Giovanni Cresci and Sadegh Khochfar and Jesper Sommer-Larsen and Andris Sternberg and Thorsten Naab and Natasha Foerster-Schreiber and Linda J. Tacconi and Kristen Leah Shapiro and E. van Herwijnen and Dieter Lutz and Roger Davies and Peter Buschkamp and Shy Genel},
  year={2010}
}
The structure of a sample of high-redshift (z ~ 2), rotating galaxies with high star formation rates and turbulent gas velocities of σ ≈ 40-80 km s -1 is investigated. Fitting the observed disk rotational velocities and radii with a Mo et al. (MMW) model requires unusually large disk spin parameters λ d > 0.1 and disk-to-dark halo mass fractions of m d ≈ 0.2, close to the cosmic baryon fraction. The galaxies segregate into dispersion-dominated systems with 1 ≤ υ max /σ ≤ 3, maximum rotational… CONTINUE READING