%0 Generic %1 burkert2015angular %A Burkert, A. %A Schreiber, N. M. Förster %A Genzel, R. %A Lang, P. %A Tacconi, L. J. %A Wisnioski, E. %A Wuyts, S. %A Bandara, K. %A Beifiori, A. %A Bender, R. %A Brammer, G. %A Chan, J. %A Davies, R. %A Dekel, A. %A Fabricius, M. %A Fossati, M. %A Kulkarni, S. %A Lutz, D. %A Mendel, J. T. %A Momcheva, I. %A Nelson, E. J. %A Naab, T. %A Renzini, A. %A Saglia, R. %A Sharples, R. M. %A Sternberg, A. %A Wilman, D. %A Wuyts, E. %D 2015 %K angular disks galaxy high-z momentum %T The angular momentum distribution and baryon content of star forming galaxies at z~1-3 %U http://arxiv.org/abs/1510.03262 %X We analyze the angular momenta of massive star forming galaxies (SFGs) at the peak of the cosmic star formation epoch (z~0.8-2.6). Our sample of ~360 log(M*/Msun) ~ 9.3-11.8 SFGs is mainly based on the KMOS^3D and SINS/zC-SINF surveys of H\alpha\ kinematics, and collectively provides a representative subset of the massive star forming population. The inferred halo scale, angular momentum distribution is broadly consistent with that theoretically predicted for their dark matter halos, in terms of mean spin parameter <łambda> ~ 0.037 and its dispersion ($\sigma_log(łambda)$~0.2). Spin parameters correlate with the disk radial scale, and with their stellar surface density, but do not depend significantly on halo mass, stellar mass, or redshift. Our data thus support the long-standing assumption that on average the specific angular momentum of early disks reflects that of their dark matter halos (jd = jDM), despite the fact that gas enters the virial radius with substantially higher angular momentum, requiring subsequent angular momentum redistribution. The lack of correlation between x (jd/jDM) and the nuclear stellar density $\Sigma_*$(1kpc) favors that disk-internal angular momentum redistribution leads to "compaction" inside massive high-z disks. The average disk to dark halo mass ratio is ~5%, consistent with recent abundance matching results and implying that our high-z disks are strongly baryon dominated.

@misc{burkert2015angular, abstract = {We analyze the angular momenta of massive star forming galaxies (SFGs) at the peak of the cosmic star formation epoch (z~0.8-2.6). Our sample of ~360 log(M*/Msun) ~ 9.3-11.8 SFGs is mainly based on the KMOS^3D and SINS/zC-SINF surveys of H\alpha\ kinematics, and collectively provides a representative subset of the massive star forming population. The inferred halo scale, angular momentum distribution is broadly consistent with that theoretically predicted for their dark matter halos, in terms of mean spin parameter <\lambda> ~ 0.037 and its dispersion ($\sigma_{log(\lambda)}$~0.2). Spin parameters correlate with the disk radial scale, and with their stellar surface density, but do not depend significantly on halo mass, stellar mass, or redshift. Our data thus support the long-standing assumption that on average the specific angular momentum of early disks reflects that of their dark matter halos (jd = jDM), despite the fact that gas enters the virial radius with substantially higher angular momentum, requiring subsequent angular momentum redistribution. The lack of correlation between \lambda x (jd/jDM) and the nuclear stellar density $\Sigma_{*}$(1kpc) favors that disk-internal angular momentum redistribution leads to "compaction" inside massive high-z disks. The average disk to dark halo mass ratio is ~5%, consistent with recent abundance matching results and implying that our high-z disks are strongly baryon dominated.}, added-at = {2015-10-13T09:45:34.000+0200}, author = {Burkert, A. and Schreiber, N. M. Förster and Genzel, R. and Lang, P. and Tacconi, L. J. and Wisnioski, E. and Wuyts, S. and Bandara, K. and Beifiori, A. and Bender, R. and Brammer, G. and Chan, J. and Davies, R. and Dekel, A. and Fabricius, M. and Fossati, M. and Kulkarni, S. and Lutz, D. and Mendel, J. T. and Momcheva, I. and Nelson, E. J. and Naab, T. and Renzini, A. and Saglia, R. and Sharples, R. M. and Sternberg, A. and Wilman, D. and Wuyts, E.}, biburl = {https://www.bibsonomy.org/bibtex/269aec8be3c621307c8634b6f1d01dcfe/miki}, description = {[1510.03262] The angular momentum distribution and baryon content of star forming galaxies at z~1-3}, interhash = {9a69414388be171270e7f6908f09f168}, intrahash = {69aec8be3c621307c8634b6f1d01dcfe}, keywords = {angular disks galaxy high-z momentum}, note = {cite arxiv:1510.03262Comment: Submitted to Astrophysical Journal}, timestamp = {2015-10-13T09:45:34.000+0200}, title = {The angular momentum distribution and baryon content of star forming galaxies at z~1-3}, url = {http://arxiv.org/abs/1510.03262}, year = 2015 }