Multiresolution angular momentum measurements of z~1.5-2 star-forming galaxies

Abstract

We present detailed stellar specific angular momentum ($j_{\ast }$) measurements of ten star-forming galaxies at $z\sim 1.5-2$ using both high and low spatial resolution integral field spectroscopic data. We developed a code that simultaneously models the adaptive optics (AO) assisted observations from OSIRIS/SINFONI along with their natural seeing (NS) counterparts from KMOS at spatial resolutions of [$0.1-0.4$] arcsec and [$0.6-1.0$] arcsec respectively. The AO data reveals 2/10 systems to be mergers and for the remaining eight the mean uncertainties $\bar{\Delta }{j}_{\ast }$ decrease from 49% (NS), and 26.5% (AO), to 16% in the combined analysis. These $j_{\ast }$ measurements agree within 20% with simple estimates ($\widetilde{j_{\ast }}$) calculated from the Hubble Space Telescope photometry and NS kinematics, however higher resolution kinematics are required to first identify these disks. We find that the choice of surface mass density model and the measurement of effective radius from photometry are the key sources of systematic effects in the measurement of $j_{\ast }$ between different analyses. Fitting the $j_{\ast }$ vs $M_{\ast }$ relations (Fall, 1983) with a fixed power-law slope of $\beta =2/3$, we find a zero-point consistent with prior NS results at $z\ge 1$ within $\sim 0.3$ dex. Finally, we find a $\sim 0.38$ dex scatter about that relation that remains high despite the AO data so we conclude it is intrinsic to galaxies at $z>1$. This compares to a scatter of $\le 0.2$ dex for disks at $z\simeq 0$ pointing to a settling of the Fall relation with cosmic time.

29 pages (21 for the paper and 8 for a supplementary section), 31 figures. Published in Monthly Notices of the Royal Astronomical Society

References in corpus (32)

• The NumPy array: a structure for efficient numerical computation
• Cosmic Star Formation History
• The UKIRT Infrared Deep Sky Survey (UKIDSS)
• The Cosmic Evolution Survey (COSMOS) -- Overview
• 3D-HST+CANDELS: The Evolution of the Galaxy Size-Mass Distribution since $z=3$
• Formation of Massive Galaxies at High Redshift: Cold Streams, Clumpy Disks and Compact Spheroids
• High-Resolution Rotation Curves and Galaxy Mass Models from THINGS
• The MUSE second-generation VLT instrument
• From rings to bulges: evidence for rapid secular galaxy evolution at z~2 from integral field spectroscopy in the SINS survey
• The KMOS^3D Survey: design, first results, and the evolution of galaxy kinematics from 0.7<z<2.7
• The rapid formation a large rotating disk galaxy three billion years after the Big Bang
• CMasher: Scientific colormaps for making accessible, informative and 'cmashing' plots
• Dynamical Properties of z~2 Star Forming Galaxies and a Universal Star Formation Relation
• The SAMI Galaxy Survey: the link between angular momentum and optical morphology
• Resolved spectroscopy of gravitationally lensed galaxies: global dynamics and star-forming clumps on ~100pc scales
• The KMOS^3D Survey: data release and final survey paper
• Kinematic modelling of disk galaxies I. A new method to fit tilted rings to data cubes
• Integral Field Spectroscopy of High-Redshift Star Forming Galaxies with Laser Guided Adaptive Optics: Evidence for Dispersion-Dominated Kinematics
• z~2: An Epoch of Disk Assembly
• DYNAMO-HST Survey: Clumps in Nearby Massive Turbulent Disks and the Effects of Clump Clustering on Kiloparsec Scale Measurements of Clumps
• The KMOS Redshift One Spectroscopic Survey (KROSS): rotational velocities and angular momentum of z~0.9 galaxies
• Morphological evolution of galaxies from ultradeep HST WFC3 imaging: the Hubble sequence at z~2
• The MUSE Hubble Ultra Deep Field Survey. IX. Evolution of galaxy merger fraction since z~6
• The SINS/zC-SINF Survey of z~2 Galaxy Kinematics: Rest-frame Morphology, Structure, and Colors from Near-infrared Hubble Space Telescope Imaging
• Distinguishing Mergers and Disks in High Redshift Observations of Galaxy Kinematics
• Morpho-kinematics of z~1 galaxies probe the hierarchical scenario
• Dark matter in galaxies
• The angular momentum of disc galaxies at z=1
• The KMOS Galaxy Evolution Survey (KGES): the angular momentum of star-forming galaxies over the last ~10 Gyr
• The Dynamics and Distribution of Angular Momentum in HiZELS Star-Forming Galaxies at z = 0.8 - 3.3
• From Peculiar Morphologies to Hubble-type Spirals: The relation between galaxy dynamics and morphology in star-forming galaxies at z~1.5
• Angular momentum of $z\sim 1.5$ galaxies and their local analogues with adaptive optics

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