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- W4200029467 abstract "We present spatially resolved stellar kinematics for 797 $z=0.6-1$ galaxies selected from the LEGA-C survey and construct axisymmetric Jeans models to quantify their dynamical mass and degree of rotational support. The survey is $K_s$-band selected, irrespective of color or morphological type, and allows for a first assessment of the stellar dynamical structure of the general $L^*$ galaxy population at large lookback time. Using light profiles from Hubble Space Telescope imaging as a tracer, our approach corrects for observational effects (seeing convolution and slit geometry), and uses well-informed priors on inclination, anisotropy and a non-luminous mass component. Tabulated data include total mass estimates in a series of spherical apertures (1, 5, and 10 kpc; 1$times$ and 2$times$re), as well as rotational velocities, velocity dispersions and anisotropy. We show that almost all star-forming galaxies and $sim$50% of quiescent galaxies are rotation-dominated, with deprojected $V/sigmasim1-2$. Revealing the complexity in galaxy evolution, we find that the most massive star-forming galaxies are among the most rotation-dominated, and the most massive quiescent galaxies among the least rotation-dominated galaxies. These measurements set a new benchmark for studying galaxy evolution, using stellar dynamical structure for galaxies at large lookback time. Together with the additional information on stellar population properties from the LEGA-C spectra, the dynamical mass and $V/sigma$ measurements presented here create new avenues for studying galaxy evolution at large lookback time." @default.
- W4200029467 created "2021-12-31" @default.
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- W4200029467 date "2021-12-01" @default.
- W4200029467 modified "2023-10-13" @default.
- W4200029467 title "Stellar Dynamical Models for 797 z ∼ 0.8 Galaxies from LEGA-C" @default.
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- W4200029467 doi "https://doi.org/10.3847/1538-4357/ac1f29" @default.
- W4200029467 hasPublicationYear "2021" @default.