Please use this identifier to cite or link to this item:
|Title:||Stellar Dynamical Models for 797 z 0.8 Galaxies from LEGA-C||Authors:||van Houdt, Josha
VAN DER WEL, ARJEN
Bell, Eric F.
GALLAZZI, Anna Rita
de Graaff, Anna
Maseda, Michael V.
van de Sande, Jesse
|Issue Date:||2021||Journal:||THE ASTROPHYSICAL JOURNAL||Number:||923||Issue:||1||First Page:||11||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 <SUB> s </SUB>-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 look-back 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 × and 2 × R <SUB>e</SUB>), as well as rotational velocities, velocity dispersions, and anisotropy. We show that almost all star-forming galaxies and ~50% of quiescent galaxies are rotation dominated, with deprojected V/σ ~ 1-2. 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 look-back time. Together with the additional information on stellar population properties from the LEGA-C spectra, the dynamical mass and V/σ measurements presented here create new avenues for studying galaxy evolution at large look-back time.||URI:||http://hdl.handle.net/20.500.12386/31697||URL:||https://iopscience.iop.org/article/10.3847/1538-4357/ac1f29
|Appears in Collections:||1.01 Articoli in rivista|
Show full item record
Files in This Item:
checked on Jul 2, 2022
checked on Jul 2, 2022
Items in DSpace are published in Open Access, unless otherwise indicated.