Home > Research > Publications & Outputs > Stellar Dynamical Models for 797 z ∼ 0.8 Galaxi...

Associated organisational unit

Electronic data

  • 2108.08142v1

    Rights statement: This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi:10.3847/1538-4357/ac1f29

    Accepted author manuscript, 2.45 MB, PDF document

    Embargo ends: 7/12/22

    Available under license: CC BY-NC: Creative Commons Attribution-NonCommercial 4.0 International License

Links

Text available via DOI:

Keywords

View graph of relations

Stellar Dynamical Models for 797 z ∼ 0.8 Galaxies from LEGA-C

Research output: Contribution to journalJournal articlepeer-review

Published
  • Josha van Houdt
  • Arjen van der Wel
  • Rachel Bezanson
  • Marijn Franx
  • Francesco D'Eugenio
  • Ivana Barisic
  • Eric F. Bell
  • Anna Gallazzi
  • Anna de Graaff
  • Michael V. Maseda
  • Camilla Pacifici
  • Jesse van de Sande
  • David Sobral
  • Caroline Straatman
  • Po-Feng Wu
Close
Article number11
<mark>Journal publication date</mark>7/12/2021
<mark>Journal</mark>The Astrophysical Journal
Issue number1
Volume923
Publication StatusPublished
<mark>Original language</mark>English

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 $V/\sigma\sim1-2$. 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.

Bibliographic note

This is an author-created, un-copyedited version of an article accepted for publication/published in The Astrophysical Journal. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at doi:10.3847/1538-4357/ac1f29