{
  "id": "1807.04763",
  "version": "v1",
  "published": "2018-07-12T18:00:08.000Z",
  "updated": "2018-07-12T18:00:08.000Z",
  "title": "Searching for Environmental Effects on Galaxy Kinematics in Groups and Clusters at z~1 from the ORELSE Survey",
  "authors": [
    "Debora Pelliccia",
    "Brian C. Lemaux",
    "Adam R. Tomczak",
    "Lori M. Lubin",
    "Lu Shen",
    "Benoıt Epinat",
    "Po-Feng Wu",
    "Roy R. Gal",
    "Nicholas Rumbaugh",
    "Dale D. Kocevski",
    "Laurence Tresse",
    "Gordon Squires"
  ],
  "comment": "20 pages, 8 figures, 2 table, submitted to MNRAS. Comments welcome",
  "categories": [
    "astro-ph.GA"
  ],
  "abstract": "We present an investigation of the dependence of galaxy kinematics on the environment for a sample of 94 star-forming galaxies at $z\\sim0.9$ from the ORELSE survey. ORELSE is a large photometric and spectroscopic campaign dedicated to mapping out and characterizing galaxy properties across a full range of environments in 15 fields containing large-scale structures (LSSs) in a redshift range of $0.6 < z < 1.3$. We constrained the rotation velocity for our kinematic sample in an ORELSE field, containing the SC1604 supercluster, by fitting high-resolution semi-analytical models to the data. We constructed the stellar-mass/B-band Tully-Fisher relation and found no dependence of the intrinsic scatter on both local and global environment. Moreover, we compared the stellar-to-dynamical mass ratio ($M_\\ast/M_{dyn}$) of SC1604 galaxies to those residing in less dense local environment by leveraging data from the HR-COSMOS sample. We found that, at fixed stellar mass, SC1604 galaxies have $\\sim30\\%$ smaller dynamical masses on average. By comparing the distributions of the galaxy parameters that define $M_{dyn}$ (i.e., circular velocity and the characteristic radius $r_{2.2}$) between SC1604 and HR-COSMOS, we found that smaller dynamical masses are mostly caused by smaller $r_{2.2}$ for SC1604 galaxies. We also observed that SC1604 galaxies in general show $\\sim20\\%$ lower stellar specific angular momentum ($j_\\ast$) with respect to the HR-COSMOS sample. Adopting literature estimates for (1) the excess rate of galaxy-galaxy mergers in intermediate/high-density environments and (2) the average amount of $j_\\ast$ loss per merger event, we investigated the possibility that galaxy mergers are mainly responsible for the loss of angular momentum in higher density environments.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2018-07-12T18:00:08.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "galaxy kinematics",
      "orelse survey",
      "environmental effects",
      "sc1604 galaxies",
      "lower stellar specific angular momentum"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 20,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}