The CIV-MgII Kinematics Connection in <z>~0.7 Galaxies

Abstract

We have examined Faint Object Spectrograph data from the Hubble Space Telescope Archive for CIV 1548,1550 absorption associated with 40 MgII 2796,2803 absorption-selected galaxies at 0.4 < z < 1.4. We report a strong correlation between MgII kinematics, measured in 6 km/s resolution HIRES/Keck spectra, and W_r(1548); this implies a physical connection between the processes that produce "outlying velocity" MgII clouds and high ionization galactic/halo gas. We found no trend in ionization condition, W_r(1548)/W_r(2796), with galaxy-QSO line-of-sight separation for 13 systems with confirmed associated galaxies, suggesting no obvious ionization gradient with galactocentric distance in these higher redshift galaxies. We find tentative evidence (2-sigma) that W_r(1548)/W_r(2796) is anti-correlated with galaxy <B-K> color; if further data corroborate this trend, in view of the strong CIV-MgII kinematics correlation, it could imply a connection between stellar populations, star formation episodes, and the kinematics and ionization conditions of halo gas at z~1.

Accepted to Astrophysical Journal Letters; 4 pages; 3 figures; emulateapj.sty

Cited by in corpus (28)

• Discovery of Damped Lyman-Alpha Systems at Redshifts Less Than 1.65 and Results on their Incidence and Cosmological Mass Density
• Quasar Outflows and AGN Feedback in the Far UV: HST/COS Observations of QSO HE0238-1904
• The Origin of C IV Absorption Systems at Redshifts z<1---Discovery of Extended C IV Envelopes Around Galaxies
• Major contributor to AGN feedback: VLT X-shooter observations of SIV BAL QSO outflows
• Low and High Ionization Absorption Properties of Mg II Absorption-Selected Galaxies at Intermediate Redshifts. I. General Properties
• On the Incidence and Kinematics of Strong Mg II Absorbers
• The Population of Weak MgII Absorbers. II The Properties of Single-Cloud Systems
• Optical properties and spatial distribution of MgII absorbers from SDSS image stacking
• Low and High Ionization Absorption Properties of Mg II Absorption-Selected Galaxies at Intermediate Redshifts. II. Taxonomy, Kinematics, and Galaxies
• Narrow associated QSO absorbers: clustering, outflows and the line-of-sight proximity effect
• High-Redshift Superwinds as the Source of the Strongest Mg II Absorbers: A Feasibility Analysis
• Ionized Gas in Damped Lyman Alpha Protogalaxies: I. Model-Independent Inferences From Kinematic Data
• The Last Eight-Billion Years of Intergalactic CIV Evolution
• BAL phosphorus abundance and evidence for immense ionic column densities in quasar outflows: VLT X-Shooter observations of quasar SDSS J1512+1119
• The neutral gas extent of galaxies as derived from weak intervening CaII absorbers
• A Correlation Between Galaxy Morphology and MgII Halo Absorption Strength
• The Multi-phase Absorption Systems Toward PG 1206+459
• The Absorption Signature of Six MgII-Selected Systems Over 0.5<z<0.9
• A Quadruple-Phase Strong Mg II Absorber at z~0.9902 Toward PG 1634+706
• Models of Five Absorption Line Systems Along the Line of Sight Toward PG0117+213
• On the Incidence of C IV Absorbers Along the Sightlines to Gamma-Ray Bursts
• H-alpha Imaging with HST+NICMOS of An Elusive Damped Ly-alpha Cloud at z=0.6
• Lost and Found: The Damped Lyman Alpha Absorbers in the QSO OI 363
• MgII Absorption Lines in z=2.974 Damped Lyman-alpha System toward Gravitationally Lensed QSO APM 08279+5255: Detection of Small-scale Structure in MgII Absorbing Clouds
• Evolution of the Population of Very Strong MgII Absorbers
• Pair Lines of Sight Observations of Multiphase Gas Bearing O VI in a Galaxy Environment
• Solar-Metallicity Gas in the Extended Halo of a Galaxy at $z\sim 0.12$
• Mg II & C IV Kinematics vs. Stellar Kinematics in Galaxies