Orientation effects on cool gas absorption from gravitational-arc tomography of a z = 0.77 disc galaxy

Abstract

We use spatially-resolved spectroscopy of a distant giant gravitational arc to test orientation effects on MgII absorption equivalent width (EW) and covering fraction (kappa) in the circumgalactic medium of a foreground star-forming galaxy (G1) at z~0.77. Forty-two spatially-binned arc positions uniformly sample impact parameters (D) to G1 between 10 and 30 kpc and azimuthal angles alpha between 30 and 90 degrees (minor axis). We find an EW-D anti-correlation, akin to that observed statistically in quasar absorber studies, and an apparent correlation of both EW and kappa with alpha, revealing a non-isotropic gas distribution. In line with our previous results on MgII kinematics suggesting the presence of outflows in G1, at minimum a simple 3-D static double-cone model (to represent the trace of bipolar outflows) is required to recreate the EW spatial distribution. The D and alpha values probed by the arc cannot confirm the presence of a disc, but the data highly disfavor a disc alone. Our results support the interpretation that the EW-alpha correlation observed statistically using other extant probes is partly shaped by bipolar metal-rich winds.

arXiv commentAccepted in Monthly Notices of the Royal Astronomical Society

References in corpus (47)

• The Circumgalactic Medium
• The MUSE second-generation VLT instrument
• Absorption-Line Probes of Gas and Dust in Galactic Superwinds
• Evidence for Ubiquitous Collimated Galactic-Scale Outflows along the Star-Forming Sequence at z~0.5
• ZAP -- Enhanced PCA Sky Subtraction for Integral Field Spectroscopy
• The radial and azimuthal profiles of Mg II absorption around 0.5 < z < 0.9 zCOSMOS galaxies of different colors, masses and environments
• The Cosmic Baryon and Metal Cycles
• The Asymmetric Wind in M82
• Demographics and Physical Properties of Gas Out/Inflows at 0.4 < z < 1.4
• An Empirical Characterization of Extended Cool Gas Around Galaxies Using MgII Absorption Features
• Physical properties of galactic winds using background quasars
• Tracing Outflows and Accretion: A Bimodal Azimuthal Dependence of MgII Absorption
• The Kinematic Connection Between QSO-Absorbing Gas and Galaxies at Intermediate Redshift
• Resolving small-scale cold circumgalactic gas in TNG50
• MAGIICAT II. General Characteristics of the MgII Absorbing Circumgalactic Medium
• Angular Momentum Acquisition in Galaxy Halos
• MusE GAs FLOw and Wind (MEGAFLOW) II. A study of gas accretion around $z\approx 1$ star-forming galaxies with background quasars
• MusE GAs FLOw and Wind (MEGAFLOW) III: galactic wind properties using background quasars
• Quasars Probing Galaxies: I. Signatures of Gas Accretion at Redshift Approximately 0.2
• The circumgalactic medium of eBOSS emission line galaxies: signatures of galactic outflows in gas distribution and kinematics
• A 100-kiloparsec wind feeding the circumgalactic medium of a massive compact galaxy
• A clumpy and anisotropic galaxy halo at z=1 from gravitational-arc tomography
• Kinematics of Circumgalactic Gas: Feeding Galaxies and Feedback
• The Kinematic Composition of MgII Absorbers
• Decomposition of the Superwind in M82
• Circumgalactic Mg II Emission from an Isotropic Starburst Galaxy Outflow Mapped by KCWI
• Spatially Resolved Velocity Maps of Halo Gas Around Two Intermediate-redshift Galaxies
• A Complete Census of Circumgalactic MgII at Redshift z<~ 0.5
• MusE GAs FLOw and Wind (MEGAFLOW) VIII. Discovery of a MgII emission halo probed by a quasar sightline
• Probing the Cool Interstellar and Circumgalactic Gas of Three Massive Lensing Galaxies at z=0.4-0.7
• Galaxies Probing Galaxies in PRIMUS - I. Sample, Spectroscopy, and Characteristics of the z~0.5 MgII-Absorbing Circumgalactic Medium
• Small Scale Structure at High Redshift: III. The Clumpiness of the Intergalactic Medium on Sub-kpc Scales
• Slicing the cool circumgalactic medium along the major-axis of a star-forming galaxy at $z=0.7$
• Observational signatures of a warped disk associated with cold-flow accretion
• Galactic inflow and wind recycling rates in the EAGLE simulations
• Two Lensed z~3 Lyman Break Galaxies Discovered in the SDSS Giant Arcs Survey
• Galaxies Probing Galaxies at High Resolution: Co-Rotating Gas Associated with a Milky Way Analog at z=0.4
• The Angular Momentum of the Circumgalactic Medium in the TNG100 Simulation
• Spatially Resolved Metal Gas Clouds
• Telltale signs of metal recycling in the circumgalactic medium of a $z\sim 0.77$ galaxy
• Clues to the nature of high-redshift OVI absorption systems from their (lack of) small-scale structure
• Kinematics of the Circumgalactic Medium of a $z=0.77$ Galaxy from MgII Tomography
• The MUSE Extremely Deep Field: a first panoramic view of an Mg II emitting intragroup medium
• MusE GAs FLOw and Wind (MEGAFLOW) IV: A two sightline tomography of a galactic wind
• Morphological and Rotation Structures of Circumgalactic Mg II Gas in the EAGLE Simulation and the Dependence on Galaxy Properties
• Most of the cool CGM of star-forming galaxies is not produced by supernova feedback
• Resolving the HI in Damped Lyman-α systems that power star-formation

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• Directly constraining the spatial coherence of the $z\sim 1$ circumgalactic medium
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• Modelling the mass accretion histories of dark matter haloes using a Gamma formalism
• Spatially Resolved Circumgalactic Medium around a Star-Forming Galaxy Driving a Galactic Outflow at $z\approx 0.8$
• Gamma Analytical Modeling Evolution (GAME) I: The physical implications of deriving the stellar mass functions from z=0 to z=8
• The multiple coherence scales of C IV at cosmic noon
• Intergalactic Medium Tomography with the Sunburst Arc
• First statistical constraints on galactic scale outflows properties traced by their extended Mg II emission with MUSE
• A z$\sim$1 galactic-scale outflow transversally mapped to $\sim$50 kpc through gravitational-arc tomography