Bipolar Outflows out to 10~kpc for Massive Galaxies at Redshift $z\approx 1$

Abstract

Galactic outflows are believed to play a critical role in the evolution of galaxies by regulating their mass build-up and star formation. Theoretical models assumes bipolar shapes for the outflows that extends well into the circumgalctic medium (CGM), up to tens of kpc perpendicular to the galaxies. They have been directly observed in the local Universe in several individual galaxies, e.g., around the Milky Way and M82. At higher redshifts, cosmological simulations of galaxy formation predict an increase in the frequency and efficiency of galactic outflows due to the increasing star formation activity. Outflows are responsible for removing potential fuel for star formation from the galaxy, while at the same enriching the CGM and the intergalactic medium. These feedback processes, although incorporated as key elements of cosmological simulations, are still poorly constrained on CGM scales. Here we present an ultra-deep MUSE image of the mean MgII emission surrounding a sample of galaxies at z~1 that strongly suggests the presence of outflowing gas on physical scales of more than 10kpc. We find a strong dependence of the detected signal on the inclination of the central galaxy, with edge-on galaxies clearly showing enhanced MgII emission along the minor axis, while face-on galaxies display much weaker and more isotropic emission. We interpret these findings as supporting the idea that outflows typically have a bipolar cone geometry perpendicular to the galactic disk. We demonstrate that the signal is not dominated by a few outliers. After dividing the galaxy sample in subsamples by mass, the bipolar emission is only detected in galaxies with stellar mass ${\mathrm{M}}_{\ast }\gtrsim 10^{9.5}{\mathrm{M}}_{\odot }$.

arXiv commentpublished in Nature. 25 pages, 10 figures

References in corpus (50)

• Star Formation in Galaxies Along the Hubble Sequence
• The Circumgalactic Medium
• The MUSE second-generation VLT instrument
• Gusty, gaseous flows of FIRE: galactic winds in cosmological simulations with explicit stellar feedback
• Evidence for Ubiquitous Collimated Galactic-Scale Outflows along the Star-Forming Sequence at z~0.5
• The MUSE Hubble Ultra Deep Field Survey: I. Survey description, data reduction and source detection
• The radial and azimuthal profiles of Mg II absorption around 0.5 < z < 0.9 zCOSMOS galaxies of different colors, masses and environments
• Extended Lyman alpha haloes around individual high-redshift galaxies revealed by MUSE
• Molecular Gas in M82: Resolving the Outflow and Streamers
• Physical properties of galactic winds using background quasars
• The Keck Cosmic Web Imager Integral Field Spectrograph
• The Mass-Metallicity and Luminosity-Metallicity Relation from DEEP2 at z ~ 0.8
• Detection of large-scale X-ray bubbles in the Milky Way halo
• Tracing Outflows and Accretion: A Bimodal Azimuthal Dependence of MgII Absorption
• Absorption-line probes of the prevalence and properties of outflows in present-day star-forming galaxies
• Metal flows of the circumgalactic medium, and the metal budget in galactic halos
• Nearly all the sky is covered by Lyman-alpha emission around high redshift galaxies
• The Properties and Prevalence of Galactic Outflows at z = 1 in the Extended Groth Strip
• The dependence of Galactic outflows on the properties and orientation of zCOSMOS galaxies at z ~ 1
• 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
• The MUSE Hubble Ultra Deep Field surveys: Data release II
• The circumgalactic medium of eBOSS emission line galaxies: signatures of galactic outflows in gas distribution and kinematics
• Evolution of the Cool Gas in the Circumgalactic Medium (CGM) of Massive Halos -- A Keck Cosmic Web Imager (KCWI) Survey of Ly$\alpha$ Emission around QSOs at $z\approx 2$
• Predictions for the Angular Dependence of Gas Mass Flow Rate and Metallicity in the Circumgalactic Medium
• Low-ionization Line Emission from Starburst Galaxies: A New Probe of Galactic-Scale Outflows
• A 100-kiloparsec wind feeding the circumgalactic medium of a massive compact galaxy
• Optically-Thin Spatially-Resolved Mg II Emission Maps the Escape of Ionizing Photons
• Kinematics of Circumgalactic Gas: Feeding Galaxies and Feedback
• Scattered Emission from z~1 Galactic Outflows
• The MUSE Hubble Ultra Deep Field Survey XIII. Spatially resolved spectral properties of Lyman alpha haloes around star-forming galaxies at z > 3
• Modeling the distribution of Mg II absorbers around galaxies using Background Galaxies & Quasars
• The MUSE Extremely Deep Field: the Cosmic Web in Emission at High Redshift
• Circumgalactic Mg II Emission from an Isotropic Starburst Galaxy Outflow Mapped by KCWI
• MusE GAs FLOw and Wind (MEGAFLOW) VIII. Discovery of a MgII emission halo probed by a quasar sightline
• Metal enrichment in the circumgalactic medium and Lyα haloes around quasars at z $\sim$3
• Spectral variations of Lyman-alpha emission within strongly lensed sources observed with MUSE
• The MUSE Hubble Ultra Deep Field Survey: XII. MgII emission and absorption in star-forming galaxies
• MgII in the JWST Era: a Probe of Lyman Continuum Escape?
• The MUSE eXtremely Deep Field: Individual detections of Lyα haloes around rest-frame UV-selected galaxies at z~2.9-4.4
• The Geometry of Cold, Metal-Enriched Gas Around Galaxies at $z\sim 1.2$
• The Smooth MgII gas distribution through the interstellar/extra-planar/halo interface
• A Semi-Analytical Line Transfer (SALT) Model II: the effects of a Bi-Conical geometry
• The MUSE Extremely Deep Field: a first panoramic view of an Mg II emitting intragroup medium
• How gas flows shape the stellar-halo mass relation in the EAGLE simulation
• The Circumgalactic Medium of Extreme Emission Line Galaxies at z ~ 2: Resolved Spectroscopy and Radiative Transfer Modeling of Spatially Extended Lyman-alpha Emission in the KBSS-KCWI Survey
• Directly tracing cool filamentary accretion over >100 kpc into the interstellar medium of a quasar host at z=1
• A 30 kpc Spatially Extended Clumpy and Asymmetric Galactic Outflow at z $\sim$ 1.7
• The MUSE Hubble Ultra Deep Field Survey XVI. The angular momentum of low-mass star-forming galaxies. A cautionary tale and insights from TNG50
• A $\sim$15 kpc outflow cone piercing through the halo of the blue compact metal-poor galaxy SBS0335-052

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• Why are thermally- and cosmic ray-driven galactic winds fundamentally different?
• Linking Mg II and [O II] spatial distribution to ionizing photon escape in confirmed LyC leakers and non-leakers
• Cosmic Ray-Driven Galactic Winds with Resolved ISM and Ion-Neutral Damping
• MusE GAs FLOw and Wind (MEGAFLOW) XIII. Cool gas traced by MgII around isolated galaxies
• A galactic outflow traced by its extended Mg II emission out to a $\sim 30$ kpc radius in the Hubble Ultra Deep Field with MUSE
• A public grid of radiative transfer simulations for Lyman-alpha and metal lines in idealised galactic outflows
• Baryonic Ecosystem in Galaxies (BEINGMgII) -- II. Unveiling the Nature of Galaxies Harboring Cool Gas Reservoirs
• Metal line emission around z<1 galaxies
• Misty, patchy, and turbulent: constraining the cool circumgalactic medium with mCC
• How far have metals reached? Reconciling statistical constraints and enrichment models at reionization
• A search for cold molecular outflows in cosmic noon galaxies
• Kinematic analysis of an Ultra-Strong MgII absorber at z~1.13 linking to Circumgalactic Gas Structures
• First statistical constraints on galactic scale outflows properties traced by their extended Mg II emission with MUSE
• The MUSE Ultra Deep Field (MUDF) VIII. The cool gas distribution surrounding galaxies at redshifts z ~ 0.5-2
• Modeling Multiphase Galactic Outflows: A Multifluid Moving Mesh Approach
• MUSE-ALMA Haloes XIV: The ALMA Large Programme Data Release
• Baryonic Ecosystem IN Galaxies (BEINGMgII) -- III. Cool gas reservoirs at $0.3\le z\le 1.6$ in the Dark Energy Survey
• The stellar population of a $z\sim 3.25$ Ly$\alpha$ emitting group associated with a damped Ly$\alpha$ absorber