The Interaction of the Fermi Bubbles with the Milky Way's Hot Gas Halo

Abstract

The Fermi bubbles are two lobes filled with non-thermal particles that emit gamma rays, extend $\approx$10 kpc vertically from the Galactic center, and formed from either nuclear star formation or accretion activity on Sgr A*. Simulations predict a range of shock strengths as the bubbles expand into the surrounding hot gas halo distribution ($T_{halo}\approx 2\times 10^6$ K), but with significant uncertainties in the energetics, age, and thermal gas structure. The bubbles should contain thermal gas with temperatures between $10^6$ and $10^8$ K, with potential X-ray signatures. In this work, we constrain the bubbles' thermal gas structure by modeling the OVII and OVIII emission line strengths from archival XMM-Newton and Suzaku data. Our emission model includes a hot thermal volume-filled bubble component cospatial with the gamma-ray region, and a shell of compressed material. We find that a bubble/shell model with $n\approx 1\times 10^{-3}$ cm${}^{-3}$ and with log($T$) $\approx$ 6.60-6.70 is consistent with the observed line intensities. In the framework of a continuous Galactic outflow, we infer a bubble expansion rate, age, and energy injection rate of $490_{-77}^{+230}$ km s${}^{-1}$, $4.3_{-1.4}^{+0.8}$ Myr, and $2.3_{-0.9}^{+5.1}\times 10^{42}$ erg s${}^{-1}$. These estimates are consistent with the bubbles forming from a Sgr A* accretion event rather than from nuclear star formation.

arXiv commentAccepted for publication in ApJ - 23 pages, 11 figures, 3 tables

References in corpus (117)

• emcee: The MCMC Hammer
• The chemical composition of the Sun
• On the variation of the Initial Mass Function
• Starburst99: Synthesis Models for Galaxies with Active Star Formation
• The Leiden/Argentine/Bonn (LAB) Survey of Galactic HI: Final data release of the combined LDS and IAR surveys with improved stray-radiation corrections
• Collisional Plasma Models with APEC/APED: Emission Line Diagnostics of Hydrogen-like and Helium-like Ions
• Monitoring stellar orbits around the Massive Black Hole in the Galactic Center
• Measuring Distance and Properties of the Milky Way's Central Supermassive Black Hole with Stellar Orbits
• Hot Accretion Flows Around Black Holes
• Galactic Winds
• Heating Hot Atmospheres with Active Galactic Nuclei
• Closest Star Seen Orbiting the Supermassive Black Hole at the Centre of the Milky Way
• An Observational Determination of the Bolometric Quasar Luminosity Function
• Giant Gamma-ray Bubbles from Fermi-LAT: AGN Activity or Bipolar Galactic Wind?
• Observational constraints on growth of massive black holes
• Chandra X-ray Spectroscopic Imaging of Sgr A* and the Central Parsec of the Galaxy
• The First Measurement of Spectral Lines in a Short-Period Star Bound to the Galaxy's Central Black Hole: A Paradox of Youth
• Updated Atomic Data and Calculations for X-ray Spectroscopy
• Self-Consistent Models of the AGN and Black Hole Populations: Duty Cycles, Accretion Rates, and the Mean Radiative Efficiency
• The XMM-Newton Serendipitous Survey. V. The Second XMM-Newton Serendipitous Source Catalogue
• The orbit of the star S2 around SgrA* from VLT and Keck data
• HI in Local Group Dwarf Galaxies and Stripping by the Galactic Halo
• Where Are the Baryons? II: Feedback Effects
• A High Spectral Resolution Observation of the Soft X-ray Diffuse Background with Thermal Detectors
• The resolved fraction of the Cosmic X-ray Background
• Super-massive Black Hole Demography: the Match between the Local and Accreted Mass Functions
• Reproducibility of Non-X-ray Background for the X-ray Imaging Spectrometer aboard Suzaku
• The Spectrum and Morphology of the Fermi Bubbles
• The Large-scale Bipolar Wind in the Galactic Center
• An Unambiguous Detection of Faraday Rotation in Sagittarius A*
• Turbulent Structure of a Stratified Supernova-Driven Interstellar Medium
• A huge reservoir of ionized gas around the Milky Way: Accounting for the Missing Mass?
• The Fermi Haze: A Gamma-Ray Counterpart to the Microwave Haze
• Fueling Low-Level AGN Activity Through the Stochastic Accretion of Cold Gas
• Numerical Simulation of Hot Accretion Flows (II): Nature, Origin, and Properties of Outflow and Their Possible Observational Applications
• XMM-Newton Observation of Solar Wind Charge Exchange Emission
• Constraining the Milky Way's Hot Gas Halo with OVII and OVII Emission Lines
• Numerical Simulation of Hot Accretion Flows (III): Revisiting wind properties using trajectory approach
• The Structure of the Milky Way's Hot Gas Halo
• Extended Anomalous Foreground Emission in the WMAP 3-Year Data
• The Shortest Known Period Star Orbiting our Galaxy's Supermassive Black Hole
• Star Formation in the Central 400 pc of the Milky Way: Evidence for a Population of Massive YSOs
• Do Hot Haloes Around Galaxies Contain the Missing Baryons?
• The Fermi Bubbles. I. Possible Evidence for Recent AGN Jet Activity in the Galaxy
• Active Galactic Nuclei in the Sloan Digital Sky Survey: II. Emission-Line Luminosity Function
• A Chandra Study of Sgr A East: A Supernova Remnant Regulating The Activity Of Our Galactic Center?
• Galaxy Zoo: The fundamentally different co-evolution of supermassive black holes and their early- and late-type host galaxies
• An Extended Star Formation History for the Galactic Center from Hubble Space Telescope/NICMOS Observations
• Energy Spectra of the Soft X-ray Diffuse Emission in Fourteen Fields Observed with Suzaku
• Detection of a Hot Gaseous Halo Around the Giant Spiral Galaxy NGC 1961
• Vertical structure of a supernova-driven turbulent magnetized ISM
• Gas Rich Dwarf Spheroidals
• The Fermi Bubbles: Supersonic AGN Jets with Anisotropic Cosmic Ray Diffusion
• A New Model For The Loop-I (The North Polar Spur) Region
• X-Ray Absorption from the Milky Way Halo and the Local Group
• Chandra Observations of the "Dark" Moon and Geocoronal Solar-Wind Charge Transfer
• X-ray Scaling Properties of Early-type Galaxies
• Unveiling the corona of the Milky Way via ram-pressure stripping of dwarf satellites
• The Milky Way's Fermi Bubbles: Echoes of the Last Quasar Outburst?
• Hot X-ray coronae around massive spiral galaxies: a unique probe of structure formation models
• Massive Coronae of Galaxies
• Origin of the Fermi Bubble
• A Unified Model of the Fermi Bubbles, Microwave Haze, and Polarized Radio Lobes: Reverse Shocks in the Galactic Center's Giant Outflows
• XMM-Newton Detects a Hot Gaseous Halo in the Fastest Rotating Spiral Galaxy UGC 12591
• Suzaku observations of the diffuse x-ray emission across the fermi bubbles' edges
• An XMM-Newton Survey of the Soft X-ray Background. III. The Galactic Halo X-ray Emission
• Probing the Fermi Bubbles in Ultraviolet Absorption: A Spectroscopic Signature of the Milky Way's Biconical Nuclear Outflow
• On the Hot Gas Content of the Milky Way Halo
• A Deep XMM-Newton Study of the Hot Gaseous Halo Around NGC 1961
• Charge-Transfer induced EUV and Soft X-ray emissions in the Heliosphere
• Bipolar-Hyper-Shell Galactic Center Statrburst Model: Further Evidence from ROSAT Data and New Radio and X-ray Simulations
• X-ray Absorption Line Spectroscopy of the Galactic Hot Interstellar Medium
• ASCA Observations of the Sgr B2 Cloud: An X-Ray Reflection Nebula
• Fermi Bubbles Inflated by Winds Launched from the Hot Accretion Flow in Sgr A*
• A RIAF Interpretation for the Past Higher Activity of the Galactic Center Black Hole and the 511 keV Annihilation Emission
• Suzaku Observations of the Local and Distant Hot ISM
• OVII and OVIII line emission in the diffuse soft X-ray background: heliospheric and galactic contributions
• Non-Thermal Insights on Mass and Energy Flows Through the Galactic Centre and into the Fermi Bubbles
• A high charge state Coronal Mass Ejection seen through solar wind charge exchange emission as detected by XMM-Newton
• Fossil imprint of a powerful flare at the Galactic Centre along the Magellanic Stream
• Fermi Bubbles in the Milky Way: the closest AGN feedback laboratory courtesy of Sgr A*?
• The origin of the 'local' 1/4 keV X-ray flux in both charge exchange and a hot bubble
• Isolated Wolf-Rayet Stars and O Supergiants in the Galactic Center Region Identified via Paschen-alpha Excess
• The Trouble with the Local Bubble
• Identifying XMM-Newton observations affected by solar wind charge exchange - Part I
• A Galactic Origin for the Local Ionized X-ray Absorbers
• Recent star formation in the inner Galactic Bulge seen by ISOGAL II -- The Central Molecular Zone
• The Fermi Bubbles. II. The Potential Roles of Viscosity and Cosmic Ray Diffusion in Jet Models
• Modeling the distribution of Mg II absorbers around galaxies using Background Galaxies & Quasars
• Chandra Observations of Diffuse X-Rays from the Sagittarius B2 Cloud
• The Fermi Bubbles as Starburst Wind Termination Shocks
• Detection of a luminous hot X-ray corona around the massive spiral galaxy NGC266
• The Fermi Bubbles: Gamma-ray, Microwave, and Polarization Signatures of Leptonic AGN Jets
• X-ray and UV spectroscopy of Galactic diffuse hot gas along the LMC X--3 sight line
• Multi-wavelength features of Fermi Bubbles as signatures of a Galactic wind
• Xmm-Newton Observations of the Diffuse X-ray Background
• Evolution of the ISM of Starburst galaxies: the SN heating efficiency
• Identifying XMM-Newton observations affected by solar wind charge exchange - Part II
• ASCA Discovery of Diffuse 6.4 keV Emission Near the Sgr C Complex: A New X-ray Reflection Nebula
• An XMM-Newton Survey of the Soft X-ray Background. II. An All-Sky Catalog of Diffuse O VII and O VIII Emission Intensities
• Faraday Tomography of the North Polar Spur: Constraints on the distance to the Spur and on the Magnetic Field of the Galaxy
• Local ISM 3D distribution and soft X-ray background: Inferences on nearby hot gas and the North Polar Spur
• The Non-isothermality and Extent of Galactic Diffuse Hot Gas Toward Mrk~421
• Suzaku Observations of the North Polar Spur: Evidence for Nitrogen Enhancement
• X-ray Spectroscopy of Galactic Hot Gas along the PKS 2155-304 Sight Line
• The Accretion Wind Model of the Fermi Bubbles (II): Radiation
• The North Polar Spur and Aquila Rift
• A Hadronic-Leptonic Model for the Fermi Bubbles: Cosmic-Rays in the Galactic Halo and Radio Emission
• Enhancement of Terrestrial Diffuse X-ray Emission Associated With Coronal Mass Ejection and Geomagnetic Storm
• Steady-State Hadronic Gamma-Ray Emission from 100-Myr-Old Fermi Bubbles
• Multi-wavelength Emission from the Fermi Bubble III. Stochastic (Fermi) Re-Acceleration of Relativistic Electrons Emitted by SNRs
• Galactic-Center Hyper-Shell Model for the North Polar Spurs
• XMM-Newton and Suzaku X-ray Shadowing Measurements of the Solar Wind Charge Exchange, Local Bubble, and Galactic Halo Emission
• Suzaku X-ray Observations of the Fermi Bubbles: Northernmost Cap and Southeast Claw Discovered with MAXI-SSC
• Determining The Galactic Halo's Emission Measure from UV and X-ray Observations
• Studying the Interstellar Medium and the inner region of NPS/Loop 1 with shadow observations toward MBM36
• Metal Enrichment in the Fermi Bubbles as a Probe of Their Origin

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• Detection of large-scale X-ray bubbles in the Milky Way halo
• The Extended Distribution of Baryons Around Galaxies
• Mass inflow rate into the Central Molecular Zone: observational determination and evidence of episodic accretion
• The Life Cycle of the Central Molecular Zone. I: Inflow, Star Formation, and Winds
• X-ray bubbles in the circumgalactic medium of TNG50 Milky Way- and M31-like galaxies: signposts of supermassive black hole activity
• Spatial distribution of the Milky Way hot gaseous halo constrained by Suzaku X-ray observations
• Blowing in the Milky Way wind: neutral hydrogen clouds tracing the Galactic nuclear outflow
• Fermi and eRosita bubbles as relics of the past activity of the Galactic black hole
• The large-scale ionization cones in the Galaxy
• Cosmic Ray Models
• Cold gas in the Milky Way's nuclear wind
• X-ray and Gamma-ray Observations of the Fermi Bubbles and NPS/Loop I Structures
• Discovery of a very hot phase of the Milky Way CGM with non-solar abundance ratios
• Multiple temperature components of the hot circumgalactic medium of the Milky Way
• Circumgalactic Oxygen Absorption and Feedback
• The Spatially Uniform Spectrum of the Fermi Bubbles: the Leptonic AGN Jet Scenario
• Unveiling the Origin of the Fermi Bubbles
• Simulating the Fermi Bubbles as Forward Shocks Driven by AGN Jets
• The Properties of the Galactic Hot Gaseous Halo from X-ray Emission
• Observation of Acceleration of HI Clouds Within the Fermi Bubbles
• Mapping Outflowing Gas in the Fermi Bubbles: a UV Absorption Survey of the Galactic Nuclear Wind
• Evidence for massive warm-hot circumgalactic medium around NGC 3221
• Clues to the origin of Fermi Bubbles from OVIII/OVII line ratio
• Thermal and chemical properties of the eROSITA bubbles from Suzaku observations
• Possible connection between the asymmetry of North Polar Spur and Loop I with Fermi Bubbles
• Revealing the Ionization Properties of the Magellanic Stream using Optical Emission
• Giant cosmic ray halos around M31 and the Milky Way
• Models of rotating coronae
• Milky Way as a Neutrino Desert Revealed by IceCube Galactic Plane Observation
• Depletion of bright red giants in the Galactic center during its active phases
• Kinematics of the Magellanic Stream and Implications for its Ionization
• Fermi bubble edges: spectrum and diffusion function
• Tracing the Milky Way's Vestigial Nuclear Jet
• Interaction of the Galactic-Centre Super Bubbles with the Gaseous Disc
• Origin of Galactic Spurs: New Insight from Radio/X-ray All-sky Maps
• Misaligned jets from Sgr A${}^{\ast }$ and the origin of Fermi/eROSITA bubbles
• The Fermi bubbles from stochastic acceleration of electrons in a Galactic outflow
• Discovery of High-Velocity H$\alpha$ Emission in the Direction of the Fermi Bubble
• Analytical and numerical studies of central galactic outflows powered by tidal disruption events -- a model for the Fermi bubbles?
• Fermi bubbles: high latitude X-ray supersonic shell
• Diagnostics of Gaseous Halo of the Milky Way by a Shock Wave from the Galactic Centre
• Contribution of the Galactic center to the local cosmic-ray flux
• Sgr A${}^{\ast }$ envelope explosion and the young stars in the centre of the Milky Way
• The Solar-Cycle Temporal Variation of the Solar Wind Charge Exchange X-ray Lines
• Diverse metallicities of Fermi bubble clouds indicate dual origins in the disk and halo
• Fermi bubbles: the collimated outburst needed to explain forward-shock edges
• Revealing Gas Inflows towards the Galactic Central Molecular Zone
• The time-dependent Rayleigh-Taylor instability in interstellar shells and supershells, including the eROSITA bubbles
• The Bending Feature of the Fermi Bubbles: A Presumed Horizontal Galactic Wind and Its Implication on the Bubbles' Age
• Probing the Halo Gas Distribution in the Inner Galaxy with Fermi Bubble Observations
• CO Emission Delineating the Interface between the Milky Way Nuclear Wind Cavity and the Gaseous Disk
• Discovery of non-equilibrium ionization plasma associated with the North Polar Spur and Loop I
• Sources and Radiations of the Fermi Bubbles
• The Fermi bubbles as a Superbubble
• A New High-latitude H I Cloud Complex Entrained in the Northern Fermi Bubble
• On the contribution of cosmic-ray interactions in the circumgalactic gas to the observed high-energy neutrino flux
• Multi-wavelength emission from leptonic processes in ageing galaxy bubbles
• How is Cold Gas Loaded into Galactic Nuclear Outflows?
• Modelling the non-equilibrium chemistry of the Milky Way's cold nuclear wind
• Past activity of Sgr A* is unlikely to affect the local cosmic-ray spectrum up to the TeV regime