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Cited by 5Astrophysics and Cosmic PhenomenaAstrophysical Phenomena and ObservationsGamma-ray bursts and supernovae

A galactic breeze origin for the Fermi bubbles emission

Open access
Tourmente, Olivier, Rodgers-Lee, D, Taylor, Andrew M·2022·Monthly Notices of the Royal Astronomical Society
DOI 10.1093/mnras/stac3517
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Abstract

The origin of the Fermi bubbles, which constitute two gamma-ray emitting lobes above and below the Galactic plane, remains unclear. The possibility that this Fermi bubbles gamma-ray emission originates from hadronic cosmic rays advected by a subsonic Galactic outflow, or breeze, is here explored. The simulation of a breeze solution and subsequent cosmic ray transport is carried out using the hydrodynamical code, PLUTO, in combination with a cosmic ray transport code. The Galactic outflow model obtained is found to be compatible with both inferences of the decelerating outflow velocity profile of the gas in the Fermi bubbles region, and evidence for the presence of a large amount of hot ionized gas out in the Galactic halo region. Although simple, this model is found to be able to reproduce the observed Fermi-LAT energy flux at high Galactic latitudes. Following these results a prediction concerning the gamma-ray emission for 1–3 TeV photons is made for future comparison with CTA/SWGO measurements.

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Crossref · 10.1093/mnras/stac3517

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15 of 15 references verified0 citation errors · 0 not checkable

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Each is checked against this paper’s own text: does it say what the citing paper says it does?

  • The model does not reproduce the observed sharp edge of the FBs.

    “The model, however, does not reproduce the observed sharp edge of the FBs.”

    From The Fermi/eROSITA bubbles: a look into the nuclear outflow from the Milky Way (2024) · cites this paper as Tourmente et al. 2023

  • The wind achieves a steady-state bi-polar CR structure over a time scale of ∼300 Myr and produces a hadronic γ-ray emission that is consistent with the observations.

    “The wind achieves a steady-state bi-polar CR structure over a time scale of ∼ 300 Myr and produces a hadronic γ -ray emission that is consistent with the observations.”

    From The Fermi/eROSITA bubbles: a look into the nuclear outflow from the Milky Way (2024) · cites this paper as Tourmente et al. 2023

  • Tourmente et al. (2023) solved the CR transport equations in a 'Galactic breeze' setup where a subsonic wind (v_wind ∼200 km/s) is injected from the GC.

    “More recently, Tourmente et al. (2023) solved the CR transport equations in a 'Galactic breeze' setup where a subsonic wind ( v wind ∼ 200 km s -1 ) is injected from the GC.”

    From The Fermi/eROSITA bubbles: a look into the nuclear outflow from the Milky Way (2024) · cites this paper as Tourmente et al. 2023

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Authors
Tourmente, O., Rodgers-Lee, D., & Taylor, A. M.
Affiliations
  • Deutsches Elektronen-Synchrotron DESY (DE)
  • Dublin Institute For Advanced Studies (IE)
Corresponding author
Tourmente, Olivier
ORCID
Venue
Monthly Notices of the Royal Astronomical Society
Publisher
Oxford University Press (OUP)
Published
2022-12-01
Volume
518
Issue
4
Pages
6083-6091
ISSN
  • 0035-8711 (ISSN-L)
  • 1365-2966
DOI
10.1093/mnras/stac3517
OpenAlex
W4310868598
Cited by
5
References
15
Citations by year
2026: 1 · 2025: 2 · 2024: 1 · 2023: 1
FWCI
0.13
Type
journal article
Language
en
Open access
Licence
academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model (vor)
Locations
  • Monthly Notices of the Royal Astronomical Society (publishedVersion)
  • arXiv (Cornell University) (submittedVersion)
  • Desy publication database (The Deutsches Elektronen-Synchrotron) (submittedVersion)
  • DESY Publication Database (PUBDB) (Deutsches Elektronen-Synchrotron) (submittedVersion, other-oa)
  • arXiv (Cornell University)
  • DESY Publication Database (PUBDB) (Deutsches Elektronen-Synchrotron)
Funders
  • Deutsches Elektronen-Synchrotron
  • Science Foundation Ireland (21/PATH-S/9339)
Topics
  • Physical Sciences › Physics and Astronomy › Nuclear and High Energy Physics › Astrophysics and Cosmic Phenomena
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Astrophysical Phenomena and Observations
  • Physical Sciences › Physics and Astronomy › Astronomy and Astrophysics › Gamma-ray bursts and supernovae
Keywords
Fermi bubbles, galactic outflows, cosmic ray propagation, hadronic gamma-ray emission, Galactic halo, TeV gamma-ray emission, fluid simulation, cosmic ray acceleration

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