2021
DOI: 10.1051/0004-6361/202039636
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Abstract: Context. Outflows and feedback are key ingredients of galaxy evolution. Evidence for an outflow arising from the Galactic center (GC) – the so-called GC chimneys – has recently been discovered at radio, infrared, and X-ray bands. Aims. We undertake a detailed examination of the spatial relationships between the emission in the different bands in order to place constraints on the nature and history of the chimneys and to better understand their impact on the GC environment and their relation with Galactic scale… Show more

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Cited by 22 publications
(30 citation statements)
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References 104 publications
(114 reference statements)
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“…In addition to non-thermal photons, evidence for CRs at the GC comes from observations that could be explained by pressure from CR-driven winds (Heywood et al 2019;Nakashima et al 2019;Ponti et al 2019;Yusef-Zadeh & Wardle 2019;Ponti et al 2021). Similar winds could be responsible for the Fermi Bubbles, and could explain the observed blue-shifted atomic hydrogen lines from the CMZ (Oka et al 2019) and high-velocity clouds moving away from the disk (McClure-Griffiths et al 2013).…”
Section: Introductionmentioning
confidence: 99%
“…In addition to non-thermal photons, evidence for CRs at the GC comes from observations that could be explained by pressure from CR-driven winds (Heywood et al 2019;Nakashima et al 2019;Ponti et al 2019;Yusef-Zadeh & Wardle 2019;Ponti et al 2021). Similar winds could be responsible for the Fermi Bubbles, and could explain the observed blue-shifted atomic hydrogen lines from the CMZ (Oka et al 2019) and high-velocity clouds moving away from the disk (McClure-Griffiths et al 2013).…”
Section: Introductionmentioning
confidence: 99%
“…Heywood et al (2019) revealed the presence of large-scale synchrotron 'chimneys' that are possible outflows from Sgr A * . The Radio Arc NTFs are located precisely at the northeastern edge of the chimney as can be seen in Heywood et al (2019) and Ponti et al (2021). The chimney is an edge-brightened synchro1tron source, and so could be the source of the internal rotation detected along these lines-of-sight.…”
Section: Likelihood Of the Radio Shell Causing Alternating Magnetic F...mentioning
confidence: 70%
“…Their synchrotron nature indicates the presence of relativistic, free electrons (Yusef-Zadeh et al 1984). The source and mechanism causing the electrons to accelerate to relativistic velocities, however, remain a topic of active debate with many hypotheses (see references in Ponti et al 2021).…”
Section: Introductionmentioning
confidence: 99%
“…2) are enveloped by ever larger radio and X-ray arcs inclined by ∼ 15 • toward the north-west to end in similar prows at similar radius; this tilt persists to the largest scale of radio emission (purple dashed line in Figure 2). To the north, the X-ray pattern offsets east of similar radio continuum emission (Heywood et al 2019;Ponti et al 2021). The enigmatic, vertical bundle of flux tubes (Guan et al 2021) at 15 radius east may confine the X-ray emission, which at least in the north protrudes farther eastward once the filaments end.…”
Section: Bubbles and Channelsmentioning
confidence: 95%
“…To the south, radio synchrotron 1-2 Myr old appears to envelop the X-rays (Nakashima et al 2013;Ponti et al 2013). Just those electrons attest to an eruption of 7 × 10 52 erg (Ponti et al 2021;Heywood et al 2019), but certainly orders of magnitude more energetic than that because the entrained ions and dust, being inefficient radiators, retain much more kinetic energy.…”
Section: Bubbles and Channelsmentioning
confidence: 99%